STCOM Datasheet, PDF (39/58 Pages) STMicroelectronics – Powerline communication and application system-on-chip

STCOM
Pinout and pin description
2.2
GPIOs multiplexing scheme
In the STCOM, peripherals are connected to I/Os through a multiplexer. At a time one single
peripheral can control the I/Os. In this way, there is no conflict between peripherals sharing
the same I/O pins.
Thanks to a set of configuration registers, the user can select one of the 4 possible alternate
functions for each pin as described in Table 8.
Pin name
GPIO00_0
GPIO00_1
GPIO00_2
GPIO00_3
GPIO00_4
GPIO00_5
GPIO00_6
GPIO00_7
GPIO01_0
GPIO01_1
GPIO01_2
GPIO01_3
GPIO01_4
GPIO01_5
GPIO01_6
GPIO01_7
GPIO02_0
GPIO02_1
GPIO02_2
GPIO02_3
GPIO02_4
GPIO02_5
GPIO02_6
GPIO02_7
GPIO03_0
GPIO03_1
GPIO03_2
GPIO03_3
GPIO03_4
Table 8. GPIOs multiplexing scheme
Selection: 000
Selection: 001
Selection: 010
USART0_RTS
FSMC_PCAD_20
USART0_CTS
SPI1_SS
SPI1_MOSI
SPI1_MISO
AT1_BKIN
AT1_CH_1
AT1_CH_2
FSMC_PCAD_19
FSMC_PCAD_18
FSMC_PCAD_17
FSMC_PCAD_16
SPI1_SCLK
AT1_CH_3
FSMC_PCAD_15
I2C0_SDA
I2C0_SCL
I2C0_SMBA
USART1_TXD
AT1_CH_4
AT1_CHN_1
AT1_CHN_2
AT1_CHN_3
FSMC_PCAD_14
FSMC_PCAD_13
FSMC_PCAD_12
FSMC_PCAD_11
USART1_RXD
USART1_RTS
USART1_CTS
I2C1_SDA
AT1_ETR
CAN0_TX
CAN0_RX
CAN1_TX
FSMC_PCAD_10
FSMC_PCAD_9
FSMC_PCAD_8
FSMC_PCAD_7
I2C1_SCL
CAN1_RX
FSMC_PCAD_6
AT0_ETR
AT0_CH_4
AT0_CHN_3
AT0_CH_3
I2C2_SMBA
I2C2_SDA
I2C2_SCL
FSMC_PCAD_5
FSMC_PCAD_4
FSMC_PCAD_3
FSMC_PCAD_2
AT0_CHN_2
AT0_CH_2
AT0_CHN_1
AT0_CH_1
FSMC_PCAD_1
FSMC_PCAD_0
FSMC_PCOEn
FSMC_PCWEn
AT0_BKIN
FSMC_Lbar
SPI2_MOSI
SPI2_MISO
SPI2_SCLK
SPI2_SS
USART3_TXD
USART3_RXD
USART3_RTS
USART3_CTS
FSMC_PCDA_15
FSMC_PCDA_14
FSMC_PCDA_13
FSMC_PCDA_12
SPI3_MOSI
FSMC_PCDA_11
Selection: 011
USART0_SCLK
USART1_SCLK
I2C1_SMBA
USART4_RTS
USART4_CTS
USART4_RXD
USART4_TXD
USART4_SCLK
USART3_SCLK
DocID028515 Rev 1
39/58
58