MC68HC705P6A Datasheet, PDF (34/130 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Memory
2.8 Mask Option Register
The mask option register (MOR) is a pair of EPROM bytes located at
$1EFF and $1F00. It controls the programmable options on the
MC68HC705P6A. See Section 11. Mask Option Register (MOR) for
additional information.
$1EFF Bit 7
Read:
PA7PU
Write:
Erased State: 0
6
PA6PU
0
5
PA5PU
0
4
PA4PU
0
3
PA3PU
0
2
PA2PU
0
1
PA1PU
0
Bit 0
PA0PU
0
$1F00 Bit 7
6
5
4
3
2
1
Bit 0
Read:
SECURE
Write:
SWAIT SPR1 SPR0 LSBF LEVEL COP
Erased State: 0
0
0
0
0
0
0
0
= Unimplemented
Figure 2-4. Mask Option Register (MOR)
2.9 Computer Operating Properly (COP) Clear Register
The computer operating properly (COP) watchdog timer is located at
address $1FF0. Writing a logical 0 to bit zero of this location will clear the
COP watchdog counter as described in 4.4.2 Computer Operating
Properly (COP) Reset.
$1FF0
Read:
Write:
Reset:
Bit 7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
= Unimplemented
Figure 2-5. COP Watchdog Timer Location
Bit 0
0
COPR
0
Advance Information
34
Memory
MC68HC705P6A — Rev. 2.0
MOTOROLA