參數(shù)資料
型號(hào): M37225ECSP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 8.1 MHz, MICROCONTROLLER, PDIP42
封裝: 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42
文件頁(yè)數(shù): 87/128頁(yè)
文件大?。?/td> 1481K
代理商: M37225ECSP
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M37225M6/M8/MA/MC-XXXSP, M37225ECSP
Rev.1.00
Nov 01, 2000
page 59 of 124
REJ03B0136-0100Z
(3) OSD input/output pin control
The OSD output pins R, G, B, OUT1 and OUT2 can also function as
ports P52, P53, P54, P55, P10 respectively. Switch either OSD out-
put function or port function by the OSD port control register (ad-
dress 00CB16).
The input polarity of the HSYNC, VSYNC and output polarity of signals
R, G, B, OUT1 and OUT2 can be specified with the OSD I/O polarity
register (address 00EB16). Set a bit to “0” to specify positive polarity;
Fig. 8.10.6 OSD I/O Polarity Register
b7 b6 b5 b4 b3 b2 b1 b0
OSD I/O polarity register (OPC) [Address 00EB16]
B
Name
Functions
Af t er re R W
OSD I/O Polarity Register
0
HSYNC input polarity
switch bit (OPC0)
0 : Positive polarity input
1 : Negative polarity input
0
1
0 : Positive polarity input
1 : Negative polarity input
0
2
R/G/B output polarity switch
bit (OPC2)
0 : Positive polarity output
1 : Negative polarity output
0
3
0
VSYNC input polarity
switch bit (OPC1)
R
W
R
W
R
W
R
W
4
OUT2 output polarity
switch bit (OPC4)
0 : Positive polarity output
1 : Negative polarity output
0
5
Raster color R control
bit (OPC5)
0 : No output
1 : Output
0
6
Raster color G control bit
(OPC6)
0
7
Raster color B control bit
(OPC7)
0 : No output
1 : Output
0
R
W
R
W
R
W
R W
OUT1 output polarity
switch bit (OPC3)
0 : Positive polarity output
1 : Negative polarity output
0 : No output
1 : Output
set it to “1” to specify negative polarity.
Figure 8.10.6 shows the OSD I/O polarity register and Figure 8.10.7
shows the OSD port control register.
Fig. 8.10.7 OSD Port Control Register
b7 b6 b5 b4 b3 b2 b1 b0
OSD port control register (PF) [Address 00CB16]
b
Name
Functions
After reset R W
OSD Port Control Register
0, 10
R W
Fix these bits to “0”
00
2
0 : R signal output
1 : Port P52 output
0
R W
3
Port P53 output signal
selection bit (P53SEL)
0 : G signal output
1 : Port P53 output
0
R W
4
Port P54 output signal
selection bit (P54SEL)
0 : B signal output
1 : Port P54 output
0
R W
5
Port P55 output signal
selection bit (P55SEL)
0 : OUT1 signal output
1 : Port P55 output
0
R W
6
Port P10 output signal
selection bit (OUT2SEL)
0 : Port P10 signal output
1 : OUT2 output
0
R W
Port P52 output signal
selection bit (P52SEL)
70
R W
Fix this bit to “0”
0
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