Texas Instruments DRA72 Series, User Manual, Page: 20 / 39

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20 SPRUIB9 – December 2016
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DRA72x EVM CPU Board User's Guide
3.22 IO Expander List
Table 17. I/O Expander Map
Device Slave Address I2C I/F
Expander
IO Netname Description
EXP1
0b0010 000
(0x20)
I2C1
INT# PCF8575_INT Interrupt output to SoC
P0 TS_LCD_GPIO1 Press Button Switch 1
P1 TS_LCD_GPIO2 Press Button Switch 2
P2 TS_LCD_GPIO3 Press Button Switch 3
P3 TS_LCD_GPIO4 Press Button Switch 4
P4 USER_LED1 User LED 1
P5 USER_LED2 User LED 2
P6 USER_LED3 User LED 3
P7 USER_LED4 User LED 4
P10 EXP_ETH0_RSTn RGMII0 Reset
P11 EXP_ETH1_RSTn RGMII1 Reset
P12 USB1-VBUS_OCN USB1 Over Current Indication
P13 USB2-VBUS_OCN USB2 Over Current Indication
P14 PCI_SW_RESETn PCI Interface SW Reset
P15 CON_LCD_PWR_DN LCD Board Master power enable
P16 Open
P17 TMP102_ALERT Temperature Sensor Alarm
EXP2
0b0010 001
(0x21)
I2C1
INT# PCF8575_INT Interrupt output to SoC
P0
SEL_GPMC_AD_VID_S0 MUX out control signal for GPMC Vs VOUT3B
vs VIN1A
P1 USB1_ID USB1 ID PIN
P2 USB2_ID USB2 ID PIN
P3 SEL_I2C3_CAN2 MUX out control signal for I2C3 Vs DCAN2
P4 SEL_ENET_MUX_S0 MUX out control signal for RGMII0 Vs VIN
P5 MMC_PWR_ON Power on regulator to MMC card
P6
NOR_ALT_ADDRn MUX out control signals for alternate location of
GPMC control signals
P7
SEL_GPMC_AD_VID_S2 MUX out control signal for GPMC vs VOUT3B
vs VIN1A
P10 NAND_BOOTn NAND boot Chip select enable signal
P11 NOR_BOOTn NOR boot Chip select enable signal
P12 MMC2_BOOT MUX out control signal for GPMC Vs MMC2
P13 QSPI_SELn Not used, as QSPI is enabled with resistor mux
P14
UART_SEL1_3 MUX out control signal for UART1 vs UART for
terminal access
P15 MCASP1_ENn COM8 interface level shifter enable signal
P16 SEL_UART3_SPI2 MUX out control signal for UART3 Vs SPI2
P17 Open