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D.1 RS422/485 Port
•
CN2 : RS422/485 CONNECTOR
RS485 on Wafer-7851 features the “auto-direction” function that
make it more easier to be used on Windows environment. The
installation please refer to
Section 2.5
PIN NO.
DESCRIPTION
1 TX2+
2 TX2-
3 RX2+
4 RX2-
D.2 4-IN AND 4-OUT DIGITAL I/O
The mapping system address is
801H.
Wafer 7851 provides one byte
for customized in/out control. The default input value is 1111 in binary
format.
The high level is in 5 volts, and the low level is in 0 volts.
•
CN3
PIN NO.
DESCRIPTION
1
DIN0
BIT0
3
DIN1
BIT1
5 DIN2
BIT2
7 DIN3
BIT3
2 DOUT0
BIT4
4 DOUT1
BIT5
6 DOUT2
BIT6
8 DOUT3
BIT7
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D.3 TV OUT
The selection of NTSC or PAL TV system is on driver, no
hardware jumper.
•
CN4 : TV OUTPUT
Wafer-7851 provides both composite and S-Video signal.
PIN NO.
DESCRIPTION
1 COMPOSITE
VIDEO
2 GND
3 CHROMA
4 GND
5 LUMA
6
GND
Two pin Composite type cable on the WAFER-7851’s CN4
Caution!
Please plug the cable
as the picture shown
Composite
Video
GND