MC68HC708MP16 Datasheet, PDF (334/398 Pages) Freescale Semiconductor, Inc – Microcontrollers

Computer Operating Properly (COP)
16.3 Functional Description
Figure 16-1 shows the structure of the COP module.
CGMXCLK
SIM
13-BIT SIM COUNTER
SIM RESET CIRCUIT
SIM RESET STATUS REGISTER
INTERNAL RESET SOURCES⁽¹⁾
RESET VECTOR FETCH
COPCTL WRITE
COPEN (FROM SIM)
COPD (FROM CONFIG)
RESET
COPCTL WRITE
COP MODULE
6-BIT COP COUNTER
CLEAR
COP COUNTER
NOTE: See 7.4.2 Active Resets from Internal Sources.
Figure 16-1. COP Block Diagram
Addr.
$FFFF
Name
Bit 7 6
Read:
COP Control Register
(COPCTL)
Write:
Reset:
5
4
3
2
Low byte of reset vector
Writing to $FFFF clears COP counter
Unaffected by reset
Figure 16-2. COP I/O Register Summary
1 Bit 0
Technical Data
334
Computer Operating Properly (COP)
MC68HC708MP16 — Rev. 3.1
Freescale Semiconductor