參數(shù)資料
型號: UPD75068GB
廠商: NEC Corp.
英文描述: 4-BIT SINGLE-CHIP MICROCOMPUTER
中文描述: 4位單片機
文件頁數(shù): 24/68頁
文件大?。?/td> 640K
代理商: UPD75068GB
24
μ
PD75064, 75066, 75068, 75064(A), 75066(A), 75068(A)
5.7 Serial Interface
(1) Serial interface function
The
μ
PD75068 contains a clock synchronous 8-bit serial interface, which has four modes.
Operation halt mode
3-wire serial I/O mode
2-wire serial I/O mode
SBI (serial bus interface mode)
Figure 5-6. Block Diagram of Serial Interface
Internal bus
8
8
8
8/4
P03/SI/SB1
P02/SO/SB0
P01/SCK
(8)
f
x
/2
3
f
x
/2
4
f
x
/2
6
TOUT F/F
(from timer/
event counter)
CSIM
RELD
CMDD
ACKD
A
A
B
RELT
CMDT
D
Q
SET CLR
(8)
(8)
SBIC
Bit
test
Slave address
register (SVA)
Address comparator
Shift register (SIO)
Match
signal
Bit manipulation
SO
latch
Bit
test
S
Busy/
acknowledge
output circuit
Bus release/
command/
acknowledge
detection circuit
Serial clock
counter
Serial clock
control circuit
INTCSI
control circuit
IRQCSI
set signal
INTCSI
P01
output
latch
Serial clock
selector
External SCK
S
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