1 INTRODUCTION

The PCI-DIO96 is a 96-bit line digital I/O board. The board provides the 96 bits in

four 24-bit groups. Each group provides an 8-bit port A and port B, as well as an

8-bit port C that can be split into independent 4-bit port C-HI and a 4-bit po rt C-LO.

See Figure 1-1 below.

On power up and reset, all I/O bits are set to input mode. If you are using the board

to control items that must be OFF on reset, you will need to install pull-down

resistors. Provisions have been made on the board to allow users to quickly and

easily install SIP resistor networks in either pull-up or pull-down configurations.

Figure 1-1. PCI-DIO96 Block Diagram

1

PCI-DIO96

Block Diagram

PCIBUS (5V, 32-BIT,33MHZ)
PCI
CONTROLLER BADR3
Boot
EEPROM
Control
Registers
Decode/Status
CONTROLLERFPGA and LOGIC
LOCALBUS
CONTROL
BUS
PortA
PortB
Control
(7:0)
(7:0)
DIOGroup 0
PortC
(7:0)
PortA
PortB
Control
(7:0)
(7:0)
DIOGroup 1
PortC
(7:0)
PortA
PortB
Control
(7:0)
(7:0)
DIOGroup 2
PortC
(7:0)
PortA
PortB
Control
(7:0)
(7:0)
DIOGroup 3
PortC
(7:0)
PLX-9052
COUNTERS
82C54
INT.
82C55
82C55
82C55
82C55