XC68HC705F32 Motorola, XC68HC705F32 Datasheet - Page 66

• Manufacturer Part Number: XC68HC705F32
• Description: MICROCONTROLLER
• Manufacturer: Motorola

6
When using the timer overflow function and reading the free-running counter at random times to
measure an elapsed time, a problem may occur whereby the timer overflow flag is unintentionally
cleared if:
Reading the alternate counter register instead of the counter register will avoid this potential
problem.
TCAP1 — Timer capture 1 status flag
This bit reflects the status of the timer capture 1 input.
TCAP2 — Timer capture 2 status flag
This bit reflects the status of the timer capture 2 input.
OC2F — Output compare 2 flag
This bit is set when the output compare register 2 contents match those of the free-running
counter; an output compare interrupt will be generated if OC2IE is set. OC2F is cleared by reading
the TSR and then the output compare 2 low register ($0027).
MOTOROLA
6-8
1 The timer status register is read or written when TOF is set, and
2 The LSB of the free-running counter is read, but not for the purpose of
1 (set)
0 (clear) –
servicing the flag.
–
A valid output compare has occurred.
No output compare has occurred.
16-BIT PROGRAMMABLE TIMER
MC68HC05F32
TPG