Timing System
Timer structure
MC68HC11P2 — Rev 1.0
Technical Data
Timing System
+
&
Prescaler
÷ 1, 4, 8, 16
PR[1:0]
MCU
E clock
16-bit
free running counter
TCNT (hi) TCNT (lo)
TOC1 (lo)
&
9
TOC1 (hi)
16-bit comparator EQ
TOC2 (lo)
TOC2 (hi)
16-bit comparator EQ
TOC3 (lo)
TOC3 (hi)
16-bit comparator EQ
TOC4 (lo)
TOC4 (hi)
16-bit comparator EQ
TI4/O5 (lo)
TI4/O5 (hi)
16-bit comparator EQ
TIC1 (lo)
TIC1 (hi)
TIC2 (lo)
TIC2 (hi)
TIC3 (lo)
TIC3 (hi)
16-bit timer bus
16-bit latch
CLK
16-bit latch
CLK
16-bit latch
CLK
16-bit latch
CLK
OC1F
TOF
TOI
I4/O5F
8
OC2F
OC3F
OC4F
IC1F
IC2F
IC3F
I4/O5
OC5
IC4
OC1I
FOC1
Bit 7
+
&
7
OC2I
FOC2
+
&
6
OC3I
FOC3
+
&
5
OC4I
FOC4
+
&
4
I4/O5I
FOC5
&
IC1I
3
&
IC3I
1
&
IC2I
2
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PA6/
OC2/
OC1
PA5/
OC3/
OC1
PA4/
OC4/
OC1
PA3/
OC5/
OC1/
PA2/
IC1
IC4
PA1/
IC2
PA0/
IC3
TFLG1
status
flags
TMSK1
interrupt
enables
Port A
pin
control
Port A pin actions are controlled by OC1M, OC1D, PACTL, TCTL1 and TCTL2 registers
Pins/
functions
CFORC
Force O/P
compare
To pulse accumulator
Taps for RTI, COP and PA
Note
Interrupt requests 1–9 (these are further qualified by the I-bit in the CCR)
PA7/
OC1/
PAI
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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