On-Board Devices - Cherry TIGER SOM-RK3588-Q7 User Manual

9.5 On-board Devices

9.5.1 RAM
Up to 32 GB RAM of LPDDR4X RAM
9.5.2 eMMC
Up to 128GB eMMC connected through the 8-bit wide SDIO interface on the CPU.
9.5.3 Companion Controller
An On_board microcontroller provides additional features to the CPU. The controller is an ATtiny exposed via
I2C and UPDI lines (pins UART4_TX_M2/GPIO_1_B3, UART4_RX_M2/GPIO_1_B2). As for the first controller, it
emulates standard ICs and does not need custom drivers in Linux.
Feature
RTC
Temperature sensor and fan controller
Note: Please refer to Section 7 Companion controller features for instructions on how to flash Mule ATtiny.
9.5.4 Ethernet PHY
The Texas Instruments DP83825IRMQR is connected to the CPU via RGMII and MDIO. Further connections are
shown below.
PHY signal
RESET
MDIO
MDC
LED1
LED2
TIGER SOM-RK3588-Q7 User Manual
© Cherry Embedded Solutions GmbH
Signal CPU Pin
RESET GPIO2_A3
CPU Connection
I2C
I2C
Connected to
CPU pin GPIO4_C3
CPU pin GPIO4_C5
CPU pin GPIO4_C4
Qseven GBE_LINK1000 and GBE_LINK100 and GBE_LINK (tied together)
Qseven GBE_ACT
Linux GPIO #
67
Emulated IC Qseven Pins
ISL1208 none
AMC6821 FAN_TACHOIN, FAN_PWMOUT
v1.2.0
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