65
8Bit Single Chip Microcontroller
DMC73C168
P30
SIO2AF
I
N
T
E
R
SI2 SHIFT
E4/SI2 PIN
KEY
EDATA Reg
EDATA Reg
shift clock
E5/SCLK2 PIN
N
A
L
SCLK2E *1 (P29.2)
SO2 SHIFT
KEY
E3/SO2 PIN
B
U
S
SO2ENA *2 (P29.1)
P30
SIO2ST
Figure 5-9B. Serial I/O2 Block Diagram
Slave
Masten
SCLKn
SIn
SCLKn
Son
SOn
SIn
Figure 5-9-1. Master-Slave Connection Example
SCLKn
LSB
1
MSB
1
DATA
0
0
1
1
0
0
Sin/Son
Figure 5-9-2. Serial Communication Format
SCLK
BIT0
BIT2
BIT1
SI
BIT7
SO
BIT0
BIT1
BIT2
BIT7
Figure 5-9-3. Serial I/O Timing
£Ä£Á£Å£×£Ï £Ï
DAEWOO ELECTRONICS CO., LTD.