BL702/704/706 Reference Manual
Table 3.3: GPIO function table 2
GPIO
Analog SWGPIO JTAG Ether_Mac QDEC
GPIO31 GPIO[31] TDO/TDI b
Table 3.4: GPIO function table 3
GPIO
SWGPIO
GPIO SWGPIO
GPIO17 pad_irrx_i,irrxgpsl=1
GPIO18 pad_irrx_i,irrxgpsl=2
GPIO19 pad_irrx_i,irrxgpsl=3
GPIO20 pad_irrx_i,irrxgpsl=4
GPIO21 pad_irrx_i,irrxgpsl=5
GPIO22 pad_irrx_i,irrxgpsl=6
GPIO23 pad_irrx_i,irrxgpsl=7
GPIO24 pad_irrx_i,irrxgpsl=8
GPIO25 pad_irrx_i,irrxgpsl=9
GPIO26 pad_irrx_i,irrxgpsl=10
GPIO27 pad_irrx_i,irrxgpsl=11
GPIO28 pad_irrx_i,irrxgpsl=12
GPIO29 pad_irrx_i,irrxgpsl=13
GPIO30 pad_irrx_i,irrxgpsl=14
GPIO31 pad_irrx_i,irrxgpsl=15
When using the IR function, you need to set GPIO as SWGPIO and set the irrxgpsl register (GPIO17~GPIO31 can
be used as IR pins)
In the above table, when the UART function is selected, only a signal of the UART is selected, and the specific function
of the pin (such as UART TX or UART RX) is not specified. The user needs to further select specific UART signals
and corresponding functions through UART_SIGX_SEL (X=0-7).
The signals that can be selected for each UART_SIGX_SEL include:
• 0 : UART0_RTS
BL702/704/706 Reference Manual 36/ 375
@2021 Bouffalo Lab
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