MC68HC708AS48 FREESCALE [Freescale Semiconductor, Inc], MC68HC708AS48 Datasheet - Page 174

• Manufacturer Part Number: MC68HC708AS48
• Description: Advance Information
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Computer Operating Properly (COP)
13.4 I/O Signals
13.4.1 CGMXCLK
13.4.2 STOP Instruction
13.4.3 COPCTL Write
13.4.4 Internal Reset Resources
13.4.5 Reset Vector Fetch
13.4.6 COPD (COP Disable)
Advance Information
174
The following paragraphs describe the signals shown in
CGMXCLK is the crystal oscillator output signal. CGMXCLK frequency
is equal to the crystal frequency.
The STOP instruction clears the SIM counter.
Writing any value to the COP control register (COPCTL) (see
Control
of the SIM counter. Reading the COP control register returns the reset
vector.
An internal reset clears the SIM counter and the COP counter. (See
9.4.2 Active Resets from Internal
A reset vector fetch occurs when the vector address appears on the data
bus. A reset vector fetch clears the SIM counter.
The COPD bit reflects the state of the COP disable bit (COPD) in the
CONFIG register ($001F).This signal disables COP generated resets
when asserted. (See
Computer Operating Properly (COP)
Register) clears the COP counter and clears bits 12 through 4
5.4 Configuration
Sources.)
Register.)
MC68HC708AS48
Figure
MOTOROLA
13.5 COP
—
13-1.
Rev. 4.0