Cirrus Logic CS4970x4 - Manual (Page 53)

2-7 Copyright 2013 Cirrus Logic, Inc. DS810UM6
SPI Port
CS4953x4/CS4970x4 System Designer’s Guide
5. If SCP1_IRQ is still low after 4 bytes, then proceed to Step 4 and read another 4 bytes out of the
CS4953x4/CS4970x4 Slave.
6. If SCP1_IRQ is high, the SCP1_CS line of CS4953x4/CS4970x4 should be driven high to end the
read transaction.