I/O Expander Map; Nand_Bootn; Nor_Bootn; Mmc2_Boot - Texas Instruments DRA72 Series User Manual

Hardware
3.22 IO Expander List
Device Slave Address
0b0010 000
EXP1
(0x20)
0b0010 001
EXP2
(0x21)
20
DRA72x EVM CPU Board User's Guide
Table 17. I/O Expander Map
Expander
I2C I/F IO Netname
INT# PCF8575_INT
P0 TS_LCD_GPIO1
P1 TS_LCD_GPIO2
P2 TS_LCD_GPIO3
P3 TS_LCD_GPIO4
P4 USER_LED1
P5 USER_LED2
P6 USER_LED3
I2C1 P7 USER_LED4
P10 EXP_ETH0_RSTn
P11 EXP_ETH1_RSTn
P12 USB1-VBUS_OCN
P13 USB2-VBUS_OCN
P14 PCI_SW_RESETn
P15 CON_LCD_PWR_DN
P16
P17 TMP102_ALERT
INT# PCF8575_INT
SEL_GPMC_AD_VID_S0
P0
P1 USB1_ID
P2 USB2_ID
P3 SEL_I2C3_CAN2
P4 SEL_ENET_MUX_S0
P5 MMC_PWR_ON

NOR_ALT_ADDRn

P6
I2C1 SEL_GPMC_AD_VID_S2
P7
P10

NAND_BOOTn

P11

NOR_BOOTn

P12

MMC2_BOOT

P13 QSPI_SELn

UART_SEL1_3

P14
P15

MCASP1_ENn

P16 SEL_UART3_SPI2
P17
Copyright © 2016, Texas Instruments Incorporated
Description
Interrupt output to SoC
Press Button Switch 1
Press Button Switch 2
Press Button Switch 3
Press Button Switch 4
User LED 1
User LED 2
User LED 3
User LED 4
RGMII0 Reset
RGMII1 Reset
USB1 Over Current Indication
USB2 Over Current Indication
PCI Interface SW Reset
LCD Board Master power enable
Open
Temperature Sensor Alarm
Interrupt output to SoC
MUX out control signal for GPMC Vs VOUT3B
vs VIN1A
USB1 ID PIN
USB2 ID PIN
MUX out control signal for I2C3 Vs DCAN2
MUX out control signal for RGMII0 Vs VIN
Power on regulator to MMC card
MUX out control signals for alternate location of
GPMC control signals
MUX out control signal for GPMC vs VOUT3B
vs VIN1A
NAND boot Chip select enable signal
NOR boot Chip select enable signal
MUX out control signal for GPMC Vs MMC2
Not used, as QSPI is enabled with resistor mux
MUX out control signal for UART1 vs UART for
terminal access
COM8 interface level shifter enable signal
MUX out control signal for UART3 Vs SPI2
Open
SPRUIB9 – December 2016
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