User`s manual
140
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37281MAH–XXXSP,M37281MFH–XXXSP
M37281MKH–XXXSP,M37281EKSP
MITSUBISHI MICROCOMPUTERS
Rev. 1.0
Addresses 00C116, 00C316, 00C516
Address 00C716
b7 b6 b5 b4 b3 b2 b1 b0
Port P3 direction register (D3) [Address 00C7
16
]
B Name Functions
After reset
RW
Port P3 Direction Register
0 0 : Port P3
0
input mode
1 : Port P3
0
output mode
0
1
0 : Port P3
1
input mode
1 : Port P3
1
output mode
0
0
Port P3 direction register
Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are “0.”
RW
RW
R —2 to 5
6
Refer to Timer section.
Timer 3 count source
selection bit (T3CS)
0RW
7
Refer to clock control register
(address 0216
16
).
Ports P6
3
, P6
4
selection
bits (P6IM)
0RW
b7 b6 b5 b4 b3 b2 b1 b0
Port Pi direction register (Di) (i=0,1,2) [Addresses 00C1
16,
00C3
16
, 00C5
16
]
B Name Functions
After reset
R
W
Port Pi Direction Register
00 : Port Pi
0
input mode
1 : Port Pi
0
output mode
0
1
0 : Port Pi
1
input mode
1 : Port Pi
1
output mode
0
2
0 : Port Pi
2
input mode
1 : Port Pi
2
output mode
0
30 : Port Pi
3
input mode
1 : Port Pi
3
output mode
0
40 : Port Pi
4
input mode
1 : Port Pi
4
output mode
0
50 : Port Pi
5
input mode
1 : Port Pi
5
output mode
0
60 : Port Pi
6
input mode
1 : Port Pi
6
output mode
0
7
0 : Port Pi
7
input mode
1 : Port Pi
7
output mode
0
Port Pi direction register
RW
RW
RW
RW
RW
RW
RW
RW