SH7619 Datasheet, PDF (518/836 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7619 Series

Section 16 Serial I/O with FIFO (SIOF)
Control by Secondary FS (Slave Mode 2): The CODEC normally outputs the SIOFSYNC signal
as synchronization pulse (FS). In this method, the CODEC outputs the secondary FS specific to
the control data transfer after 1/2 frame time has been passed (not the normal FS output timing) to
transmit or receive control data. This method is valid for SIOF slave mode. The following
summarizes the control data interface procedure by the secondary FS.
• Transmit normal transmit data of LSB = 0 (the SIOF forcibly clears 0).
• To execute control data transmission, send transmit data of LSB = 1 (the SIOF forcibly set to 1
by writing SITCDR).
• The CODEC outputs the secondary FS.
• The SIOF transmits or receives (stores in SIRCDR) control data (data specified by SITCDR)
synchronously with the secondary FS.
Figure 16.8 shows an example of the control data interface timing by the secondary FS.
1/2 frame
1 frame
1/2 frame
SIOFSCK
SIOFSYNC
SIOFTxD
SIOFRxD
Normal FS
Secondary FS
L-channel
data
Slot
No.0
LSB=1 (Secondary FS request)
Control
channel 0
Slot
No.0
Specifications: TRMD[1:0]=01,
TDLE=1,
RDLE=1,
CD0E=1,
REDG=0,
TDLA[3:0]=0000,
RDLA[3:0]=0000,
CD0A[3:0]=0000,
FL[3:0]=1110 (Frame length: 128 bits),
TDRE=0,
TDRA[3:0]=0000,
RDRE=0, RDRA[3:0]=0000,
CD1E=0,
CD1A[3:0]=0000
Figure 16.8 Control Data Interface (Secondary FS)
Normal FS
Rev. 5.00 Mar. 15, 2007 Page 480 of 794
REJ09B0237-0500