PROTEUS user manual
Issue C
68
GPIO mapping
There are three groups of GPIO pins on PROTEUS. First group is connected between
I2C GPIO expander and connector J9. The second group is connected between
SUPERIO and COM express connector (J22) and the third group is connected between
CPLD and J22.
I2C GPIO pin mapping
PCA9535 I2C GPIO expander is mapped to I2C address 0x4E/0x4F (Read/Write).
Following table shows GPIO expander port connections.
PCA9535 port number Signal Description
P0 GPIO_P0 Connected to J9
pin 1
P1 GPIO_P1 Connected to J9 pin 3
P2 GPIO_P2 Connected to J9 pin 4
P3 GPIO_P3 Connected to J9 pin 5
P4 GPIO_P4 Connected to J9 pin 6
P5 GPIO_P5 Connected to J9 pin 7
P6 GPIO_P6 Connected to J9 pin 8
P7 GPIO_P7 Connected to J9 pin 9
P8 I2C_USER_LED Connected to J6 pin 9
P9 USBPWR_02_EN# USB power enable for ports 0 and 2
P10 USBPWR_1_EN# USB power enable for port 1
P11 NC Not connected
P12 - DO NOT USE, DO NOT CHANGE
P13 - DO NOT USE, DO NOT CHANGE
P14 NC Not connected
P15 I2C_SATA_VDD_EN SATA power enable
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