Motorola DSP56301 - Manual (Page 224)

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Figure 7-8.
CRB MOD Bi
t Ope
ra
tion
SSI Control Register B (CRB)
(READ/WRITE)
Normal Mode (MOD = 0)
Serial Clock
Frame SYNC
Serial Data Data Data
Transmitter Interrupt (or DMA Request) and
Receiver Interrupt (or DMA Request) and Flags
Note: Interrupts occur and data is transferred once per frame sync.
Network Mode (MOD = 1)
Serial Clock
Frame SYNC
Transmitter Interrupts (or DMA Request) and
Slot 1 Slot 2 Slot 3 Slot 1 Slot 2 Serial Data
Receiver Interrupt (or DMA Request) and Flags Set
Note: Interrupts occur every time slot and a word may be transferred.