Datasheet

165
4341H–MP3–10/07
AT8xC51SND2C/MP3B
Figure 19-12. Slave SPI Interrupt Policy Flows
SPI Initialization
Interrupt Policy
Enable interrupt
ESPI =1
SPI Interrupt
Service Routine
Select Slave Mode
MSTR = 0
Select Format
program CPOL & CPHA
Enable SPI
SPEN = 1
Get Status
Read SPSTA
Prepare New Transfer
write data in SPDAT
Get Data Received
read SPDAT
Prepare Transfer
write data in SPDAT