5 application development design example, Application development design example -14, Figure 16-4 – Motorola MC68VZ328 User Manual
Page 306: Application development system design example -14
16-14
MC68VZ328 User’s Manual
Application Development Design Example
16.5
Application Development Design Example
Figure 16-4 displays an example of an application development system design. This example is for initial
start-up designs and software development that occurs after the target hardware system is completed.
Figure 16-4. Application Development System Design Example
There is one reset switch and one abort switch. The abort switch is debounced and connected to the
EMUIRQ signal. The RESET signal is generated by the MC1455 monostable timer. The host interface port
is selected by the PAL decoding the EMUCS, A13, and A14 signals. The board also provides optional
SRAM and ROM plug-in sockets for expansion.
Host
Interface
RS-232
On-Board
Memory
Debug
EMUCS
D[15:0]
MC68VZ328
CPU
CSxx
ROM/RAM
68HC681
PC
EMUIRQ
10K
V
DD
Abort
10K
V
DD
Switch
PAL
A14
RAM/ROM
10K
V
DD
Reset
10K
V
DD
1N4148
1 M
0.47 µ
0.47 µ
0.1 µ
CV
TR
DIS
THR
Q
R
1 M
Switch
MC1455
RESET
and
ADI Port
A13
D[15:0]
D[15:0]