Specifications
75DS2 Operations Manual
North Atlantic Industries, Inc.
11/11/2011
Rev: 2011-11-11-1000
www.naii.com
Page 9 of 43
Product Configuration and Memory Map
This design provides multiple functions on a single cPCI (3U) card. When ordering, the customer selects an
assortment of up to 2 modules to populate this 2-
slot “motherboard.” The memory map follows the order of
modules specified in the part number.
To address the register of any module, use the
Base
address to the entire card, add the
Module Offset
depending upon its slot (000 or 800), and then add the
Register Offset
of interest (see module memory map.)
The memory map of each selected module counts from, or is superimposed over its respective module offset.
Thus,
Address = Base + Module Register Offset
.
For example
, if a Digital I/O module were selected to populate module 1 and a Discrete I/O module were
selected to populate module 2:
Address = Base + Module 1 Offset 000 + Digital I/O register 010 = Base + 010 hex
Address = Base + Module 2 Offset 800 + Discrete I/O register 024 = Base + 824 hex
MEMORY MAP
000
Module 1 Register…
800
Module 2 Register…
3000
Unit Level General Register…
004
804
3004
008
808
3008
00C
80C
300C
010
810
3010
.
.
.
.
.
.
.
.
.
7FE
FFE
37FE
7FF
FFF
37FF
Any address NOT SPECIFIED within 4096 byte block (up to 3FFFh) is reserved.
The memory map of each module type is described hereafter:
Slot 2
Offset 800
Slot 1
Offset 000
General
Offset 3000
