mc68hc908as60 Freescale Semiconductor, Inc, mc68hc908as60 Datasheet - Page 393

• Manufacturer Part Number: mc68hc908as60
• Description: Mc68hc908as60 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

22.9.1 TIMA Status and Control Register
MC68HC908AS60 — Rev. 1.0
Address:
The TIMA status and control register:
TOF — TIMA Overflow Flag Bit
TOIE — TIMA Overflow Interrupt Enable Bit
Reset:
Read:
Write:
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•
•
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This read/write flag is set when the TIMA counter resets to $0000 after
reaching the modulo value programmed in the TIMA counter modulo
registers. Clear TOF by reading the TIMA status and control register
when TOF is set and then writing a logic 0 to TOF. If another TIMA
overflow occurs before the clearing sequence is complete, then
writing logic 0 to TOF has no effect. Therefore, a TOF interrupt
request cannot be lost due to inadvertent clearing of TOF. Reset
clears the TOF bit. Writing a logic 1 to TOF has no effect.
This read/write bit enables TIMA overflow interrupts when the TOF bit
becomes set. Reset clears the TOIE bit.
Freescale Semiconductor, Inc.
Figure 22-4. Timer A Status and Control Register (TASC)
For More Information On This Product,
1 = TIMA counter has reached modulo value.
0 = TIMA counter has not reached modulo value.
1 = TIMA overflow interrupts enabled
0 = TIMA overflow interrupts disabled
Enables TIMA overflow interrupts
Flags TIMA overflows
Stops the TIMA counter
Resets the TIMA counter
Prescales the TIMA counter clock
$0020
Bit 7
TOF
Timer Interface Module A (TIMA-6)
R
0
0
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= Reserved
TOIE
6
0
TSTOP
5
1
TRST
4
0
0
Timer Interface Module A (TIMA-6)
R
3
0
0
PS2
2
0
PS1
1
0
Technical Data
I/O Registers
Bit 0
PS0
0