MC68HC08AS32 Datasheet, PDF (225/394 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Timer Interface (TIM)
I/O Registers
16.9.3 TIM Counter Modulo Registers
The read/write TIM modulo registers contain the modulo value for the
TIM counter. When the TIM counter reaches the modulo value, the
overflow flag (TOF) becomes set, and the TIM counter resumes counting
from $0000 at the next clock. Writing to the high byte (TMODH) inhibits
the TOF bit and overflow interrupts until the low byte (TMODL) is written.
Reset sets the TIM counter modulo registers.
Register Name and Address TMODH — $0024
Bit 7
6
5
4
3
2
1
Bit 0
Read:
BIT 15 BIT 14 BIT 13 BIT 12 BIT 11 BIT 10 BIT 9 BIT 8
Write:
Reset: 1
1
1
1
1
1
1
1
Register Name and Address TMODL — $0025
Bit 7
6
5
4
3
2
1
Bit 0
Read:
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
Write:
Reset: 1
1
1
1
1
1
1
1
Figure 16-5. TIM Counter Modulo Registers (TMODH and TMODL)
NOTE: Reset the TIM counter before writing to the TIM counter modulo registers.
MC68HC08AS32 — Rev. 3.0
MOTOROLA
Timer Interface (TIM)
Advance Information
225