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The OI!STER is an STM32L5 Target Board with a QFP48 clamshell socket aimed at debugging and glitching salvaged MCUs. The board can be powered via USB-C, a 2032 coin cell battery on the back of the board or an external power suppy. All pins are broken out in the 24-pin headers on either side at the top of the board. The OI!STER contains five debug headers, to support a wide range of debugging hardware such as a [https://hydrabus.com/hydrabus-1-0-specifications/ Hydrabus] or a [https://1bitsquared.com/products/black-magic-probe Black Magic Probe]. It comes with six SMA connectors arranged in I/O pairs. One pair is dedicated to glitching the external LSE clock, another for glitching the external HSE clock and one pair for power analysis and fault injection with a [https://www.newae.com/chipwhisperer Chipwhisperer]. Each SMA connector can be bypassed by removing a small jumper. The OI!STER also has additional solder jumpers for the external clocks and each of the power traces to the MCU to allow for quick experimentation.
The OI!STER is an STM32L5 Target Board with a QFP48 clamshell socket aimed at debugging and glitching salvaged MCUs. The board can be powered via USB-C, a 2032 coin cell battery on the back of the board or an external power suppy. All pins are broken out in the 24-pin headers on either side at the top of the board. The OI!STER contains five debug headers, to support a wide range of debugging hardware such as a [https://hydrabus.com/hydrabus-1-0-specifications/ Hydrabus] or a [https://1bitsquared.com/products/black-magic-probe Black Magic Probe]. It comes with six SMA connectors arranged in I/O pairs. One pair is dedicated to glitching the external LSE clock, another for glitching the external HSE clock and one pair for power analysis and fault injection with a [https://www.newae.com/chipwhisperer Chipwhisperer]. Each SMA connector can be bypassed by removing a small jumper. The OI!STER also has additional solder jumpers for the external clocks and each of the power traces to the MCU to allow for quick experimentation.
<br><br>
The Pinout diagrams below are directed at reverse engineering. The first diagram is targeted at debugging and reverse engineering an STM32L5 MCU itself. The second diagram is aimed at the communication between external peripherals and the MCU. Although some functionaly might overlap, we've found it practical to define these two pinout groups. Additional documentation is currently under development.
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== '''LPUART/USART/UART/SWD/JTAG/OSC/OSC32 Pinout''' ==
<!-- Carousel items -->
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{| class="wikitable"
</div>
<br>
=='''Debug Pinout Diagram'''==
[[Image:OISTER Pinout DBG-50.png | class=img-fluid]]
<br>
{| class="wikitable" cellspacing=5 cellpadding=5
|+
|+
! scope="row" | LPUART/USART/UART/SWD/JTAG/OSC/OSC32 Pinout
! colspan="3" |Debug Pinout
|-
|-
| [[File:OISTER Pinout DBG-50.png|2000px]]
! width="50" colspan="1" scope="col" |Pin
! width="100" colspan="1" scope="col" |Function
! width="150" scope="col" |Alternate Function
|-
|-
 
! scope="row" |1
{| class="wikitable"
|VBAT
|+
! scope="col" colspan="1"| Pin
! scope="col" colspan="1"| Function
! scope="col" colspan="4"| Alternate Function
|-
|-
! scope="row" | 1
! scope="row" |2
| VBAT
|PC13
|-
|-
! scope="row" | 2
! scope="row" |3
| PC13
|PC14
| OSC32_IN
|-
|-
! scope="row" | 3
! scope="row" |4
| PC14
|PC15
| OSC32_IN
|OSC32_OUT
|-
! scope="row" | 4
| PC15
| OSC32_OUT
|-
|-
! scope="row" | 5
! scope="row" | 5
| PH0
|PH0
| OSC_IN
|OSC_IN
|-
|-
! scope="row" | 6  
! scope="row" |6
| PH1
 
