156
2. APPLICAT ION
MITSUBISHI MICROCOMPUTER
3819 Group
2.9 Clock generating circuit
3819 Group USER’S MANUAL
Fig. 2.9.4 Structure of Timer 34 mode register
Fig. 2.9.3 Structure of Timer 12 mode register
Timer 12 mode register
b7 b6 b5 b4 b3 b2 b1 b0
B
0
Function
At reset
R W
0
1
2
3
4
5
6
7
0
0
0
0
0
0
0
Timer 12 mode register (T12M) [Address:28
16
]
Name
Timer 1 count stop bit
Timer 2 count stop bit
Timer 1 count source
selection bit
Nothing is allocated for this bit. This is a write disabled bit.
When this bit is read out, the value is "0."
Timer 2 count source
selection bits
Timer 1 output selection bit
(P4
6
)
Nothing is allocated for this bit. This is a write disabled bit.
When this bit is read out, the value is "0."
0 : Operating
1 : Stopped
0 : Operating
1 : Stopped
0 : f(X
IN
)/16 or f(X
CIN
)/16
1 : f(X
CIN
)
01 : f(X
CIN
)
10 : External count input CNTR
0
11 : Not available
0 : I/O port
1 : Timer 1 output
b5 b4
Timer 34 mode register
b7 b6 b5 b4 b3 b2 b1 b0
B
0
Function
At reset
R W
0
1
2
3
4
5
6
7
0
0
0
0
0
0
0
Timer 34 mode register (T34M) [Address:29
16
]
Name
Timer 3 count stop bit
Timer 4 count stop bit
Timer 3 count source
selection bit
Nothing is allocated for this bit. This is a write disabled bit.
When this bit is read out, the value is "0."
Timer 4 count source
selection bits
Timer 3 output selection bit
(P4
7
)
Nothing is allocated for this bit. This is a write disabled bit.
When this bit is read out, the value is "0."
0 : Operating
1 : Stopped
0 : Operating
1 : Stopped
0 : f(X
IN
)/16 or f(X
CIN
)/16
1 : Timer 2 underflow
IN
)/16 or f(X
CIN
)/16
01 : Timer 3 underflow
10 : External count input CNTR
1
11 : Not available
0 : I/O port
1 : Timer 3 output
b5 b4