AM2432: If MCU_RESETz and RESET_REQz are not used, can these pins be left open (unconnected)?

Hideaki Matsumoto

Genius 9050 points

Part Number: AM2432

Hi,

I have a question about unused pin treatment.

If MCU_RESETz and RESET_REQz are not used, can these pins be left open (unconnected)?

Thanks and regards,
Hideaki

over 2 years ago

0 Ralph Jacobi over 2 years ago

TI__Guru*** 135355 points

Hello Hideaki-san,

Internal pull-up can be used to hold a valid logic high level if no PCB signal trace is connected to the ball.

Table 6-1. Pin Attributes shows that each of these pins are listed as "On / Off / Up" during and on reset which means 'RX buffer enabled, TX buffer disabled, Internal Pull-up enabled'. So on reset they will be pulled high and therefore can be left unconnnected if unsed.

See Section 6.4 Pin Connectivity Requirements of the Device Datasheet for further details on the recommended connections.

Best Regards,

Ralph Jacobi

+1 Nilabh Anand over 2 years ago in reply to Ralph Jacobi

TI__Mastermind 44544 points

In addition to Ralph answer, you could also refer to: e2e.ti.com/.../am2432-how-to-handle-mcu_resetz-and-reset_reqz-during-power-sequencing

Arm-based microcontrollers

Arm-based microcontrollers forum

AM2432: If MCU_RESETz and RESET_REQz are not used, can these pins be left open (unconnected)?