STMicroelectronics B-G474E-DPOW1, Руководство пользователя

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Pin
number
Description Signal assignment
Pin
number
Description Signal assignment
B3 TX2_N - A10 RX2_N -
B2 TX2_P - A11 RX2_P -
B1 GND GND A12 GND GND
14.2 CN1 debug connector
Different debug connectors are used according to Discovery board revisions :
•
An STDC14 14-pin connector is soldered on CN1 for BG474EDPOW1$AT1 finish good (Based on MB1428-
G474RE-B01 board revision)
• A MIPI10 10-pin connector is soldered on CN1 for BG474EDPOW1$AT2 finish goods and above (Based on
all other board revisions)
14.2.1 CN1 STDC14 debug connector
The STDC14 debug connector is implemented to program and debug the STM32G474RET6 microcontroller. The
SWD protocol must be used by default.
To use the STDC14 connector to debug STM32G474RET6, it is mandatory to place a jumper on JP6 to connect
STLK NRST to GND. This sets the STLINK-V3E MCU in a high impedance state.
In case the user wants to isolate completely the STDC14 debug connector from STLINK-V3E MCU, SW1 octal
mechanical switch must be set accordingly, and JP7 must be removed. This also disconnects STM32G474RET6
microcontroller from STLINK-V3E.
Figure 22. CN1 STDC14 debug connector
If needed, a MIPI10 female connector can be plugged into CN1 STDC14 connector, if pins 1, 2, 13, and 14 are
bent or cut. Alternatively, a MIPI10 connector can be soldered on the CN1 footprint in place of STDC14.
Table 14. STDC14 connector
Pin
number
Description Assignment
Pin
number
Description Assignment
1 - - 2 - -
3 3V3 power 3V3 4 SWDIO / JTMS T_SWDIO (PA13)
5 GND GND 6 SWCLK / JTCK T_SWCLK (PA14)
7 KEY GND 8 SWO / JTDO T_SWO (PB3)
9 - - 10 JTDI T_JTDI (PA15)
11 GNDDetect 100 Ω pull-down 12 RESET / JTRST T_NRST (PG10)
UM2577
CN1 debug connector
UM2577 - Rev 2
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