mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 355

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

21.5 COP Control Register
21.6 Interrupts
21.7 Monitor Mode
21.8 Low-Power Modes
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
Address:
The COP control register is located at address $FFFF and overlaps the
reset vector. Writing any value to $FFFF clears the COP counter and
starts a new timeout period. Reading location $FFFF returns the low
byte of the reset vector.
The COP does not generate CPU interrupt requests.
When monitor mode is entered with V
disabled as long as V
monitor mode is entered by having blank reset vectors and not having
V
occurs.
The WAIT and STOP instructions put the MCU in low power-
consumption standby modes.
Reset:
Read:
Write:
TST
on the IRQ1 pin, the COP is automatically disabled until a POR
$FFFF
Bit 7
Computer Operating Properly (COP)
Figure 21-3. COP Control Register (COPCTL)
6
TST
remains on the IRQ1 pin or the RST pin. When
5
Low byte of reset vector
Unaffected by reset
Clear COP counter
4
TST
Computer Operating Properly (COP)
on the IRQ1 pin, the COP is
3
2
COP Control Register
1
Data Sheet
Bit 0
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