Renesas SH7781 User Manual
Page 1336
26. Serial Sound Interface (SSI) Module
Rev.1.00 Jan. 10, 2008 Page 1306 of 1658
REJ09B0261-0100
Bit Bit
Name
Initial
Value R/W Description
8
DEL
0
R/W
Serial Data Delay
Set this bit to 1, if CPEN=1
0: 1 clock cycle delay between SSI_WS and
SSI_SDATA
1: No delay between SSI_WS and SSI_SDATA
7
BREN
0
R/W
Burst Mode Enable
0: Burst mode is disabled.
1: Burst mode is enabled.
Burst mode is used only in compressed mode (CPEN =
1) and transmit mode. When burst mode is enabled the
SSI_SCK signal is gated. Clock pulses are output only
when there is valid serial data being output on
SSI_SDATA.
6 to 4
CKDV2
CKDV2
CKDV0
0
0
0
R/W
R/W
R/W
Serial Oversampling Clock Division Ratio
These bits define the division ratio between
oversampling clock (SSI_CLK) and the serial bit clock
(SSI_SCK).
These bits are ignored if SCKD = 0.
The serial bit clock is used for the shift register and is
provided on the SSI_SCK pin.
000: (Serial bit clock frequency = oversampling clock frequency/1)
001: (Serial bit clock frequency = oversampling clock frequency/2)
010: (Serial bit clock frequency = oversampling clock frequency/4)
011: (Serial bit clock frequency = oversampling clock frequency/8)
100: (Serial bit clock frequency = oversampling clock frequency/16)
101: (Serial bit clock frequency = oversampling clock frequency/6)
110: (Serial bit clock frequency = oversampling clock frequency/12)
111: Setting prohibited
3 MUEN
0
R/W
Mute
Enable
0: The SSI module is not muted
1: The SSI module is muted
When the SSI module is muted in transmit mode, the
SSIn_SDATA pin is always low regardless of the
padding polarity selected.