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MITSUBISHI
ELECTRIC
57
MITSUBISHI MICROCOMPUTERS
4282 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
REGISTER STRUCTURE
V12
V11
V10
Timer control register V1
Auto-control output by timer 1 is invalid
Auto-control output by timer 1 is valid
Carrier wave output (CARRY)
Bit 5 of watchdog timer (WDT)
Stop (Timer 1 state retained)
Operating
0
1
0
1
0
1
Carrier wave output auto-control bit
Timer 1 count source selection bit
Timer 1 control bit
at reset : 0002
W
at RAM back-up : 0002
V13
V12
V11
V10
Timer control register V1
To expand “H” interval is invalid
To expand “H” interval is valid (when V22=1 selected)
Carrier wave generation function invalid
Carrier wave generation function valid
f(XIN)
f(XIN)/2
Stop (Timer 2 state retained)
Operating
0
1
0
1
0
1
0
1
Carrier wave “H” interval expansion bit
Carrier wave generation function control bit
Timer 2 count source selection bit
Timer 2 control bit
at reset : 00002
W
at RAM back-up : 00002
at reset : 002
at RAM back-up : 002
W
LO1
0
1
LO0
0
1
0
1
LO1
LO0
Logic operation selection bits
Logic operation selection register LO
Logic operation function
Exclusive logic OR operation (XOR)
OR operation (OR)
AND operation (AND)
Not available
PU03
PU02
PU01
PU00
Pull-down transistor OFF, key-on wakeup invalid
Pull-down transistor ON, key-on wakeup valid
Pull-down transistor OFF, key-on wakeup invalid
Pull-down transistor ON, key-on wakeup valid
Pull-down transistor OFF, key-on wakeup invalid
Pull-down transistor ON, key-on wakeup valid
Pull-down transistor OFF, key-on wakeup invalid
Pull-down transistor ON, key-on wakeup valid
Ports G2, G3 pull-down transistor control
bit
Ports G0, G1 pull-down transistor control
bit
Port E1 pull-down transistor control bit
Port E0 pull-down transistor control bit
Pull-down control register PU0
at reset : 00002
at RAM back-up : state retained
W
0
1
0
1
0
1
0
1
PU13
PU12
PU11
PU10
Pull-down transistor OFF, key-on wakeup invalid
Pull-down transistor ON, key-on wakeup valid
Pull-down transistor OFF, key-on wakeup invalid
Pull-down transistor ON, key-on wakeup valid
Pull-down transistor OFF, key-on wakeup invalid
Pull-down transistor ON, key-on wakeup valid
Pull-down transistor OFF, key-on wakeup invalid
Pull-down transistor ON, key-on wakeup valid
Port D7 pull-down transistor control bit
Port D6 pull-down transistor control bit
Port D5 pull-down transistor control bit
Port D4 pull-down transistor control bit
Pull-down control register PU1
at reset : 00002
at RAM back-up : state retained
W
0
1
0
1
0
1
0
1