Motorola DSP56303 User Manual page 174

Serial Clock
Frame SYNC
Serial Data
Data
NOTE: Interrupts occur and data is transferred once per frame sync.
Serial Clock
Frame SYNC
Slot 1
Serial Data
NOTE: Interrupts occur every time slot and a word may be transferred.
Normal Mode (MOD = 0)
Transmitter Interrupt (or DMA Request) and
Receiver Interrupt (or DMA Request) and Flags
Network Mode (MOD = 1)
Transmitter Interrupts (or DMA Request) and
Slot 2
Receiver Interrupt (or DMA Request) and Flags Set
Data
Slot 3 Slot 1
SSI Control Register B (CRB)
(READ/WRITE)
Slot 2