Renesas 4514 - Manual (Page 146)

APPLICATION
2.4 Serial I/O
2-43 4513/4514 Group User’s Manual
Fig. 2.4.4 Serial I/O transfer timing
S IN
S OUT
Slave
S CK
SST instruction
S OUT
S IN S 0 S 7 ’ S 1 S 2 S 3 S 4 S 5 S 6 S 7
SST instruction
Control signal
S
0 S
7
’ S
1
S
3
S
4
S
5
S
6
S
7
M
0
M
7
’ M
1
M
2 M
3
M
4
M
5
M
6
M
7
M 0 M 7 ’ M 1 M 2 M 3 M 4 M 5 M 6 M 7
S
2
Master
M 0 –M 7 : the contents of master serial I/O register
S 0 –S 7 : the contents of slave serial I/O register
Rising of S CK : serial input
Falling of S CK : serial output
M 0 ’–M 7 ’: previous MSB contents of master and slave