MC68HC812A4 Datasheet, PDF (166/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

Clock Module
10.6.4 Arm/Reset COP Timer Register
Address: $0017
Bit 7
6
5
4
3
2
1
Bit 0
Read: 0
0
0
0
0
0
0
0
Write: Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reset: 0
0
0
0
0
0
0
0
Figure 10-10. Arm/Reset COP Timer Register (COPRST)
To restart the COP timeout period and avoid a COP reset, write $55 and
then $AA to this address before the end of the COP timeout period.
Other instructions can be executed between these writes. Writing
anything other than $55 or $AA causes a COP reset to occur.
MC68HC812A4 — Rev. 3.0
166
Clock Module
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