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UM1902
5.9
RS232 and IrDA
RS232 and IrDA communication is supported by D-type 9-pins RS232 connector CN7, and
IrDA transceiver U1, which is connected to USART1 of the STM32F746NGH6
microcontroller on STM32746G-EVAL evaluation board. The signal Bootloader_RESET and
Bootloader_BOOT are added on RS232 connector CN7 for ISP support.
USART1 of the STM32F746NGH6 microcontroller is shared with RS232/IrDA and ST-
LINK/V2-1 controller. Its communication can be changed by setting JP14 and JP20.
Jumper
JP14
JP20
JP7
5.10
MicroSD card
The 2-Gbyte (or more) microSD card connected to SDMMC1 port of the STM32F746NGH6
microcontroller, is available on the board. Detection of the microSD card is managed by
MFX GPIO15.
All manuals and user guides at all-guides.com
Table 8. USART1 related jumpers
USART1_RX is connected to RS232/IrDA when JP14 is set as shown to the right
(Default setting):
USART1_RX is connected to ST-LINK/V2-1 controller's USART_TX when JP14 is
set as shown to the right:
USART1_TX is connected to RS232/IrDA when JP20 is set as shown to the right
(Default setting):
USART1_TX is connected to ST-LINK/V2-1 controller's USART_RX when JP20 is
set as shown to the right:
USART1_RX is connected to RS232 transceiver and RS232 communication is
enabled when JP14 is set to pin1-2 and JP7 is set as shown to the right (Default
setting):
USART1_RX is connected to IrDA transceiver and IrDA communication is enabled
when JP14 is set to pin1-2 and JP7 is set as shown to the right:
DocID027916 Rev 2
Hardware layout and configuration
Description
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