Application Development Design Example; Figure 16-4 Application Development System Design Example - Motorola MC68VZ328 User 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.
V
DD
10K
Reset
Switch
V
DD
10K
V
DD
10K
Abort
Switch
V
DD
10K
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.
16-14
1 M
1N4148
R
TR
0.47 µ
CV
0.1 µ
MC68VZ328
CPU
EMUIRQ
D[15:0]
MC68VZ328 User's Manual
1 M
Q
DIS
THR
0.47 µ
MC1455
RESET
EMUCS
A14
PAL
A13
CSxx
RS-232
Host
Interface
68HC681
and
ADI Port
Debug
ROM/RAM
On-Board
Memory
RAM/ROM
D[15:0]
D[15:0]
PC