PCI-SIO4 User Manual
General Standards Corporation
8302A Whitesburg Drive Huntsville, AL 35802, Phone: (256) 880-8787
53
CHAPTER 5: HARDWARE CONFIGURATION
5.0
THE ON-BOARD MASTER & TRANSMIT/RECEIVE CLOCKS
The oscillator, U3, is used for generating the on-board clock. It is factory installed at 20 MHz.
The oscillator, U1, is used for generating a transmit/receive clock. It is factory installed at 20 MHz and may
be changed to accommodate different baud rates. Any standard 8 or 14 pin dip oscillator will fit into the
socket of U1.
5.1
EEPROM JUMPER (J12)
The jumper (J12) is a 2x3 header. These jumpers are used for manufacturer uses only. It should not be
necessary for any users of the PCI-SIO4 to perform any operations involving these jumpers.
5.2
CABLE INTERFACE CONNECTIONS
There is a 68-pin DSUB (user I/O interface) connector (PLUG) mounted/soldered to the front edge of the
board (Ref. Des.: PA2, for row A & PB2, for row B). The part number is P50E-068PI-SRI-TG,
manufacturer, Robinsen Nugent. The mating part number is P50E68-S-TG. This cable is used for all 4
channels. See Table 4.2-1 below for pin-out.
Table 5-2.1: User Cable Pin-Out
PA2, Row A, Signal Names:
Pin #
PB2, Row B, Signal Names:
Pin #
Channel 1 Lwr Cable TXD/RXD +
1
Channel 3 Lwr Cable TXD/RXD +
35
Channel 1 Lwr Cable TXD/RXD -
2
Channel 3 Lwr Cable TXD/RXD -
36
Channel 1 Lwr Cable CTS/DCD +
3
Channel 3 Lwr Cable CTS/DCD +
37
Channel 1 Lwr Cable CTS/DCD -
4
Channel 3 Lwr Cable CTS/DCD -
38
Channel 1 Lwr Cable TX/RX Clk +
5
Channel 3 Lwr Cable TX/RX Clk +
39
Channel 1 Lwr Cable TX/RX Clk -
6
Channel 3 Lwr Cable TX/RX Clk -
40
Channel 1 Upr Cable TXD/RXD +
7
Channel 3 Upr Cable TXD/RXD +
41
Channel 1 Upr Cable TXD/RXD -
8
Channel 3 Upr Cable TXD/RXD -
42
Channel 1 Upr Cable CTS/DCD +
9
Channel 3 Upr Cable CTS/DCD +
43