MC68HC08AB16A Datasheet, PDF (179/380 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Timer Interface Module A (TIMA)
I/O Registers
Address: $0023
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
= Unimplemented
Figure 11-6. TIMA Counter Register Low (TACNTL)
11.10.3 TIMA Counter Modulo Registers
The read/write TIMA modulo registers contain the modulo value for the
TIMA counter. When the TIMA counter reaches the modulo value, the
overflow flag (TOF) becomes set, and the TIMA counter resumes
counting from $0000 at the next clock. Writing to the high byte
(TAMODH) inhibits the TOF bit and overflow interrupts until the low
byte (TAMODL) is written. Reset sets the TIMA counter modulo
registers.
Address: $0024
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Bit 15
14
13
Write:
12
11
10
9
Bit 8
Reset: 1
1
1
1
1
1
1
1
Figure 11-7. TIMA Counter Modulo Register High (TAMODH)
Address: $0025
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 11-8. TIMA Counter Modulo Register Low (TAMODL)
NOTE: Reset the TIMA counter before writing to the TIMA counter modulo
registers.
MC68HC08AB16A — Rev. 2.0
MOTOROLA
Timer Interface Module A (TIMA)
For More Information On This Product,
Go to: www.freescale.com
Technical Data
179