Serial Interface Converter Board Theory of Operation
1 - 14 0070-10-0591-01 Trio™ Service Manual
1.3 Serial Interface Converter Board
The Serial Interface Converter Board is used to convert the TTL level (5V) to RS232 level.
FIGURE 1-10 Serial Interface connection diagram
FIGURE 1-11 Block diagram of Serial Interface Converter Board
Host P.C.B.
P5
P10
P13
P8
P1 4
P9
P6
P1 7(F O R 5 0 9 C )
P11
P12
P15
P16
P1
P2 ( CRT)
P4(TFT_DIGTAL )
P3(FOR 9000
VGA)
P7(BDM
)
Serial Coverter
P.C.B
J2
J1
Converter Board
Tx
Rx
G
5V
Tx
Rx
G
TTL Level
RS232 Level
DB9 Socket
RS232
Converter
chip
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