MC68HC08AZ32A Datasheet, PDF (267/312 Pages) Motorola, Inc – HCMOS Microcontroller Unit

I/O Registers
18.8.3 TIMB Counter Modulo Registers
The read/write TIMB modulo registers contain the modulo value for the TIMB counter. When the TIMB
counter reaches the modulo value, the overflow flag (TOF) becomes set and the TIMB counter resumes
counting from $0000 at the next timer clock. Writing to the high byte (TBMODH) inhibits the TOF bit and
overflow interrupts until the low byte (TBMODL) is written. Reset sets the TIMB counter modulo registers.
Register Name and Address
TBMODH — $0043
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Bit 15
14
13
12
11
10
Write:
Reset: 1
1
1
1
1
1
9
Bit 8
1
1
Register Name and Address
TBMODL — $0044
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Bit 7
6
5
4
3
2
1
Bit 0
Write:
Reset: 1
1
1
1
1
1
1
1
Figure 18-7. TIMB Counter Modulo Registers (TBMODH and TBMODL)
NOTE
Reset the TIMB counter before writing to the TIMB counter modulo registers.
MC68HC08AZ32A Data Sheet, Rev. 2
Freescale Semiconductor
267