Reference Manual

Hardware Reference Manual
Version 1.0 - 65 - eInfochips Confidential
6.3.20 Expansion Connector
Different signals from SBC module are brought to IO card on 20 pin Female Headers (J4, J8).
IO Card has I2C base GPIO expander chip and its signal came on connector J4.
User can interface other I2S based peripherals to SBC module through connector J8.
Figure 32 – IO Card Expansion Header (J4)
Pinout specification of J4 is given below,
Pin Number
Net Name
Pin Function
J4.1
VCC_1V8
1.8V Supply
J4.2
VCC_3V3
3.3V Supply
J4.3
GND
Ground
J4.4
GND
Ground
J4.5
GND
Ground
J4.6
GND
Ground
J4.7
IOE_GPIO_1
GPIO -1 Pin
J4.8
IOE_GPIO_2
GPIO -2 Pin
J4.9
IOE_GPIO_3
GPIO -3 Pin
J4.10
IOE_GPIO_4
GPIO -4 Pin
J4.11
IOE_GPIO_5
GPIO -5 Pin
J4.12
IOE_GPIO_6
GPIO -6 Pin
J4.13
IOE_GPIO_7
GPIO -7 Pin
J4.14
IOE_GPIO_9
GPIO -9 Pin
J4.15
IOE_GPIO_11
GPIO -11 Pin
J4.16
IOE_GPIO_10
GPIO -10 Pin
J4.17
GPIO_28_1
GPIO -28 Pin
J4.18
IOE_GPIO_12
GPIO -12 Pin
J4.19
LPI_GPIO_16
GPIO -16 Pin
J4.20
LPI_GPIO_17
GPIO -17 Pin
Table 30: IO Card Expansion Header (20) Pinout