Motorola MC68HC908AB32 User Manual

Timer Interface Module B (TIMB)
I/O Registers
MC68HC908AB32 — Rev. 1.0 Technical Data
MOTOROLA Timer Interface Module B (TIMB) 213
12.10.3 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 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.
NOTE: Reset the TIMB counter before writing to the TIMB counter modulo
registers.
Address: $0042
Bit 7 654321Bit 0
Read: Bit 7 654321Bit 0
Write:
Reset: 00000000
= Unimplemented
Figure 12-6. TIMB Counter Register Low (TBCNTL)
Address: $0043
Bit 7 654321Bit 0
Read:
Bit 15 14 13 12 11 10 9 Bit 8
Write:
Reset: 11111111
Figure 12-7. TIMB Counter Modulo Register High (TBMODH)
Address: $0044
Bit 7 654321Bit 0
Read:
Bit 7 654321Bit 0
Write:
Reset: 11111111
Figure 12-8. TIMB Counter Modulo Register Low (TBMODL)

Motorola MC68HC908AB32 Specifications

General

Brand	Motorola
Model	MC68HC908AB32
Category	Controller
Language	English