Samsung S3C2440A - Manual (Page 506)

AC97 CONTROLLER S3C2440A RISC MICROPROCESSOR
24-4
OPERATION FLOW CHART
System reset or Cold reset
Set GPIO and Release
INTMSK/SUBINTMSK bits
Enable Codec Ready interrupt
Codec Ready interrupt ?
Time out condition ?
Disable Codec Ready interrupt
DMA operation or
PIO (Interrupt or Polling) operation
Yes
No
Controller off
No
Figure 24-3 AC97 Operation Flow Chart