| OSC_OUT
|PH1
|OSC_OUT  
|-
|-
! scope="row" | 7
! scope="row" |7
| NRST
|NRST
|-
|-
! scope="row" | 8
! scope="row" |8
| VSSA
|VSSA  
| VREF-
|VREF-
|-
|-
! scope="row" | 9
! scope="row" |9
| VDDA
|VDDA
| VREF+
|VREF+
|-
|-
! scope="row" | 10  
! scope="row" | 10
| PA0
|PA0
| UART4_TX
|UART4_TX
| USART2_CTS
|-
|-
! scope="row" | 11
! scope="row" |11  
| PA1
|PA1
| UART4_RX
|UART4_RX
| USART2_RTS
|-
|-
! scope="row" | 12
! scope="row" |12
| PA2
|PA2
| LPUART1_TX
|LPUART1_TX  
| USART2_TX
|-
|-
! scope="row" | 13
! scope="row" |13
| PA3
|PA3
| LPUART1_RX
|LPUART1_RX
| USART2_RX
|-
|-
! scope="row" | 14  
! scope="row" |14  
| PA4
|PA4
| USART2_CK
|USART2_CK
|-
|-
! scope="row" | 15
! scope="row" |15
| PA5
|PA5
|-
|-
! scope="row" | 16
! scope="row" |16
| PA6  
|PA6
| LPUART1_CTS
|LPUART1_CTS
| USART3_CTS
|-
|-
! scope="row" | 17
! scope="row" |17
| PA7
|PA7
|-
|-
! scope="row" | 18  
! scope="row" | 18
| PB0  
|PB0
| LED1
|LED1
| USART3_CK
|-
|-
! scope="row" | 19
! scope="row" |19
| PB1
|PB1
| LED2
|LED2
| LPUART1_RTS
| USART3_RTS
|-
|-
! scope="row" | 20
! scope="row" |20
| PB2
|PB2
|UCPD1_FRSTX2
|-
|-
! scope="row" | 21
! scope="row" |21
| PB10
| PB10
| LPUART1_RX
|USART3_TX
| USART3_TX
|-
|-
! scope="row" | 22
! scope="row" |22
| PB11
|PB11
| LPUART1_TX
|USART3_RX
| USART3_RX
|-
|-
! scope="row" | 23
! scope="row" |23
| VSS
|VSS
|-
|-
! scope="row" | 24
! scope="row" |24
| VDD
|VDD  
|-
|-
! scope="row" | 25
! scope="row" |25
| PB12
|PB12  
| USART3_CK
|LPUART1_RTS
| LPUART1_RTS
|-
|-
! scope="row" | 26  
! scope="row" |26
| PB13
|PB13
| USART3_CTS
|LPUART1_CTS
| LPUART1_CTS
|-
|-
! scope="row" | 27
! scope="row" |27  
| PB14
|PB14
| USART3_RTS
|UCPD1_DB2
|-
|-
! scope="row" | 28
! scope="row" |28
| PB15
|PB15
|UCPD1_CC2
|-
|-
! scope="row" | 29
! scope="row" |29
| PA8
|PA8
| USART1_CK
|USART1_CK
|-
|-
! scope="row" | 30  
! scope="row" |30
| PA9
|PA9
| USART1_TX
|USART1_TX
|-
|-
! scope="row" | 31
! scope="row" |31  
| PA10
|PA10
| USART1_RX
|USART1_RX
|-
|-
! scope="row" | 32
! scope="row" |32
| PA11
|PA11
| USART1_CTS
|USART1_CTS
| USB_DM
|-
|-
! scope="row" | 33
! scope="row" |33
| PA12
|PA12
| USART1_RTS
|USART1_RTS
| USB_DP
|-
|-
! scope="row" | 34
! scope="row" |34
| PA13
| PA13
| JTMS
|JTMS
| SWDIO
| USB_NOE
|-
|-
! scope="row" | 35
! scope="row" |35
| VSS_2  
|VSS_2
|-
|-
! scope="row" | 36
! scope="row" |36  
| VDD_2
|VDD_2  
|-
|-
! scope="row" | 37
! scope="row" |37
| PA14
|PA14
| JTCK
|JTCK
| SWCLK
|-
|-
! scope="row" | 38
! scope="row" |38
| PA15
|PA15
| JTDI
|JTDI
| USART2_RX
| USART3_RTS
| UART4_RTS
|-
|-
! scope="row" | 39
! scope="row" |39
| PB3
|PB3
| JTDO
| JTDO
| TRACESWO
| USART1_RTS
|-
|-
! scope="row" | 40
! scope="row" |40  
| PB4
|PB4
| NJTRST
|NJTRST
| USART1_CTS
 
|-
|-
! scope="row" | 41
! scope="row" | 41
| PB5
|PB5
| USART1_CK
|UCPD1_DB1
|-
|-
! scope="row" | 42
! scope="row" |42
| PB6
 
| USART1_TX
|PB6
|USART1_TX
|-
|-
! scope="row" | 43  
! scope="row" |43
| PB7
|PB7
| USART1_RX
|UART4_CTS  
| UART4_CTS
|-
|-
! scope="row" | 44
! scope="row" |44
| PH3
 
| BOOT0
|PH3  
|BOOT0
|-
|-
! scope="row" | 45
! scope="row" |45
| PB8
|PB8
|-
|-
! scope="row" | 46
! scope="row" | 46
| PB9
|PB9  
|-
! scope="row" |47
|VSS_3
|-
! scope="row" |48
|VDD_3
|}
 
=='''Protocol Pinout Reference'''==
{| class="wikitable" cellspacing=5 cellpadding=5
|+
! colspan="3" |'''USB'''
|-
! width="50" colspan="1" scope="col" |Pin
! width="150" colspan="1" scope="col" |Function
! width="200" colspan="1" scope="col" |Description
|-
|-
! scope="row" |32
|USB_DM
|Data -
|-
|-
! scope="row" | 47
! scope="row" |33
| VSS_3
|USB_DP
| Data +
|-
|-
! scope="row" | 48
! scope="row" |34
| VDD_3
|USB_NOE
|Output Enable
|}
|}


=== LPUART1 ===
{| class="wikitable" cellspacing=5 cellpadding=5
|+
| colspan="3" |'''UCPD1'''
|-
! width="50" colspan="1" scope="col" |Pin
! width="150" colspan="1" scope="col" |Function
! width="200" colspan="1" scope="col" |Description
|-
! scope="row" |12
|UCPD1_FRSTX1
|Fast Role Swap Signal
|-
! scope="row" |20
|UCPD1_FRSTX2
|Fast Role Swap Signal
|-
! scope="row" | 27
|UCPD1_DB2
|Dead-Battery Signal
|-
! scope="row" |28
|UCPD1_CC2
|Configuration Control Line
|-
! scope="row" |38
|UCPD1_CC1
|Configuration Control Line
|-
! scope="row" |41
|UCPD1_DB1
|Dead-Battery Signal
|}
 
{| class="wikitable" cellspacing=5 cellpadding=5
|+
| colspan="3" |'''UART4'''
|-
! width="50" colspan="1" scope="col" |Pin
! width="150" colspan="1" scope="col" |Function
! width="200" colspan="1" scope="col" |Description
|-
! scope="row" |10
|UART4_TX
| Transmit Data
|-
! scope="row" |11
|UART4_RX
|Receive Data
|-
! scope="row" |38
|UART4_RTS
|Request To Send
|-
! scope="row" |43
|UART4_CTS
|Clear To Send
|}


