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OI!STER

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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 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.

A full pinout and additional documentation is currently under development.

OISTER-DIAG-30.png
OISTER-30.png
OISTER-PCB-30.png



Pinout

Debug Pinout
OISTER Pinout DBG-50.png
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 USART2_RX USART3_RTS UART4_RTS
39 PB3 JTDO TRACESWO USART1_RTS
40 PB4 NJTRST USART1_CTS UART5_RTS
41 PB5 USART1_CK UART5_CTS
42 PB6 USART1_TX
43 PB7 USART1_RX UART4_CTS
44 PH3 BOOT0
45 PB8
46 PB9
47 VSS_3
48 VDD_3