MC68HC705T16 MOTOROLA [Motorola, Inc], MC68HC705T16 Datasheet - Page 48
MC68HC705T16
Manufacturer Part Number
MC68HC705T16
Description
High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC705T16.pdf
(128 pages)
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5
When IEDG is set, a positive-going edge on the TCAP pin will trigger a transfer of the free-running
counter value to the input capture registers. When clear, a negative-going edge triggers the
transfer.
5.1.5
The Timer Status register contains the status bits for the above four interrupt conditions - ICF,
OC0F, OC1F, TOF.
Accessing the timer status register satisfies the first condition required to clear the status bits. The
remaining step is to access the register corresponding to the status bit.
ICF - Input Capture Flag
This bit is set when the selected polarity of edge is detected by the input capture edge detector;
an input capture interrupt will be generated, if ICIE is set, ICF is cleared by reading the TSR and
then the Input Capture Low register ($13)
OC0F - Output Compare 0 Flag
OC0F will be set when its output compare 0 register contents match that of the free-running
counter; an output compare interrupt will be generated, if OC0IE is set. OC0F is cleared by
reading the TSR and then the Output Compare 0 Low register ($15).
OC1F - Output Compare 1 Flag
OC0F will be set when its output compare 1 register contents match that of the free-running
counter; an output compare interrupt will be generated, if OC1IE is set. OC1F is cleared by
reading the TSR and then the Output Compare 1 Low register ($17).
MOTOROLA
5-6
1 (set)
0 (clear) –
1 (set)
0 (clear) –
1 (set)
0 (clear) –
Address
$11
Timer Status Register (TSR)
–
–
–
bit 7
ICF
A valid input capture has occurred.
No input capture has occurred.
A valid output compare has occurred on output compare 0 register.
No output compare has occurred on output compare 0 register.
A valid output compare has occurred on output compare 1 register.
No output compare has occurred on output compare 1 register.
OC0F
bit 6
OC1F
bit 5
bit 4
TOF
TIMERS
TCAPS
bit 3
bit 2
bit 1
bit 0
0000 u000
on reset
MC68HC05T16
State
TPG
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