{| class="wikitable"
{| class="wikitable" cellspacing=5 cellpadding=5
|+
|+
! scope="col" colspan="2"| Pin
| colspan="4" |'''LPUART1'''
! scope="col" colspan="2"| Function
|-
|-
! scope="row" | 12  
! width="60" colspan="2" scope="col" |Pin
! scope="row" | 22
! width="150" colspan="1" scope="col" |Function
| LPUART1_TX
! width="200" colspan="1" scope="col" |Description
|-
! scope="row" |12
! scope="row" |22
|LPUART1_TX
|Transmit Data
|-
|-
! scope="row" | 13  
! scope="row" |13
! scope="row" | 21
! scope="row" |21  
| LPUART1_RX
|LPUART1_RX
|Receive Data
|-
|-
! scope="row" | 16  
! scope="row" |16  
! scope="row" | 26
! scope="row" | 26  
| LPUART1_CTS
| LPUART1_CTS
| Clear To Send
|-
|-
! scope="row" | 19  
! scope="row" |19  
! scope="row" | 25
! scope="row" | 25
| LPUART1_RTS
|LPUART1_RTS
|Request To Send
|}
|}


=== USART1 ===
{| class="wikitable" cellspacing=5 cellpadding=5
 
{| class="wikitable"
|+
|+
! scope="col" colspan="2"| Pin
| colspan="4" |'''USART1'''
! scope="col" colspan="2"| Function
|-
! width="60" colspan="2" scope="col" |Pin
! width="150" colspan="1" scope="col" |Function
! width="200" colspan="1" scope="col" |Description
|-
|-
! scope="row" | 29  
! scope="row" |29
! scope="row" | 41
! scope="row" |41
| USART1_CK
|USART1_CK
|Transmitter Clock
|-
|-
! scope="row" | 30  
! scope="row" | 30
! scope="row" | 42
! scope="row" |42
| USART1_TX
|USART1_TX
|Transmit Data
|-
|-
! scope="row" | 31  
! scope="row" |31  
! scope="row" | 43
! scope="row" | 43
| USART1_RX
|USART1_RX
|Receive Data
|-
! scope="row" |32
! scope="row" |40
|USART1_CTS
| Clear To Send
|-
! scope="row" |32
! scope="row" |40
|USART1_NSS
|Slave Select
|-
|-
! scope="row" | 32
! scope="row" |33
! scope="row" | 40
! scope="row" | 39
| USART1_CTS
|USART1_RTS
| Request To Send
|-
|-
! scope="row" | 33  
! scope="row" |33
! scope="row" | 39
! scope="row" | 39
| USART1_RTS
|USART1_DE
|Driver Enable
|}
|}


=== USART2 ===
{| class="wikitable" cellspacing=5 cellpadding=5
 
{| class="wikitable"
|+
|+
! scope="col" colspan="2"| Pin
| colspan="4" |'''USART2'''
! scope="col" colspan="2"| Function
|-
! width="60" colspan="2" scope="col" |Pin
! width="150" colspan="1" scope="col" |Function
! width="200" colspan="1" scope="col" |Description
|-
|-
! scope="row" | 10  
! scope="row" |10
! scope="row" |
! scope="row" |
| USART2_CTS
|USART2_CTS
|Clear To Send
|-
|-
! scope="row" | 11
! scope="row" |10
! scope="row" |
! scope="row" |
| USART2_RTS
|USART2_NSS
|Slave Select
|-
|-
! scope="row" | 12  
! scope="row" |11
! scope="row" |  
! scope="row" |
|USART2_RTS
|Request To Send
|-
! scope="row" |11
! scope="row" |
|USART2_DE
|Driver Enable
|-
! scope="row" |12
! scope="row" |
| USART2_TX
| USART2_TX
| Transmit Data
|-
|-
! scope="row" | 13  
! scope="row" |13
! scope="row" | 38
! scope="row" |38
| USART2_RX
|USART2_RX
|Receive Data
|-
|-
! scope="row" | 14  
! scope="row" |14
! scope="row" |
! scope="row" |
| USART2_CK
|USART2_CK
|Transmitter Clock
|}
|}


=== USART3 ===
{| class="wikitable" cellspacing=5 cellpadding=5
 
{| class="wikitable"
|+
|+
! scope="col" colspan="2"| Pin
| colspan="5" |'''USART3'''
! scope="col" colspan="2"| Function
|-
|-
! scope="row" | 16
! width="90" colspan="3" scope="col" |Pin
! scope="row" | 26
! width="150" colspan="1" scope="col" |Function
| USART3_CTS
! width="200" colspan="1" scope="col" |Description
|-
|-
! scope="row" | 18
! scope="row" |16
! scope="row" | 25
! scope="row" |26
| USART3_CK
! scope="row" |
|USART3_CTS
|Clear To Send
|-
|-
! scope="row" | 19
! scope="row" |16
! scope="row" | 27
! scope="row" |26
| USART3_RTS
! scope="row" |
|USART3_NSS
|Slave Select
|-
|-
! scope="row" | 21
! scope="row" |18
! scope="row" |  
! scope="row" |25
| USART3_TX
! scope="row" |
|USART3_CK
|Transmitter Clock
|-
|-
! scope="row" | 22
! scope="row" | 19
! scope="row" |  
! scope="row" |27
| USART3_RX
! scope="row" |38
|}
|USART3_RTS
 
|Request To Send
=== UART4 ===
 
{| class="wikitable"
|+
! scope="col" colspan="1"| Pin
! scope="col" colspan="2"| Function
|-
|-
! scope="row" | 10
! scope="row" |21
| UART4_TX
! scope="row" | 27
! scope="row" |38
|USART3_DE
| Driver Enable
|-
|-
! scope="row" | 11
! scope="row" |21
| UART4_RX
! scope="row" |
! scope="row" |
|USART3_TX
|Transmit Data
|-
|-
! scope="row" | 38
! scope="row" |22
| UART4_RTS
! scope="row" |
|-
! scope="row" |
! scope="row" | 43
|USART3_RX
| UART4_CTS
|Request Data
|}
|}


