HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 454

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

15.4.5
Control data performs control command output to the CODEC and status input from the CODEC.
The SIOF supports the following two control data interface methods.
• Control by slot position
• Control by secondary FS
Control data is valid only when data length is specified as 16 bits.
Control by Slot Position (Master Mode 1, Slave Mode 1): Control data is transferred for all
frames transmitted or received by the SIOF by specifying the slot position of control data. This
method can be used in both SIOF master and slave modes. Figure 15.7 shows an example of the
control data interface timing by slot position control.
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
• The CODEC outputs the secondary FS.
• The SIOF transmits or receives (stores in SIRCDR) control data (data specified by SITCDR)
Figure 15.8 shows an example of the control data interface timing by the secondary FS.
Rev. 1.00, 02/04, page 416 of 804
SIOFRXD
SIOFSYNC
SIOFTXD
SIOFSCK
by writing SITCDR).
synchronously with the secondary FS.
Control Data Interface
Specifications: TRMD[1:0]=00 or 10,
Slot No.0
L-channel
data
Figure 15.7 Control Data Interface (Slot Position)
TDLE=1,
RDLE=1,
CD0E=1,
channel 0
Slot No.1
Control
R-channel
Slot No.2
data
REDG=0,
TDLA[3:0]=0000,
RDLA[3:0]=0000,
CD0A[3:0]=0001,
channel 1
Slot No.3
Control
1 frame
FL[3:0]=1110 (Frame length: 128 bits),
TDRE=1,
RDRE=1,
CD1E=1,
TDRA[3:0]=0010,
RDRA[3:0]=0010,
CD1A[3:0]=0011