參數(shù)資料
型號(hào)： M37224M3-XXXSP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP42
封裝： 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42
文件頁(yè)數(shù)： 46/86頁(yè)
文件大?。?/td> 988K
代理商： M37224M3-XXXSP
M37224M3-XXXSP
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
47
(8) CRT Output Pin Control
The CRT output pins R, G, B, and OUT can also function as ports
P52, P53, P54 and P55. Set the corresponding bit of the port P5 di-
rection register (address 00CB16) to “0” to specify these pins as CRT
output pins, or set it to “1” to specify it as an general-purpose port P5
pins.
The input polarity of signals HSYNC and VSYNC and output polarity of
signals R, G, B, and OUT can be specified with the bits of the CRT
port control register (address 00EC16) . Set a bit to “0” to specify
positive polarity; set it to “1” to specify negative polarity. The struc-
ture of the CRT port control register is shown in Figure 48.
Fig. 48. CRT Port Control Register
b7 b6 b5 b4 b3 b2 b1 b0
CRT port control register (CRTP) [Address 00EC 16]
B
Name
Functions
After reset R W
CRT Port Control Register
0HSYNC input polarity
switch bit (HSYC)
0 : Positive polarity
1 : Negative polarity
0
1
0 : Positive polarity
1 : Negative polarity
0
2
R/G/B output polarity switch
bit (R/G/B)
0 : Positive polarity
1 : Negative polarity
0
3
Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is “0.”
0
4
OUT output polarity
switch bit (OUT)
0 : Positive polarity
1 : Negative polarity
0
5
R signal output switch bit
(OP5)
0 : R signal output
1 : MUTE signal output
0
6
G signal output switch bit
(OP6)
0 : G signal output
1 : MUTE signal output
0
7
B signal output switch bit
(OP7)
0 : B signal output
1 : MUTE signal output
0
VSYNC input polarity
switch bit (VSYC)
RW
R—
RW
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