Platform Adaptation and Bring-Up
Jetson Nano Platform Adaptation and Bring-Up Guide DA_09361-002 | 31
SD Card (SDMMC1)
Verify proper connectivity by setting processor pins to GPIOs, if necessary, to debug.
Verify that basic SD commands operate properly.
Verify reads and writes for a variety of SD cards.
Verify that SD card insertion detection works and wakes system, if supported.
Verify that SD card write protect works, if implemented.
Verify that SD card goes to low power mode or rails are powered off when not used or
in low power system state.
Verify that signal quality is acceptable when probed at receiver end (socket or test
points near BTB connector or both for bidirectional signals). Look for excessive over/-
undershoot and glitches on signal edges and abnormal clock duty cycle.
Fan
Verify that CVM’s PWM and TACH lines connected to fan’s PWM and TACH lines.
Verify that fan speed is changed based on PWM signal pulse width.
Verify that fan’s RPM can be measured using TACH pin.
Sensors I2C: General
Verify that addresses of all I2C devices appear correctly, and no unknown ghost
devices appear.
Verify that signal quality is acceptable, including rise times of signals, when probed
at BTB connector and devices.
Sensors I2C: Touch Screen (Optional)
Verify that reads and writes on I2C or SPI to touch screen controller are functional
(reading device ID or a similar register is successful).
Verify that interrupts are generated properly.
Verify functionality of touch screen.
Verify that touch screen controller goes to lowest power mode when not used, or
system is in low power state.
PEX (Optional)
Verify proper connectivity by checking lanes.
Verify that any implemented PEX interfaces transition to the lowest power state in
Deep Sleep (LP0) and Suspend (LP1).
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