MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 208

• Manufacturer Part Number: MC68HC908AP16CFA
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Timebase Module (TBM)
12.5 Interrupts
Data Sheet
208
NOTE:
Do not change TBR[2:0] bits while the timebase is enabled
(TBON = 1).
TACK — Timebase ACKnowledge
TBIE — Timebase Interrupt Enabled
TBON — Timebase Enabled
The timebase module can interrupt the CPU on a regular basis with a
rate defined by TBR[2:0]. When the timebase counter chain rolls over,
the TBIF flag is set. If the TBIE bit is set, enabling the timebase interrupt,
the counter chain overflow will generate a CPU interrupt request. The
interrupt vector is defined in
Interrupts must be acknowledged by writing a logic 1 to the TACK bit.
Freescale Semiconductor, Inc.
The TACK bit is a write-only bit and always reads as 0. Writing a logic
1 to this bit clears TBIF, the timebase interrupt flag bit. Writing a logic
0 to this bit has no effect.
This read/write bit enables the timebase interrupt when the TBIF bit
becomes set. Reset clears the TBIE bit.
This read/write bit enables the timebase. Timebase may be turned off
to reduce power consumption when its function is not necessary. The
counter can be initialized by clearing and then setting this bit. Reset
clears the TBON bit.
For More Information On This Product,
1 = Clear timebase interrupt flag
0 = No effect
1 = Timebase interrupt enabled
0 = Timebase interrupt disabled
1 = Timebase enabled
0 = Timebase disabled and the counter initialized to 0’s
Go to: www.freescale.com
Table 2-1 . Vector
MC68HC908AP Family — Rev. 2.5
Addresses.
MOTOROLA