CYW20732A0
Table 8. Pin Descriptions (Cont.)
Pin Number Pin Name
15
I/O
Power Domain
Description
Data signal for an external I2C device.
Alternative function:
SDA
I/O, PU VDDM
■ SPI_1: MOSI (master only)
■ GPIO0
■ CTS
16
SCL
I/O, PU VDDM
Clock signal for an external I2C device.
Alternative function:
■ SPI_1: SPI_CLK (master only)
■ GPIO1
■ RTS
LDO Regulator Power Supplies
2
3
LDOIN
I
N/A
N/A
Battery input supply for the LDO
LDO output
LDOOUT
O
Table 9. GPIO Pin Descriptionsa
Default Di- After POR Power Do-
rection State main
Pin Number
19
Pin Name
P0
Alternate Function Description
Input Input VDDO
■ GPIO: P0
floating
■ A/D converter input
■ Peripheral UART: puart_tx
■ SPI_2: MOSI (master and slave)
■ IR_RX
■ 60Hz_main
■ Not available during TMC=1
■ GPIO: P1
20
P1
Input
Input
floating
VDDO
■ A/D converter input
■ Peripheral UART: puart_rts
■ SPI_2: MISO (master and slave)
■ IR_TX
21
22
P3
P2
Input
Input
Input
floating
VDDO
VDDO
■ GPIO: P3
■ Peripheral UART: puart_cts
■ SPI_2: SPI_CLK (master and slave)
■ GPIO: P2
Input
floating
■ Peripheral UART: puart_rx
■ SPI_2: SPI_CS (slave only)
■ SPI_2: SPI_MOSI (master only)
Document Number: 002-14837 Rev. *L
Page 16 of 35
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