UPD753012GC NEC, UPD753012GC Datasheet - Page 32

• Manufacturer Part Number: UPD753012GC
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER
• Manufacturer: NEC

P03/SI/SB1
P02/SO/SB0
P01/SCK
P01
output Iatch
Selector
Selector
CSIM
8/4
Bit test
Figure 6-9. Serial Interface Block Diagram
8
Internal bus
8
Slave address register (SVA)
Address comparator
Shift register (SIO)
Bus release/
command/
acknowledge
detector
Serial clock counter
Serial clock control
circuit
8
Match
signal
(8)
(8)
(8)
RELD
CMDD
ACKD
Bit manipulation
SET CLR
D
control circuit
INTCSI
RELT
Q
CMDT
SO latch
Busy/
acknowledge
output circuit
Serial clock
selector
SBIC
External SCK
Bit test
INTCSI
IRQCSI
set signal
f
f
f
TOUT F/F
(from timer/event counter)
X
X
X
/2
/2
/2
3
4
6