M34512M2 Datasheet, PDF (51/80 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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MITSUBISHI MICROCOMPUTERS
4512 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
CONTROL REGISTERS (continued)
Key-on wakeup control register K0
at reset : 00002
at RAM back-up : state retained
Pins P12 and P13 key-on wakeup
K03
control bit
Pins P10 and P11 key-on wakeup
K02
control bit
Pins P02 and P03 key-on wakeup
K01
control bit
Pins P00 and P01 key-on wakeup
K00
control bit
0
Key-on wakeup not used
1
Key-on wakeup used
0
Key-on wakeup not used
1
Key-on wakeup used
0
Key-on wakeup not used
1
Key-on wakeup used
0
Key-on wakeup not used
1
Key-on wakeup used
PU03
PU02
PU01
PU00
Pull-up control register PU0
Pins P12 and P13 pull-up transistor
control bit
Pins P10 and P11 pull-up transistor
control bit
Pins P02 and P03 pull-up transistor
control bit
Pins P00 and P01 pull-up transistor
control bit
at reset : 00002
at RAM back-up : state retained
0
Pull-up transistor OFF
1
Pull-up transistor ON
0
Pull-up transistor OFF
1
Pull-up transistor ON
0
Pull-up transistor OFF
1
Pull-up transistor ON
0
Pull-up transistor OFF
1
Pull-up transistor ON
Clock control register MR
at reset : 10002
at RAM back-up : 10002
0
MR3 System clock selection bit
1
0
MR2 Not used
1
0
MR1 Not used
1
0
MR0 Not used
1
Note : “R” represents read enabled, and “W” represents write enabled.
f(XIN) (high-speed mode)
f(XIN)/2 (middle-speed mode)
This bit has no function, but read/write is enabled.
This bit has no function, but read/write is enabled.
This bit has no function, but read/write is enabled.
R/W
R/W
R/W
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