Table of Contents
Advertisement
2.9.4 Access to External Address Space
The external address space is divided into eight areas (areas 0 to 7). Bus-controller settings
determine whether each area is accessed via an 8-bit or 16-bit bus, and whether it is accessed in
two or three states. For details see section 6, Bus Controller.
Downloaded from
Elcodis.com
electronic components distributor
ø
Address bus
AS
RD HWR LWR
,
,
,
High
D
to D
7
0
Figure 2-18 Pin States during Access to On-Chip Supporting Modules
T
T
1
2
Address
High impedance
54
T
3
Advertisement
Table of Contents
