MC68HC08AS32 Datasheet, PDF (110/280 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

CGMXCLK
SIM
12-BIT SIM COUNTER
STOP INSTRUCTION
INTERNAL RESET SOURCES⁽¹⁾
RESET VECTOR FETCH
COPCTL WRITE
COPEN (FROM SIM)
COPD (FROM MOR)
RESET
COPCTL WRITE
COPS
COP MODULE
6-BIT COP COUNTER
CLEAR
COP COUNTER
SIM RESET CIRCUIT
SIM RESET STATUS REGISTER
1. See 13.3.2 Active Resets from Internal Sources.
Figure 6-1. COP Block Diagram
6.3 I/O Signals
The following paragraphs describe the signals shown in Figure 6-1.
6.3.1 CGMXCLK
CGMXCLK is the crystal oscillator output signal. CGMXCLK frequency is equal to
the crystal frequency.
6.3.2 STOP Instruction
The STOP instruction clears the SIM counter.
Data Sheet
110
MC68HC08AS32 — Rev. 4.1
Freescale Semiconductor