37.8.1 Control A

Name: CTRLA
Offset: 0x00
Reset: 0x00000000
Property: -

Control A

Bit 3130292827262524 
        LASTXFER 
Access W 
Reset 0 
Bit 2322212019181716 
          
Access  
Reset  
Bit 15141312111098 
          
Access  
Reset  
Bit 76543210 
       ENABLESWRST 
Access WW 
Reset 00 

Bit 24 – LASTXFER Last Transfer

0: No effect.

1: The chip select will be de-asserted after the character written in TD has been transferred.

Bit 1 – ENABLE Enable

Writing a '0' to this bit disables the QSPI.

Writing a '1' to this bit enables the QSPI to transfer and receive data.

As soon as ENABLE is reset, QSPI finishes its transfer.

All pins are set in input mode and no data is received or transmitted.

If a transfer is in progress, the transfer is finished before the QSPI is disable.

Bit 0 – SWRST Software Reset

Writing a '0' to this bit has no effect.

Writing a '1' to this bit resets the QSPI. A software-triggered hardware reset of the QSPI interface is performed.

DMAC channels are not affected by software reset.