=== SWD ===
{| class="wikitable" cellspacing=5 cellpadding=5
 
{| class="wikitable"
|+
|+
! scope="col" colspan="1"| Pin
| colspan="3" |'''JTAG'''
! scope="col" colspan="2"| Function
|-
! width="50" colspan="1" scope="col" |Pin
! width="150" colspan="1" scope="col" |Function
! width="200" colspan="1" scope="col" |Description
|-
|-
! scope="row" | 7
! scope="row" |34
| NRST
|JTMS
|Test Mode State
|-
|-
! scope="row" | 34
! scope="row" |37
| SWDIO
|JTCK
|Test Clock
|-
|-
! scope="row" | 37
! scope="row" |38
| SWCLK
|JTDI
|Test Data In
|-
|-
! scope="row" | 38
! scope="row" |39
| NC
|JTDO
|Test Data Out
|-
|-
! scope="row" | 39
! scope="row" |40
| TRACESWO
 
|NJTRST
|Reset
|}
|}


=== JTAG ===
{| class="wikitable" cellspacing=5 cellpadding=5
 
{| class="wikitable"
|+
|+
! scope="col" colspan="1"| Pin
| colspan="3" |'''SWD'''
! scope="col" colspan="2"| Function
|-
|-
! scope="row" | 34
! width="50" colspan="1" scope="col" |Pin
| JTMS
! width="150" colspan="1" scope="col" |Function
! width="200" colspan="1" scope="col" |Description
|-
|-
! scope="row" | 37
! scope="row" |7
| JTCK
|NRST
|Reset
|-
|-
! scope="row" | 38
! scope="row" |34
| JTDI
|SWDIO
|Data I/O
|-
|-
! scope="row" | 39
! scope="row" |37
| JTDO
|SWCLK
|Clock
|-
|-
! scope="row" | 40
! scope="row" |39
| NJTRST
|TRACESWO
|Trace Output
|}
|}


=== OSC ===
{| class="wikitable" cellspacing=5 cellpadding=5
 
{| class="wikitable"
|+
|+
! scope="col" colspan="1"| Pin
| colspan="3" |'''OSC'''
! scope="col" colspan="2"| Function
|-
|-
! scope="row" | 5
! width="50" colspan="1" scope="col" |Pin
| OSC_IN
! width="150"colspan="1" scope="col" |Function
! width="350" colspan="1" scope="col" |Description
|-
|-
! scope="row" | 6  
! scope="row" |5
| OSC_OUT
|OSC_IN
|High Speed External Clock In (HSEI)
|-
! scope="row" |6
|OSC_OUT  
|High Speed External Clock Out (HSEO)
|}
|}


=== OSC32 ===
{| class="wikitable" cellspacing=5 cellpadding=5
 
{| class="wikitable"
|+
|+
! scope="col" colspan="1"| Pin
| colspan="3" |'''OSC32'''
! scope="col" colspan="2"| Function
|-
|-
! scope="row" | 3  
! width="50" colspan="1" scope="col" |Pin
| OSC32_IN
! width="150" colspan="1" scope="col" |Function
! width="350" colspan="1" scope="col" |Description
|-
! scope="row" |3
|OSC32_IN
|Low Speed External Clock In (LSEI)
|-
|-
! scope="row" | 4  
! scope="row" |4
| OSC32_OUT
|OSC32_OUT
|Low Speed External Clock Out (LSEO)
|}
|}


== '''I2C/SPI/OCTOSPI/FDCAN/SDMMC Pinout''' ==
=='''Peripheral Pinout Diagram'''==
 
[[Image:OISTER Peripheral Pinout.png | class=img-fluid]]
{| class="wikitable"
<br>
{| class="wikitable"" cellspacing=5 cellpadding=5
|+
|+
!  scope="row" | I2C/SPI/OCTOSPI/FDCAN/SDMMC Pinout
| colspan="6" |'''Peripheral Pinout'''
|-
| [[File:OISTER Peripheral Pinout.png|2400px]]
|-
|-
 
! width="50" colspan="1" scope="col" |Pin
{| class="wikitable"
! width="100" colspan="1" scope="col" |Function
|+
! width="150" colspan="1" scope="col" |Alternate
! scope="col" colspan="1"| Pin
! width="150" colspan="1" scope="col" |
! scope="col" colspan="1"| Function
! width="150" colspan="1" scope="col" |
! scope="col" colspan="5"| Alternate Function
! width="150" colspan="1" scope="col" |
|-
|-
! scope="row" | 1
! scope="row" |1
| VBAT
|VBAT
|-
|-
! scope="row" | 2  
! scope="row" |2
| PC13
|PC13
|-
|-
! scope="row" | 3
! scope="row" | 3
| PC14  
|PC14
|-
|-
! scope="row" | 4
! scope="row" |4
| PC15
|PC15
|-
|-
! scope="row" | 5
! scope="row" |5
| PH0
|PH0
|-
|-
! scope="row" | 6  
! scope="row" |6
| PH1
|PH1
 
|-
|-
! scope="row" | 7
! scope="row" | 7
| NRST
|NRST
|-
|-
! scope="row" | 8
! scope="row" |8
| VSSA
|VSSA
|-
|-
! scope="row" | 9
! scope="row" | 9
| VDDA
|VDDA
|-
|-
! scope="row" | 10  
! scope="row" |10  
| PA0
|PA0
|-
|-
! scope="row" | 11
! scope="row" |11
| PA1
|PA1
| I2C1_SMBA
| I2C1_SMBA
| SPI1_SCK
|SPI1_SCK
| OCTOSPI1_DQS
|-
|-
! scope="row" | 12
! scope="row" |12
| PA2
|PA2
| OCTOSPI1_NCS
|OCTOSPI1_NCS
 
