
27 RSB-4210 User Manual
Chapter 2 H/W Installation
2.2.24 Pin Header for 20x pins GPIO (GPIO1)
GPIO1 is extended for 20x pins 3.3V TTL Level GPIO. GPIO1~4 pins are coming
from CPU directly while GPIO5~20 pins are extended from IC PCA9555. The pin
assignment is shown as below.
Figure 2.29 Pin Header for GPIO
Pin Description Pin Description
1 GND 2 SPI_IRQ
3 I2C1_SCL 4 SPI_MISO
5 I2C1_SDA 6 SPI_MOSI
7 I2C3_SCL 8 SPI_CS0
9 I2C3_SDA 10 SPI_CLK
11 DIO_3V3 12 DIO_3V3
Pin Description Pin Description
1 GND 2 DIO_3V3
3 IMX_GPIO1 4 IMX_GPIO2
5 IMX_GPIO3 6 IMX_GPIO4
7 EX_GPIO_5 8 EX_GPIO_6
9 EX_GPIO_7 10 EX_GPIO_8
11 EX_GPIO_9 12 EX_GPIO_10
13 EX_GPIO_11 14 EX_GPIO_12
15 EX_GPIO_13 16 EX_GPIO_14
17 EX_GPIO_15 18 EX_GPIO_16
19 EX_GPIO_17 20 EX_GPIO_18
21 EX_GPIO_19 22 EX_GPIO_20
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