SH7261 Datasheet, PDF (823/1348 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

Section 18 Serial Sound Interface (SSI)
(6) Multi-channel Formats
Some devices extend the definition of the specification by Philips and allow more than 2 channels
to be transferred within two system words.
The SSI module supports the transfer of 2, 3 and 4 channels by using the CHNL, SWL and DWL
bits only when the system word length (SWL) is greater than or equal to the data word length
(DWL) multiplied by channels (CHNL).
Table 18.4 shows the number of padding bits for each of the valid setting. If setting is not valid,
"" is indicated instead of a number.
Table 18.4 The Number of Padding Bits for Each Valid Setting
Padding Bits
Per System Word
DWL[2:0] 000
001
010
011
100
101
110
CHNL
[1:0]
Decoded
Channels
per
System SWL
Word
[2:0]
Decoded
Word
Length 8
16
18
20
22
24
32
00
1
000 8
0






001 16
8
0





010 24
16
8
6
4
2
0

011 32
24
16
14
12
10
8
0
100 48
40
32
30
28
26
24
16
101 64
56
48
46
44
42
40
32
110 128
120 112 110 108 106 104 96
111 256
248 240 238 236 234 232 224
01
2
000 8







001 16
0






010 24
8






011 32
16
0





100 48
32
16
12
8
4
0

101 64
48
32
28
24
20
16
0
110 128
112 96
92
88
84
80
64
111 256
240 224 220 216 212 208 192
Rev. 2.00 Sep. 07, 2007 Page 791 of 1312
REJ09B0320-0200