8.6 CN21 TAG connector
The CN21 TAG connector footprint is used to connect STM32H735IGK6U microcontroller for programming or
debugging the board.
Figure 15. CN21 TAG connector
Table 17. CN21 TAG connector pinout
Pin number Description Pin number Description
1 VDD (3V3) 10 NRST (PH3)
2 SWDIO / JTMS (PA13) 9 NJTRST (PB4)
3 GND 8 JTDI (PA15)
4 SWCLK / JTCK (PA14) 7 NC
5 GND 6 SWO / JTDO (PB3)
8.7 CN20 audio connector
The 2x10-male-pin 1.27 mm-pitch audio connector, 20021311-00020T4LF from AMPHENOL FCI, is used for
audio MEMS expansion daughterboard using the DFSDM interface. The reference to be used is the MB1299
MEMS microphones daughterboard. The MB1299 embeds five digital MEMS microphones MP34DT01TR-M from
STMicroelectronics.
Figure 16. CN20 audio connector
Table 18. CN20 audio connector pinout
Pin number Function / MCU port Pin number Function / MCU port
1 GND 2 3V3
3 DFSDM1_CKOUT (PE9) 4 DFSDM1_CKOUT (PE9)
5 DFSDM1_DATIN4 (PE10) 6 DFSDM1_DATIN2 (PE7)
7 DFSDM_DATIN6 (PF13) 8 NC
9 NC 10 DETECTn (PD1)
11 NC 12 MEMS_LED (PG8)
UM2679
CN21 TAG connector
UM2679 - Rev 1
page 24/42
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