跳至主要內容
Knowledgebase
Home
Renesas Electronics Taiwan - Knowledgebase

How do I control SSL polarity?

Latest Updated:01/23/2014

Question:

How do I control SSL polarity?

Answer:

SSL polarity is controlled according to the combination of the RSPI master/slave mode select bit (SPCR.MSTR) and the RSPI slave select polarity register (SSLP).

The function of the SSLP register in each mode is as follows.
- Master mode
- In single-master mode
SSL0-3 are output.
- In multi-master mode
SSL0 is input.
SSL1-3 are output.
- Slave mode
SSL0 is input.
SSL1-3 are unused.

Suitable Products
RX630
RX63N, RX631
RX210