|-
|-
! scope="row" | 13
! scope="row" |13
| PA3
|PA3
| OCTOSPI1_CLK
|OCTOSPI1_CLK
|-
|-
! scope="row" | 14  
! scope="row" |14
| PA4
|PA4
| SPI1_NSS
|SPI1_NSS  
| SPI3_NSS
|SPI3_NSS
| OCTOSPI1_NCS
|OCTOSPI1_NCS
|-
|-
! scope="row" | 15
! scope="row" |15
| PA5
| PA5
| SPI1_SCK
|SPI1_SCK
|-
|-
! scope="row" | 16
! scope="row" |16  
| PA6  
|PA6
| SPI1_MISO
|SPI1_MISO
| OCTOSPI1_IO3
|OCTOSPI1_IO3
|-
|-
! scope="row" | 17
! scope="row" |17
| PA7
|PA7
| I2C3_SCL
|I2C3_SCL  
| SPI1_MOSI
|SPI1_MOSI
| OCTOSPI1_IO2
|OCTOSPI1_IO2  
|-
|-
! scope="row" | 18
! scope="row" |18
| PB0  
|PB0
| SPI1_NSS  
|SPI1_NSS
| OCTOSPI1_IO1
| OCTOSPI1_IO1
|-
|-
! scope="row" | 19
! scope="row" |19
| PB1
|PB1
| OCTOSPI1_IO0
|OCTOSPI1_IO0
|-
|-
! scope="row" | 20
! scope="row" |20
| PB2
|PB2
| I2C3_SMBA
|I2C3_SMBA
| OCTOSPI1_DQS
|-
|-
! scope="row" | 21
! scope="row" | 21
| PB10
|PB10
| I2C2_SCL
|I2C2_SCL
| I2C4_SCL
|I2C4_SCL
| SPI2_SCK
|SPI2_SCK
| OCTOSPI1_CLK
|OCTOSPI1_CLK
|-
|-
! scope="row" | 22
! scope="row" |22
| PB11
|PB11
| I2C2_SDA
|I2C2_SDA
| I2C4_SDA
|I2C4_SDA
| OCTOSPI1_NCS
|OCTOSPI1_NCS
|-
|-
! scope="row" | 23
! scope="row" |23
| VSS
|VSS
|-
|-
! scope="row" | 24
! scope="row" | 24
| VDD
|VDD
|-
|-
! scope="row" | 25
! scope="row" |25
| PB12
|PB12
| I2C2_SMBA
|I2C2_SMBA
| SPI2_NSS
| SPI2_NSS  
| OCTOSPI_NCLK
|OCTOSPI_NCLK
|-
|-
! scope="row" | 26  
! scope="row" |26
| PB13
|PB13
| I2C2_SCL
|I2C2_SCL
| SPI2_SCK
|SPI2_SCK  
|-
|-
! scope="row" | 27
! scope="row" |27
| PB14
|PB14
| I2C2_SDA
|I2C2_SDA
| SPI2_MISO
|SPI2_MISO
|-
|-
! scope="row" | 28
! scope="row" | 28
| PB15
|PB15
| SPI2_MOSI
|SPI2_MOSI
|-
|-
! scope="row" | 29
! scope="row" |29
| PA8
|PA8
|-
|-
! scope="row" | 30  
! scope="row" |30
| PA9
|PA9
| SPI2_SCK
|SPI2_SCK
|-
|-
! scope="row" | 31
! scope="row" |31
| PA10
|PA10  
|-
|-
! scope="row" | 32
! scope="row" | 32
| PA11
|PA11  
| SPI1_MISO
|SPI1_MISO  
| FDCAN1_RX
|FDCAN1_RX
|-
|-
! scope="row" | 33
! scope="row" |33
| PA12
|PA12
| SPI1_MOSI
|SPI1_MOSI
| FDCAN1_TX
|FDCAN1_TX
|-
|-
! scope="row" | 34
! scope="row" |34
| PA13
|PA13
 
|-
|-
! scope="row" | 35
! scope="row" |35
| VSS_2  
|VSS_2
|-
|-
! scope="row" | 36
! scope="row" |36
| VDD_2
|VDD_2
|-
|-
! scope="row" | 37
! scope="row" |37
| PA14
|PA14
| I2C1_SMBA
|I2C1_SMBA
| I2C4_SMBA
| I2C4_SMBA
|-
|-
! scope="row" | 38
! scope="row" |38  
| PA15
|PA15
| SPI1_NSS
|SPI1_NSS
| SPI3_NSS
|SPI3_NSS
|-
|-
! scope="row" | 39
! scope="row" |39
| PB3
|PB3  
| SPI1_SCK
|SPI1_SCK
| SPI3_SCK
|SPI3_SCK
|-
|-
! scope="row" | 40
! scope="row" |40  
| PB4
|PB4
| I2C3_SDA
|I2C3_SDA
| SPI1_MISO
|SPI1_MISO
| SPI3_MISO
 
|SPI3_MISO
|-
|-
! scope="row" | 41
! scope="row" |41
| PB5
|PB5
| I2C1_SMBA
|I2C1_SMBA
| SPI1_MOSI
| SPI1_MOSI
| SPI3_MOSI
| SPI3_MOSI
| OCTOSPI_NCLK
|-
|-
! scope="row" | 42
! scope="row" |42
| PB6
|PB6
| I2C2_SCL
|I2C2_SCL
| I2C4_SCL
|I2C4_SCL
|-
|-
! scope="row" | 43  
! scope="row" |43
| PB7
| PB7
| I2C1_SDA
|I2C1_SDA
| I2C4_SDA
|I2C4_SDA
|-
! scope="row" |44
|PH3
|-
! scope="row" |45
|PB8
|I2C1_SCL
|FDCAN1_RX
|-
! scope="row" |46
|PB9
|I2C1_SDA
|SPI2_NSS
|FDCAN1_TX
|-
! scope="row" |47
|VSS_3
|-
! scope="row" |48
|VDD_3
|}
 
