DIO24, User Manual
2.1.2. PCI-DIO24-GD1
This version of the board includes RS485 transceivers. The transceivers are the 25 small gray outlined squares in
Figure 2 running down the center of the board. If the transceivers have four unpopulated solder pads to their right,
then the transceivers are RS485 style. The GD1 variation of the DIO24 is identical to the base version except for the
PCI identification register values given in the below table.
Table 2
Register level identification of the PCI-DIO24-GD1.
Register
Value
Description
PCIIDR
0x908010B5
The lower 16-bits is the Vendor ID and identifies PLX Technology. The upper 16-
bits is the Device ID and identifies the chip is a PCI9080.
PCISVID
0x10B5
This identifies the PCISID as being assigned by PLX Technologies.
PCISID
0x2400
This identifies the board as a member of the HPDI32 product series.
FRR
0xXX0BXXXX
The value in the third byte identifies this as a DIO24.
2.2. Connectors
2.2.1. External I/O Connection: P1
Connector P1 is the external I/O connector that gives the user access to the board’s I/O pins. This is a 50-pin
connector that includes two pins for each of the board’s 25 I/O lines. Pin one is at the lower right and pin 50 is at the
upper left. The connector is manufactured by Tyco and has the part number AMP 1-103311-0. The part number of
the mating connector is AMP 1-746285. Figure 3 shows the connector as seen from the left side of Figure 2. The pin
assignments are given in Table 3.
Figure 3
External I/O connector P1.
Pin 1
PCB
Pin 2
Pin 49
Pin 50
Connector
P1
Key
Table 3
External I/O connector P1 pins and descriptions.
Pin No. Cable Signal Name Pin No.
Cable Signal Name
1
PORT A D0 +
26
PORT B D4 -
11
General Standards Corporation, Phone: (256) 880-8787
