mc68hc05jp6pe Freescale Semiconductor, Inc, mc68hc05jp6pe Datasheet - Page 63

• Manufacturer Part Number: mc68hc05jp6pe
• Description: M68hc05 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

5.5.3 Low-Voltage Reset (LVR)
MC68HC05JJ6/MC68HC05JP6
Freescale Semiconductor
NOTE:
$1FF0
Reset:
Figure
location when read.
COPC — COP Clear
The COP watchdog reset will assert the pulldown device to pull the
RESET pin low for three to four cycles of the internal bus.
The COP watchdog reset function can be enabled or disabled by the
COP watchdog timer mask option.
The LVR activates the RST reset signal to reset the device when the
voltage on the V
assert the pulldown device to pull the RESET pin low for three to four
cycles of the internal bus.
The LVR reset function can be enabled or disabled by the low-voltage
reset mask option.
The LVR is guaranteed for applications where the V
normally operates above 4.5 volts. Devices that have the LVR mask
option selected cannot be operated at the 3-V operating range.
Read:
Write:
COPC is a write-only bit. Periodically writing a logic zero to COPC
prevents the COP watchdog from resetting the MCU. Reset clears the
COPC bit.
—
Rev. 3.2
1 = No effect on COP watchdog timer
0 = Reset COP watchdog timer
5-2, is a write-only register that returns the contents of a ROM
Bit 7
= Unimplemented
DD
Figure 5-2. COP Register (COPR)
6
pin falls below the LVR trip voltage. The LVR will
Resets
5
Unaffected by Reset
4
3
General Release Specification
2
DD
supply voltage
1
COPC
Resets
Bit 0
63