eMMC 4.5 / 5.0 works fine on the JZ144’s MMC interface (up to HS200). However, I saw:
Powering the local storage on entry-level Chromebooks. Maintenance and Longevity jz144 emmc
For HS400 performance, use 50-ohm transmission lines with 33Ω termination resistors close to the IC to reduce signal noise. JZ144 How GB eMMc Samsung - AliExpress eMMC 4
Supports 1-bit, 4-bit, or 8-bit data bus modes, operating at voltages between 1.8V and 3.3V. or 8-bit data bus modes
: For optimal stability, the exposed thermal pad should be connected to the ground plane with at least six vias to prevent thermal shutdowns. Applications and Use Cases
: Often paired with microcontrollers like the STM32H7 for robust data storage in specialized embedded systems. Repair & Sourcing Information