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
P14
P9
P6
P17(FOR 509C)
P11
P12
P15
P16
P1
P2(CRT)
P4(TFT_DIGTAL )
P3(FOR 9000
VGA )
P7(BDM
)
Serial Coverter
P.C.B
J2
J1
Serial
interface
Converter Board
Tx
Rx
G
5V
Tx
Rx
G
TTL Level
RS232 Level
DB9 Socket
RS232
Converter
chip