SH7670 Datasheet, PDF (631/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 16 Serial Sound Interface (SSI)
Figure 16.5 shows Sony format and figure 16.6 shows Matsushita format. Padding is assumed in
both cases, but may not be present in a final implementation if the system word length equals the
data word length.
• Sony Format
SCKP = 0, SWSP = 0, DEL = 1, CHNL = 00, SPDP = 0, SDTA = 0
System word length > data word length
SSISCK
SSIWS
SSIDATA
MSB
LSB
MSB
LSB
Next
Data word 1
Padding
Data word 2
Padding
System word 1
System word 2
Figure 16.5 Sony Format
(Transmitted and received in the order of padding bits and serial data)
• Matsushita Format
SCKP = 0, SWSP = 0, DEL = 1, CHNL = 00, SPDP = 0, SDTA = 1
System word length > data word length
SSISCK
SSIWS
SSIDATA ^Prev.
MSB
LSB
Padding
Data word 1
System word 1
MSB
LSB
Padding
Data word 2
System word 2
Figure 16.6 Matsushita Format
(Transmitted and received in the order of serial data and padding bits)
Rev. 1.00 Nov. 14, 2007 Page 605 of 1262
REJ09B0437-0100