=='''Protocol Pinout Reference'''==
 
{| class="wikitable" cellspacing=5 cellpadding=5
|+
| colspan="4" |'''I2C1'''
|-
! width="60" colspan="2" scope="col" |Pin
! width="100" colspan="1" scope="col" |Function
! width="350" colspan="1" scope="col" |Description
|-
! scope="row" |11
! scope="row" |41
|I2C1_SMBA
|System Management Bus Alert (SMBus mode)
|-
! scope="row" |43
! scope="row" |46
|I2C1_SDA
|Serial Data Line
|-
! scope="row" |42
! scope="row" |45
|I2C1_SCL
|Serial Clock Line
|}
 
{| class="wikitable" cellspacing=5 cellpadding=5
|+
| colspan="4" |'''I2C2'''
|-
! width="60" colspan="2" scope="col" | Pin
! width="100" colspan="1" scope="col" |Function
! width="350" colspan="1" scope="col" |Description
|-
! scope="row" |21
! scope="row" |26
|I2C2_SCL
| Serial Clock Line
|-
! scope="row" | 22
! scope="row" |27
|I2C2_SDA
| Serial Data Line
|-
! scope="row" |25
! scope="row" |
|I2C2_SMBA
|System Management Bus Alert (SMBus mode)
|}
 
{| class="wikitable" cellspacing=5 cellpadding=5
|+
| colspan="4" |'''I2C3'''
|-
! width="60" colspan="1" scope="col" |Pin
! width="100" colspan="1" scope="col" | Function
! width="350" colspan="1" scope="col" |Description
|-
! scope="row" | 17
|I2C3_SCL
|Serial Clock Line
|-
! scope="row" |25
| I2C3_SMBA
|System Management Bus Alert (SMBus mode)
|-
! scope="row" |40
|I2C3_SDA
|Serial Data Line
|}
 
{| class="wikitable" cellspacing=5 cellpadding=5
|+
| colspan="4" |'''I2C4'''
|-
! width="60" colspan="2" scope="col" |Pin
! width="100" colspan="1" scope="col" |Function
! width="350" colspan="1" scope="col" |Description
|-
! scope="row" |21
! scope="row" |42
|I2C4_SCL
| Serial Clock Line
|-
! scope="row" |22
! scope="row" |43
|I2C4_SDA
|Serial Data Line
|-
! scope="row" |37
 
! scope="row" |
|I2C4_SMBA
|System Management Bus Alert (SMBus mode)
|}
 
{| class="wikitable" cellspacing=5 cellpadding=5
|+
| colspan="4" |'''SPI1'''
|-
|-
! scope="row" | 44
! width="90" colspan="3" scope="col" |Pin
| PH3
! width="100" colspan="1" scope="col" | Function
! width="150" colspan="1" scope="col" |Description
|-
|-
! scope="row" | 45
! scope="row" |11
| PB8
! scope="row" |15
| I2C1_SCL
! scope="row" |39
| FDCAN1_RX
|SPI1_SCK
| SDMMC1_CKIN
|Serial Clock
| SDMMC1_D4
|-
|-
! scope="row" | 46
! scope="row" |14
| PB9
 
| I2C1_SDA
! scope="row" |18
| SPI2_NSS
! scope="row" |38
| FDCAN1_TX
|SPI1_NSS
| SDMMC1_CDIR
|Slave Select
| SDMMC1_D5
|-
|-
! scope="row" | 47
! scope="row" |16
| VSS_3
! scope="row" |32
! scope="row" |40
|SPI1_MISO
|Master-in, Slave-out
|-
|-
! scope="row" | 48
! scope="row" |17
| VDD_3
! scope="row" |33
! scope="row" |41
|SPI1_MOSI
|Master-out, Slave-in
|}
|}


=== I2C1 ===
{| class="wikitable" cellspacing=5 cellpadding=5
|+
| colspan="4" |'''SPI2'''
|-
! width="60" colspan="2" scope="col" |Pin
! width="100" colspan="1" scope="col" |Function
! width="150" colspan="1" scope="col" |Description
|-
! scope="row" |21
 
! scope="row" |26
|SPI2_SCK
|Serial Clock
|-
! scope="row" |25
! scope="row" |
|SPI2_NSS
|Slave Select
|-
! scope="row" |27
! scope="row" |
|SPI2_MISO
|Master-in, Slave-out
|-
! scope="row" |28
! scope="row" |
|SPI2_MOSI
|Master-out, Slave-in
|}


{| class="wikitable"
{| class="wikitable" cellspacing=5 cellpadding=5
|+
|+
! scope="col" colspan="2"| Pin
| colspan="4" |'''SPI3'''
! scope="col" colspan="2"| Function
|-
! width="60" colspan="2" scope="col" |Pin
! width="100" colspan="1" scope="col" |Function
! width="150" colspan="1" scope="col" |Description
|-
|-
! scope="row" | 11
! scope="row" |14
! scope="row" | 41
 
| I2C1_SMBA
! scope="row" |38
|SPI3_NSS
|Slave Select
|-
! scope="row" |39
! scope="row" |
|SPI3_SCK
|Serial Clock
|-
|-
! scope="row" | 43
! scope="row" |40
! scope="row" | 46
! scope="row" |
| I2C1_SDA
|SPI3_MISO
|Master-in, Slave-out
|-
|-
! scope="row" | 42
! scope="row" |41
! scope="row" | 45
! scope="row" |
| I2C1_SCL
|SPI3_MOSI
|Master-out, Slave-in
|}
|}


