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
| LPUART/USART/UART/SWD/JTAG/USB/OSC/OSC32 Pinout
|
|
Debug Pinout Table
| 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
|
USART2_CTS
|
| 11
|
PA1
|
UART4_RX
|
USART2_RTS
|
| 12
|
PA2
|
LPUART1_TX
|
USART2_TX
|
| 13
|
PA3
|
LPUART1_RX
|
USART2_RX
|
| 14
|
PA4
|
USART2_CK
|
| 15
|
PA5
|
| 16
|
PA6
|
LPUART1_CTS
|
USART3_CTS
|
| 17
|
PA7
|
| 18
|
PB0
|
LED1
|
USART3_CK
|
| 19
|
PB1
|
LED2
|
LPUART1_RTS
|
USART3_RTS
|
| 20
|
PB2
|
| 21
|
PB10
|
LPUART1_RX
|
USART3_TX
|
| 22
|
PB11
|
LPUART1_TX
|
USART3_RX
|
| 23
|
VSS
|
| 24
|
VDD
|
| 25
|
PB12
|
USART3_CK
|
LPUART1_RTS
|
| 26
|
PB13
|
USART3_CTS
|
LPUART1_CTS
|
| 27
|
PB14
|
USART3_RTS
|
| 28
|
PB15
|
| 29
|
PA8
|
USART1_CK
|
| 30
|
PA9
|
USART1_TX
|
| 31
|
PA10
|
USART1_RX
|
| 32
|
PA11
|
USART1_CTS
|
USB_DM
|
| 33
|
PA12
|
USART1_RTS
|
USB_DP
|
| 34
|
PA13
|
JTMS
|
SWDIO
|
USB_NOE
|
| 35
|
VSS_2
|
| 36
|
VDD_2
|
| 37
|
PA14
|
JTCK
|
SWCLK
|
| 38
|
PA15
|
JTDI
|
NC
|
USART2_RX
|
USART3_RTS
|
UART4_RTS
|
| 39
|
PB3
|
JTDO
|
TRACESWO
|
USART1_RTS
|
| 40
|
PB4
|
NJTRST
|
USART1_CTS
|
| 41
|
PB5
|
USART1_CK
|
| 42
|
PB6
|
USART1_TX
|
| 43
|
PB7
|
USART1_RX
|
UART4_CTS
|
| 44
|
PH3
|
BOOT0
|
| 45
|
PB8
|
| 46
|
PB9
|
| 47
|
VSS_3
|
| 48
|
VDD_3
|
Protocol Pinout Reference
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
|
| 33
|
39
|
USART1_RTS
|
Request To Send
|
USART2
| Pin
|
Function
|
| 10
|
|
USART2_CTS
|
| 11
|
|
USART2_RTS
|
| 12
|
|
USART2_TX
|
| 13
|
38
|
USART2_RX
|
| 14
|
|
USART2_CK
|
USART3
| Pin
|
Function
|
| 16
|
26
|
USART3_CTS
|
| 18
|
25
|
USART3_CK
|
| 19
|
27
|
USART3_RTS
|
| 21
|
|
USART3_TX
|
| 22
|
|
USART3_RX
|
UART4
| Pin
|
Function
|
| 10
|
UART4_TX
|
| 11
|
UART4_RX
|
| 38
|
UART4_RTS
|
| 43
|
UART4_CTS
|
SWD
| Pin
|
Function
|
| 7
|
NRST
|
| 34
|
SWDIO
|
| 37
|
SWCLK
|
| 38
|
NC
|
| 39
|
TRACESWO
|
JTAG
| Pin
|
Function
|
| 34
|
JTMS
|
| 37
|
JTCK
|
| 38
|
JTDI
|
| 39
|
JTDO
|
| 40
|
NJTRST
|
USB
| Pin
|
Function
|
| 32
|
USB_DM
|
| 33
|
USB_DP
|
| 34
|
USB_NOE
|
OSC
| Pin
|
Function
|
| 5
|
OSC_IN
|
| 6
|
OSC_OUT
|
OSC32
| Pin
|
Function
|
| 3
|
OSC32_IN
|
| 4
|
OSC32_OUT
|
Peripheral Pinout Diagram
| I2C/SPI/OCTOSPI/FDCAN/SDMMC Pinout
|
|
Peripheral Pinout Table
| Pin
|
Function
|
Alternate Function
|
| 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
|
OCTOSPI1_DQS
|
| 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
|
OCTOSPI1_DQS
|
| 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
|
OCTOSPI_NCLK
|
| 42
|
PB6
|
I2C2_SCL
|
I2C4_SCL
|
| 43
|
PB7
|
I2C1_SDA
|
I2C4_SDA
|
| 44
|
PH3
|
| 45
|
PB8
|
I2C1_SCL
|
FDCAN1_RX
|
SDMMC1_CKIN
|
SDMMC1_D4
|
| 46
|
PB9
|
I2C1_SDA
|
SPI2_NSS
|
FDCAN1_TX
|
SDMMC1_CDIR
|
SDMMC1_D5
|
| 47
|
VSS_3
|
| 48
|
VDD_3
|
Protocol Pinout Reference
I2C1
| Pin
|
Function
|
| 11
|
41
|
I2C1_SMBA
|
| 43
|
46
|
I2C1_SDA
|
| 42
|
45
|
I2C1_SCL
|
I2C2
| Pin
|
Function
|
| 21
|
26
|
I2C2_SCL
|
| 22
|
27
|
I2C2_SDA
|
| 25
|
|
I2C2_SMBA
|
I2C3
| Pin
|
Function
|
| 17
|
I2C3_SCL
|
| 25
|
I2C3_SMBA
|
| 40
|
I2C3_SDA
|
I2C4
| Pin
|
Function
|
| 21
|
42
|
I2C4_SCL
|
| 22
|
43
|
I2C4_SDA
|
| 37
|
|
I2C4_SMBA
|
SPI1
| Pin
|
Function
|
| 11
|
15
|
39
|
SPI1_SCK
|
| 14
|
18
|
38
|
SPI1_NSS
|
| 16
|
32
|
40
|
SPI1_MISO
|
| 17
|
33
|
41
|
SPI1_MOSI
|
SPI2
| Pin
|
Function
|
| 21
|
26
|
SPI2_SCK
|
| 25
|
|
SPI2_NSS
|
| 27
|
|
SPI2_MISO
|
| 28
|
|
SPI2_MOSI
|
SPI3
| Pin
|
Function
|
| 14
|
38
|
SPI3_NSS
|
| 39
|
|
SPI3_SCK
|
| 40
|
|
SPI3_MISO
|
| 41
|
|
SPI3_MOSI
|
OCTOSPI1
| Pin
|
Function
|
| 11
|
20
|
OCTOSPI1_DQS
|
| 12
|
14
|
OCTOSPI1_NCS
|
| 13
|
21
|
OCTOSPI1_CLK
|
| 16
|
|
OCTOSPI1_IO3
|
| 17
|
|
OCTOSPI1_IO2
|
| 18
|
|
OCTOSPI1_IO1
|
| 25
|
41
|
OCTOSPI1_NCLK
|
FDCAN
| Pin
|
Function
|
| 32
|
FDCAN_RX
|
| 33
|
FDCAN_TX
|
SDMMC
| Pin
|
Function
|
| 45
|
SDMMC1_CKIN
|
| 46
|
SDMMC_CDIR
|
| 45
|
SDMMC_D4
|
| 46
|
SDMMC_D5
|
