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LTP5901-IPM, how should we tie nonuse UART input pins?

Question asked by Euglena on Jul 2, 2018

Please let me ask how we should treat nonuse UART pins.

 

I found following description in the LTP5901-IPM (Mote) data sheet.

When UART (Pin No.57-62) is not used, whether should we use pull-up or pull-down, for following three input pins?

If there are recommended resister value, could you please let me know?

 

When using pull-up resister, current from it is consumed, I am concerned.

I would like to reduce the current consumption as much as possible.

 

LTP5901-IPM/LTP5902-IPM / SmartMesh IP Node 2.4GHz 802.15.4e Wireless Mote Module

http://www.analog.com/media/en/technical-documentation/data-sheets/59012ipmfa.pdf

Page 22

No.57 UART_RX_RTSn

No.59 UART_RX

No.61 UART_TX_CTSn

Note 14: These inputs are always enabled and must be driven or pulled to a valid state to avoid leakage.

 

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