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RIALTO SBC/Interfaces and Connectors/Led and buttons

< RIALTO SBC
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History
Issue Date Notes
2024/01/13 First documentation release



Contents

Led and buttons connectorEdit

DescriptionEdit

RIALTO SBC can drive up to five leds and detect two key buttons at the expansion connector J70.

J71 is a 10x1x2.54mm pin strip header connector.


 
Led and buttons connector (J60)

SignalsEdit

The following table describes the interface signals:

Pin# Pin name Alternate function GPIO Pin notes
1 VIN
2 PMIC_5V
3 3V3_AUX
4 VDD_ADC
5 GPIO1_IO01 WDOG1_WDOG_B GPIO1_IO01
6 GPIO1_IO02 I2C1_SCL GPIO1_IO02
7 GPIO1_IO03 I2C1_SDA GPIO1_IO03
8 GPIO1_IO04 UART5_TX, PWM3 GPIO1_IO04
9 GPIO1_IO05 UART5_RX, PWM4 GPIO1_IO05
10 DGND Ground

All the GPIO signals are 0-3.3V level.

Device mappingEdit

GPIOs are mapped into banks each of which contains 32 pins. They are named as GPIO<bank>_IO<pin>

Each pin can be addressed with an incremental number, calculated as follows: GPIO = 32 x (<bank> - 1) + <pin>

Device usageEdit

Under Linux the GPIOs can be manipulated su sysfs export or with the gpiod tools in Linux.