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Section 22 Renesas SPDIF Interface
R01UH0134EJ0400 Rev. 4.00 Page 1183 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
22.8.4 Transmitter Module Data Transfer
Once the transmitter module has left the idle state, it is ready for data transfer. Data transfer timing
can be achieved in three ways. Either the transfer is done by interrupts, DMA requests or by
polling the status register. There is a shared interrupt line (for both transmit and receive) and a
single transmitter DMA request line.
Figure 22.5 shows a data transfer with an interrupt for the transmitter.
Start
Idle
Wait for interrupt
Enter idle state?
No
Yes
Set control bit enabled
(TCBI)
Load left or right audio
channel data
Set control bit disabled
(TCBI)
Figure 22.5 Transmitter Data Transfer Flow Diagram - Interrupt Driven