=== I2C2 ===
{| class="wikitable" cellspacing=5 cellpadding=5
|+
| colspan="4" |'''OCTOSPI1'''
|-
! width="60" colspan="2" scope="col" |Pin
! width="130" colspan="1" scope="col" | Function
! width="150" colspan="1" scope="col" |Description
|-
! scope="row" |12
! scope="row" |14
| OCTOSPI1_NCS
|Chip Select
|-
! scope="row" |13
! scope="row" |21
|OCTOSPI1_CLK
|Clock
|-
! scope="row" |16
! scope="row" |
|OCTOSPI1_IO3
|I/O Data Line
|-
! scope="row" |17
! scope="row" |
|OCTOSPI1_IO2
|I/O Data Line
|-
! scope="row" | 18
! scope="row" |
|OCTOSPI1_IO1
|I/O Data Line
|}


{| class="wikitable"
{| class="wikitable" cellspacing=5 cellpadding=5
|+
|+
! scope="col" colspan="2"| Pin
| colspan="4" |'''FDCAN'''
! scope="col" colspan="2"| Function
|-
|-
! scope="row" | 21
! width="60" colspan="2" scope="col" |Pin
! scope="row" | 26
! width="100" colspan="1" scope="col" |Function
| I2C2_SCL
! width="150" colspan="1" scope="col" | Description
|-
|-
! scope="row" | 22
! scope="row" | 32
! scope="row" | 27
! scope="row" |45
| I2C2_SDA
|FDCAN_RX
| Receive Data
|-
|-
! scope="row" | 25
! scope="row" |33
! scope="row" | 45
! scope="row" |46
| I2C2_SMBA
|FDCAN_TX
|Transmit Data
|}
|}

Latest revision as of 15:09, 5 July 2023

The OI!STER is an STM32L5 Target Board with a QFP48 clamshell socket aimed at debugging and glitching salvaged MCUs. The board can be powered via USB-C, a 2032 coin cell battery on the back of the board or an external power suppy. All pins are broken out in the 24-pin headers on either side at the top of the board. The OI!STER contains five debug headers, to support a wide range of debugging hardware such as a Hydrabus or a Black Magic Probe. It comes with six SMA connectors arranged in I/O pairs. One pair is dedicated to glitching the external LSE clock, another for glitching the external HSE clock and one pair for power analysis and fault injection with a Chipwhisperer. Each SMA connector can be bypassed by removing a small jumper. The OI!STER also has additional solder jumpers for the external clocks and each of the power traces to the MCU to allow for quick experimentation.

The Pinout diagrams below are directed at reverse engineering. The first diagram is targeted at debugging and reverse engineering an STM32L5 MCU itself. The second diagram is aimed at the communication between external peripherals and the MCU. Although some functionaly might overlap, we've found it practical to define these two pinout groups. Additional documentation is currently under development.


Debug Pinout Diagram

OISTER Pinout DBG-50.png

Debug Pinout
Pin Function Alternate Function
1 VBAT
2 PC13
3 PC14 OSC32_IN
4 PC15 OSC32_OUT
5 PH0 OSC_IN
6 PH1 OSC_OUT
7 NRST
8 VSSA VREF-
9 VDDA VREF+
10 PA0 UART4_TX
11 PA1 UART4_RX
12 PA2 LPUART1_TX
13 PA3 LPUART1_RX
14 PA4 USART2_CK
15 PA5
16 PA6 LPUART1_CTS
17 PA7
18 PB0 LED1
19 PB1 LED2
20 PB2 UCPD1_FRSTX2
21 PB10 USART3_TX
22 PB11 USART3_RX
23 VSS
24 VDD
25 PB12 LPUART1_RTS
26 PB13 LPUART1_CTS
27 PB14 UCPD1_DB2
28 PB15 UCPD1_CC2
29 PA8 USART1_CK
30 PA9 USART1_TX
31 PA10 USART1_RX
32 PA11 USART1_CTS
33 PA12 USART1_RTS
34 PA13 JTMS
35 VSS_2
36 VDD_2
37 PA14 JTCK
38 PA15 JTDI
39 PB3 JTDO
40 PB4 NJTRST
41 PB5 UCPD1_DB1
42 PB6 USART1_TX
43 PB7 UART4_CTS
44 PH3 BOOT0
45 PB8
46 PB9
47 VSS_3
48 VDD_3

