MiTAC 7521 PLUS/N - Manual (Page 129)

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7521 7521 Plus / N N/B MAINTENANCE Plus / N N/B MAINTENANCE
8.11 SIO PORT TEST ERROR
An error occurs when a mouse or other I/O device is installed.
COM1CTS#
J507
U1
ADM3311
D/RXD
D/DTR#
U27
SUPER I/O
PC97338VJG
RS232_OFF#
ISA_IRQ4
U24
SIS630S
COM1RXD
COM1DCD#
COM1RI#
PIN 1: DCD…… DATA CARRIER DETECT PIN 6: DSR….. DATA SET READY
PIN 2: RD…….. RECEIVED DATA PIN 7: RTS….. REQUEST TO SEND
PIN 3: TD…….. TRANSMIT PIN 8: CTS….. CLEAR TO SEND
PIN 4: DTR…… DATA TERMINAL READY PIN9: RI…….. RING INDICATOR
PIN 5: SG…….. SIGNAL GROUND
PIN DEFINITION OF SIO PORT:
PIN 1,4,6 SHORT
PIN 2,3 SHORT
PIN 7,8,9 SHORT
LOOPBACK CONNECTOR
FOR SIO TEST
Q1
+3V
U31
W83626F
SH19 SH19
SH18
SH6
D/RTS#
COM1RTS# D/TXD
COM1TXD
COM1DTR#
D/DSR#
COM1DSR#
D/CTS#
D/RI#
D/DCD#
R1
100K