ST STM32U575I-EV, Руководство пользователя, Страница: 17 / 105

Table 7 describes the STDC14/MIPI
‑
10 connector pinout compatible with both STDC14 and MIPI-10 interfaces.
Table 7. CN18 STDC14/MIPI
‑
10 debug connector pinout
MIPI
‑
10 pin
STDC14
pin
STM32 pin Board function
- 1 - Reserved
- 2 - Reserved
1 3 VDD Target VDD
2 4 PA13
JTMS_SWDIO: Target SWDIO using SWD protocol or Target JTMS using JTAG
protocol
3 5 GND Ground
4 6 PA14
JTCK_SWCLK: Target SWCLK using SWD protocol or Target JTCK using JTAG
protocol
5 7 GND Ground
6 8 PB3
JTDO_SWO: Target SWO using SWD protocol or Target JTDO using JTAG
protocol
7 9 - NC
8 10 PA15
JTDI: Not used by SWD protocol, Target JTDI using JTAG protocol, only for
external tools
9 11 - GNDDetect: GND detect for plug indicator, used on SWD and JTAG neither
10 12 NRST NRST: Target NRST using SWD protocol or Target JTMS using JTAG protocol
- 13 PA10
T_VCP_RX: Target RX used for VCP and connected to STLK_VCP_TX (UART
supporting the bootloader)
- 14 PA9
T_VCP_TX: Target TX used for VCP and connected to STLK_VCP_RX (UART
supporting the bootloader)
Two SN74LVC2T45DCUT level shifters are used on VCP and SWD interface to offer a debug capability with MCU
powered by 1V8. One level shifter is used for the signal from target MCU (1V8) to STLINK-V3E (3V3).
1.
U27 used for T_VCP_TX / STLK_VCP_RX signal
2. U30 used for T_SWDIO and T_SWO signal
7.4.2 I/O restriction to other features
Caution: Due to the sharing of some I/Os of STM32U575AII6Q by multiple peripherals, the following limitations apply in
using the STDC14 features:
•
By default, only a MIPI-10 connector is present on the CN18 footprint.
• The STDC14 function is mainly limited to the SWD function, the TDI and TDO functions are optional.
• The STDC14 function JTDI cannot be operated simultaneously with the UCPD function.
• The STDC14 function JTDO/SWO cannot be operated simultaneously with the audio MEMS function.
STM32U575I-EV
STDC14/MIPI
‑
10 connector
UM2854 - Rev 1
page 17/105