參數(shù)資料
型號： M37210M4-218SP
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
中文描述： 單芯片8位CMOS微機電壓合成與屏幕顯示控制器
文件頁數(shù)： 34/59頁
文件大?。?/td> 764K
代理商： M37210M4-218SP
MITSUBISHI MICROCOMPUTERS
M37210M3-XXXSP/FP, M37210M4-XXXSP, M37211M2-XXXSP
M37210E4-XXXSP/FP, M37210E4SP/FP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
34
(8) CRT Output Pin Control
CRT output pins R, G, B and OUT are respectively shared with port
P5
2
, P5
3
, P5
4
and P5
5
. When the corresponding bits in the port P5
control register (address 00CB
16
) are cleared to “0”, the pins are set
for CRT output ; when the bits are set to “1”, the pins function as port
P5 (general- purpose output pins).
The polarities of CRT outputs (R, G, B and OUT, as well as H
SYNC
and V
SYNC
) can be specified by using the CRT port control register
(address 00EC
16
).
Use bits 0 to 4 in the CRT port control register to set the output po-
larities of H
SYNC
, V
SYNC
, R/G/B and OUT. When these bits are
cleared to “0”, a positive polarity is selected ; when the bits are set to
“1”, a negative polarity is selected.
Bits 5 to 7 in the CRT port control register are used to specify pin by
pin whether normal video signals or R-MUTE, G-MUTE, and B-
MUTE signals are output from each pin (R, G, B). When set for R-
MUTE, G-MUTE, and B-MUTE outputs, the whole background
colors of the screen become red, green, and blue.
Figure 33 shows the structure of the CRT port control register.
Fig. 33 Structure of CRT port control register
7
0
H
SYNC
input polarity selection bit
0 : Positive polarity
1 : Negative polarity
Polarity register
(CRTP : address 00EC
16
)
V
SYNC
input polarity selection bit
0 : Positive polarity
1 : Negative polarity
OUT output polarity selection bit
0 : Positive polarity
1 : Negative polarity
R pin output switch bit
0 : R signal output
1 : R-MUTE signal output
G pin output switch bit
0 : G signal output
1 : G-MUTE signal output
R/G/B output polarity selection bit
0 : Positive polarity
1 : Negative polarity
B pin output switch bit
0 : B signal output
1 : B-MUTE signal output
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