M37160M8 Datasheet, PDF (80/131 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

M37160M8/MA/MF-XXXSP/FP,M37160EFSP/FP
8.10.14 OSD Output Pin Control
The OSD output pins R, G, B and OUT can also function as ports
P52–P55. Set the corresponding bit of the OSD port control register
(address 00CB16) to “0” to specify these pins as OSD output pins, or
to “1” to specify as the general-purpose port P5.
The input polarity of the HSYNC and VSYNC, and the output polarity of
signals R, G, B, OUT can be specified with the I/O polarity control
register (address 00D8.) Set bits to “0” to specify positive polarity; “1”
to specify negative polarity (refer to Figure 8.10.13).
The structure of the OSD port control register is shown in Figure
8.10.29.
OSD Port Control Register
b7 b6 b5 b4 b3 b2 b1 b0
00
0 0 ^{OSD port control register (PF) [Address 00CB}16]
B
Name
0, 1 Fix these bits to “0.”
2 Port P52 output signal
selection bit (PF2)
3 Port P53 output signal
selection bit (PF3)
4 Port P54 output signal
selection bit (PF4)
5 Port P55 output signal
selection bit (PF5)
6 _{Fix these bit to “0.”}
7
Functions
0 : B signal output
1 : Port P52 output
0 : G signal output
1 : Port P53 output
0 : R signal output
1 : Port P54 output
0 : OUT signal output
1 : Port P55 output
After reset R W
0
R—
0
RW
0
RW
0
RW
0
RW
Indeterminate — W
0
RW
Fig. 8.10.29 OSD Port Control Register
Rev.1.01 2003.11.13 page 80 of 130