Protocol Pinout Reference

USB
Pin Function Description
32 USB_DM Data -
33 USB_DP Data +
34 USB_NOE Output Enable
UCPD1
Pin Function Description
12 UCPD1_FRSTX1 Fast Role Swap Signal
20 UCPD1_FRSTX2 Fast Role Swap Signal
27 UCPD1_DB2 Dead-Battery Signal
28 UCPD1_CC2 Configuration Control Line
38 UCPD1_CC1 Configuration Control Line
41 UCPD1_DB1 Dead-Battery Signal
UART4
Pin Function Description
10 UART4_TX Transmit Data
11 UART4_RX Receive Data
38 UART4_RTS Request To Send
43 UART4_CTS Clear To Send
LPUART1
Pin Function Description
12 22 LPUART1_TX Transmit Data
13 21 LPUART1_RX Receive Data
16 26 LPUART1_CTS Clear To Send
19 25 LPUART1_RTS Request To Send
USART1
Pin Function Description
29 41 USART1_CK Transmitter Clock
30 42 USART1_TX Transmit Data
31 43 USART1_RX Receive Data
32 40 USART1_CTS Clear To Send
32 40 USART1_NSS Slave Select
33 39 USART1_RTS Request To Send
33 39 USART1_DE Driver Enable
USART2
Pin Function Description
10 USART2_CTS Clear To Send
10 USART2_NSS Slave Select
11 USART2_RTS Request To Send
11 USART2_DE Driver Enable
12 USART2_TX Transmit Data
13 38 USART2_RX Receive Data
14 USART2_CK Transmitter Clock
USART3
Pin Function Description
16 26 USART3_CTS Clear To Send
16 26 USART3_NSS Slave Select
18 25 USART3_CK Transmitter Clock
19 27 38 USART3_RTS Request To Send
21 27 38 USART3_DE Driver Enable
21 USART3_TX Transmit Data
22 USART3_RX Request Data
JTAG
Pin Function Description
34 JTMS Test Mode State
37 JTCK Test Clock
38 JTDI Test Data In
39 JTDO Test Data Out
40 NJTRST Reset
SWD
Pin Function Description
7 NRST Reset
34 SWDIO Data I/O
37 SWCLK Clock
39 TRACESWO Trace Output
OSC
Pin Function Description
5 OSC_IN High Speed External Clock In (HSEI)
6 OSC_OUT High Speed External Clock Out (HSEO)
OSC32
Pin Function Description
3 OSC32_IN Low Speed External Clock In (LSEI)
4 OSC32_OUT Low Speed External Clock Out (LSEO)

Peripheral Pinout Diagram

OISTER Peripheral Pinout.png

Peripheral Pinout
Pin Function Alternate
1 VBAT
2 PC13
3 PC14
4 PC15
5 PH0
6 PH1
7 NRST
8 VSSA
9 VDDA
10 PA0
11 PA1 I2C1_SMBA SPI1_SCK
12 PA2 OCTOSPI1_NCS
13 PA3 OCTOSPI1_CLK
14 PA4 SPI1_NSS SPI3_NSS OCTOSPI1_NCS
15 PA5 SPI1_SCK
16 PA6 SPI1_MISO OCTOSPI1_IO3
17 PA7 I2C3_SCL SPI1_MOSI OCTOSPI1_IO2
18 PB0 SPI1_NSS OCTOSPI1_IO1
19 PB1 OCTOSPI1_IO0
20 PB2 I2C3_SMBA
21 PB10 I2C2_SCL I2C4_SCL SPI2_SCK OCTOSPI1_CLK
22 PB11 I2C2_SDA I2C4_SDA OCTOSPI1_NCS
23 VSS
24 VDD
25 PB12 I2C2_SMBA SPI2_NSS OCTOSPI_NCLK
26 PB13 I2C2_SCL SPI2_SCK
27 PB14 I2C2_SDA SPI2_MISO
28 PB15 SPI2_MOSI
29 PA8
30 PA9 SPI2_SCK
31 PA10
32 PA11 SPI1_MISO FDCAN1_RX
33 PA12 SPI1_MOSI FDCAN1_TX
34 PA13
35 VSS_2
36 VDD_2
37 PA14 I2C1_SMBA I2C4_SMBA
38 PA15 SPI1_NSS SPI3_NSS
39 PB3 SPI1_SCK SPI3_SCK
40 PB4 I2C3_SDA SPI1_MISO SPI3_MISO
41 PB5 I2C1_SMBA SPI1_MOSI SPI3_MOSI
42 PB6 I2C2_SCL I2C4_SCL
43 PB7 I2C1_SDA I2C4_SDA
44 PH3
45 PB8 I2C1_SCL FDCAN1_RX
46 PB9 I2C1_SDA SPI2_NSS FDCAN1_TX
47 VSS_3
48 VDD_3

Protocol Pinout Reference

I2C1
Pin Function Description
11 41 I2C1_SMBA System Management Bus Alert (SMBus mode)
43 46 I2C1_SDA Serial Data Line
42 45 I2C1_SCL Serial Clock Line
I2C2
Pin Function Description
21 26 I2C2_SCL Serial Clock Line
22 27 I2C2_SDA Serial Data Line
25 I2C2_SMBA System Management Bus Alert (SMBus mode)
I2C3
Pin Function Description
17 I2C3_SCL Serial Clock Line
25 I2C3_SMBA System Management Bus Alert (SMBus mode)
40 I2C3_SDA Serial Data Line
I2C4
Pin Function Description
21 42 I2C4_SCL Serial Clock Line
22 43 I2C4_SDA Serial Data Line
37 I2C4_SMBA System Management Bus Alert (SMBus mode)
SPI1
Pin Function Description
11 15 39 SPI1_SCK Serial Clock
14 18 38 SPI1_NSS Slave Select
16 32 40 SPI1_MISO Master-in, Slave-out
17 33 41 SPI1_MOSI Master-out, Slave-in
SPI2
Pin Function Description
21 26 SPI2_SCK Serial Clock
25 SPI2_NSS Slave Select
27 SPI2_MISO Master-in, Slave-out
28 SPI2_MOSI Master-out, Slave-in
SPI3
Pin Function Description
14 38 SPI3_NSS Slave Select
39 SPI3_SCK Serial Clock
40 SPI3_MISO Master-in, Slave-out
41 SPI3_MOSI Master-out, Slave-in
OCTOSPI1
Pin Function Description
12 14 OCTOSPI1_NCS Chip Select
13 21 OCTOSPI1_CLK Clock
16 OCTOSPI1_IO3 I/O Data Line
17 OCTOSPI1_IO2 I/O Data Line
18 OCTOSPI1_IO1 I/O Data Line
FDCAN
Pin Function Description
32 45 FDCAN_RX Receive Data
33 46 FDCAN_TX Transmit Data
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