M34280M1-XXXGP View Datasheet(PDF) - MITSUBISHI ELECTRIC
Part Name
Description
Manufacturer
M34280M1-XXXGP
MITSUBISHI ELECTRIC
M34280M1-XXXGP Datasheet PDF : 47 Pages
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MITSUBISHI MICROCOMPUTERS
4280 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTERS
CONTROL REGISTERS
Timer control register V1
V12 Carrier wave output auto-control bit
V11 Timer 1 count source selection bit
V10 Timer 1 control bit
Pull-down control register PU0
PU02 Port D7 pull-down control bit
PU01 Port E1 pull-down control bit
PU00 Port E0 pull-down control bit
at reset : 0002
at RAM back-up : 0002
W
0 Auto-control output by timer 1 is invalid
1 Auto-control output by timer 1 is valid
0 Carrier output (CARRY)
1 Bit 5 of watchdog timer (WDT)
0 Stop (Timer 1 state retained)
1 Operating
at reset : 0002
at RAM back-up : state retained
W
0 Pull-down transistor OFF, input circuit OFF, key-on wakeup invalid
1 Pull-down transistor ON, input circuit ON, key-on wakeup valid
0 Pull-down transistor OFF, key-on wakeup invalid
1 Pull-down transistor ON, key-on wakeup valid
0 Pull-down transistor OFF, key-on wakeup invalid
1 Pull-down transistor ON, key-on wakeup valid
Carrier wave selection register C
C2
C1 Carrier wave selection bits
C0
at reset : 1112
at RAM back-up : 1112
C2 C1 C0
000
001
010
011
100
101
110
111
Carrier wave
Frequency
System clock/12
System clock/12
System clock/8
System clock/8
System clock
No carrier wave
f(XIN)/4 (Note 2)
“L” level fixed
Duty
1/3
1/2
1/4
1/2
1/2
1/2
R/W
Logic operation selection register LO
at reset : 002
at RAM back-up : 002
W
LO1
Logic operation selection bits
LO1 LO0
Logic operation function
0 0 Exclusive logic OR operation (XOR)
0 1 OR operation (OR)
LO0
1 0 AND operation (AND)
1 1 Not available
Notes 1: “R” represents read enabled, and “W” represents write enabled.
2: f(XIN) is valid only when f(XIN)/8 is selected as the system clock.
MITSUBISHI
36
ELECTRIC
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