Freescale Semiconductor MC68HC08KH12 manual 1shows the structure of the COP module

13.3 Functional Description

Figure 13-1shows the structure of the COP module.

CGMXCLK	12-BIT SIM COUNTER
STOP INSTRUCTION	CLEAR ALL STAGES	CLEAR STAGES 5–12	TIMEOUT
INTERNAL RESET SOURCES
			COP
RESET VECTOR FETCH
COPCTL WRITE
	COP CLOCK

COP MODULE

6-BIT COP COUNTER COPEN (FROM SIM)

COP DISABLE (COPD FROM CONFIG)

RESET	CLEAR
COPCTL WRITE	COP COUNTER
COP RATE SEL
(COPRS FROM CONFIG)

RESET CIRCUIT

RESET STATUS REGISTER

Figure 13-1. COP Block Diagram

Table 13-1. COP I/O Port Register Summary

Addr.	Register Name
		Read:
$001F	Configuration Register	Write:
	(CONFIG)†

Bit	7	6	5	4	3	2	1	Bit 0
0		0	0	0	SSREC	COPRS	STOP	COPD

Reset:

Read:

$FFFF COP Control Register Write:

(COPCTL)

Reset:

† One-time writable register

0 0 0 0 0 0 0 0

Low byte of reset vector

Clear COP counter

Unaffected by reset

= Unimplemented

Advance Information	MC68HC(7)08KH12 — Rev. 1.1
208	Freescale Semiconductor