On-Board Devices - Cherry RINGNECK SOM-PX30-uQ7 User Manual

12.3.13 Power
Signal Nominal
Input
VCC 5V
VCC_RTC 3V

12.4 On-board Devices

12.4.1 Power-Manager
The Rockchip RK809-1 is connected to the CPU via I2C:
12.4.2 DDR4
• Up to 4GB RAM of DDR4-1600
12.4.3 eMMC
• eMMC connected through the 8-bit wide SDIO interface EMMC_D on the CPU.
12.4.4 Companion Controller 1
Controller features are implemented by emulating standard ICs. Feature configuration is provided in a table
below.
Feature
RTC
Temperature sensor and fan controller
CAN
See also Section 10.1 Companion Controller 1 (STM32).
RINGNECK SOM-PX30-uQ7 User Manual
© Cherry Embedded Solutions GmbH
Description
Main supply for the module
Backup supply for the RTC. If not used it can be left unconnected. Typical cur-
rent: 1.4uA
RK809-1 Pin Function
1 SCL
2 SDA
Signal CPU Pin
RESET GPIO1_B3
CPU Connection
I2C
I2C
USB
CPU Pin
I2C0_SCL_u (ball R21)
I2C0_SDA_u (ball M21)
Linux GPIO #
43
Emulated IC Qseven Pins
ISL1208 none
AMC6821 FAN_TACHOIN, FAN_PWMOUT
UCAN CAN0_TX, CAN0_RX
v1.3.1
Page 47