MITSUBISHI MICROCOMPUTERS
M37274EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Port P4 Direction Register
b7 b6 b5 b4 b3 b2 b1 b0
0
Port P4 direction register (D4) [Address 00C916]
B
Name
Functions
R
R
W
W
After reset
0
0
Fix this bit to “0.”
Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are “0.”
1 to 4,
7
0
0
0
R
R
R
—
W
W
5
6
Port P45 selection bit
Port P46 selection bit
0: SOUT pin
1: Input port P45
0: SCLK pin
1: Input port P46
Port P4 Direction Register
Address 00C916
OSD Port Control Register
b7 b6 b5 b4 b3 b2 b1 b0
OSD port control register (PF) [Address 00CB16
]
0
0
0
B
Name
Functions
R
R
W
W
After reset
0
0, 1,
7
Fix these bits to “0.”
0
0
0
2
3
4
Port P5
selection bit (R)
2
output signal
0 : R signal output
1 : Port P52 output
R
R
R
W
W
W
Port P5 output signal
selection bit (G)
3
0 : G signal output
1 : Port P5 output
3
Port P5
selection bit (B)
4
output signal
0 : B signal output
1 : Port P5 output
4
5
6
Port P5
5
output signal
0 : OUT1 signal output
0
0
R
R
W
W
selection bit (OUT1)
Port P1 output signal
selection bit (OUT2)
Note. Set bit 0 of Port P1 direction register (address 00C316) to "1" (output mode).
1 : Port P5
5
output
0
0 : Port P1
0
output
(Note)
1 : OUT2 signal output
OSD Port Control Register
Address 00CB16
122
RENESAS [ RENESAS TECHNOLOGY CORP ]
