VersaLogic VL-12CT96, Reference Manual

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VL-12CT96/7 Analog & Digital I/O Card
4-1
Registers
Introduction
This section includes information about registers, control and status bits, and data formats. It focuses
primarily on the individual registers, the bits contained within them, and their functional descriptions.
I/O Port Mapping
The VL-12CT96/7 uses one of two I/O port maps depending upon whether the data bus is configured
for 8-bit or 16-bit operation. In 8-bit mode, registers are mapped to correspond with Analog Device’s
RTI-1265 board. In 16-bit mode, the data registers are moved to an even address boundary to facilitate
efficient single-cycle reading of the A/D data.
8-Bit Mode 8-Bit Mode 16-Bit Mode 16-Bit Mode As Shipped
Input Port Output Port Input Port Output Port Port Address Address
— DAC1HI — DAC1HI Board A 15 030FH
— DAC1LO — DAC1LO Board A 14 030EH
— DAC0HI — DAC0HI Board A 13 030DH
— DAC0LO — DAC0LO Board A 12 030CH
PARHI PARHI PARHI PARHI Board A 11 030BH
PARLO PARLO PARLO PARLO Board A 10 030AH
— CLRFLG — CLRFLG Board A 9 0309H
— — — — Board A 8 0308H
— — — — Board A 7 0307H
— — — — Board A 6 0306H
— — ADCHI — Board A 5 0305H
ADCHI — ADCLO — Board A 4 0304H
ADCLO — — — Board A 3 0303H
— CONVERT — CONVERT Board A 2 0302H
— SELECT — SELECT Board A 1 0301H
STATUS CONTROL STATUS CONTROL Board A 0 0300H
Figure 4-1. I/O Port Addresses
Registers