Renesas SH7781 User Manual

Page 1334

26. Serial Sound Interface (SSI) Module

Rev.1.00 Jan. 10, 2008 Page 1304 of 1658
REJ09B0261-0100

Bit Bit

Name

Initial
Value R/W Description

SWSP

R/W

Serial WS Polarity

The function of this bit depends on whether the SSI
module is in non-compressed mode or compressed
mode.

CPEN = 0 (Non compressed mode):

0: SSI_WS is low for the first system word, high for the

second system word

1: SSI_WS is high for the first system word, low for the

second system word

CPEN = 1 (Compressed mode):

0: SSI_WS is active high flow control. WS = high means

data should be transferred, low means data should
not be transferred.

1: SSI_WS is active low flow control. WS = low means

data should be transferred, high means data should
not be transferred.

Note: Do not change this bit when EN is 1.

SPDP

R/W

Serial Padding Polarity

This bit is ignored if CPEN = 1.

0: Padding bits are low

1: Padding bits are high

Note: The padding bits become low-level when the

MUEN bit is set to 1. (Mute function has the
higher priority)

SDTA

R/W

Serial Data Alignment

This bit is ignored if CPEN = 1.

0: Serial data is transmitted/ received first, followed by

padding bits.

1: Padding bits are transmitted/ received first, followed

by serial data.