MC68HC812A4 Datasheet, PDF (197/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

Standard Timer Module
Registers and Reset Initialization
TOF — Timer Overflow Flag
TOF is set when the timer counter rolls over from $FFFF to $0000.
Clear TOF by writing a 1 to it.
1 = Timer overflow
0 = No timer overflow
NOTE:
When the timer channel 7 registers contain $FFFF and the timer counter
reset enable bit, TCRE, is set, TOF does not get set when the counter
rolls over.
NOTE: When the fast flag clear-all bit, TFFCA, is set, any access to the timer
counter registers clears TOF.
12.6.13 Timer Channel Registers
TC0H/L: $0090/$0091
TC1H/L: $0092/$0093
TC2H/L: $0094/$0095
TC3H/L: $0096/$0097
TC4H/L: $0098/$0099
TC5H/L: $009A/$009B
TC6H/L: $009C/$009D
TC7H/L: $009E/$009F
Bit 7
6
5
Read:
Bit 15
14
13
Write:
Reset: 0
0
0
4
3
2
12
11
10
0
0
0
1
Bit 0
9
8
0
0
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Bit 7
6
5
4
3
2
1
Bit 0
Write:
Reset: 0
0
0
0
0
0
0
0
Figure 12-20. Timer Channel Registers (TCxH/L)
Advance Information
MOTOROLA
Standard Timer Module
MC68HC812A4 — Rev. 3.0
197