mc68hc11f1cpu3 Freescale Semiconductor, Inc, mc68hc11f1cpu3 Datasheet - Page 117

• Manufacturer Part Number: mc68hc11f1cpu3
• Description: Mc68hc11f1 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

9.3.8 Timer Interrupt Flag Register 1
TFLG1 — Timer Interrupt Flag 1
OC1F–OC4F — Output Compare x Flag
I4/O5F — Input Capture 4/Output Compare 5 Flag
IC1F–IC3F — Input Capture x Flag
9.3.9 Timer Interrupt Mask Register 2
TMSK2 — Timer Interrupt Mask 2
TOI — Timer Overflow Interrupt Enable
RTII — Real-Time Interrupt Enable
PAOVI — Pulse Accumulator Overflow Interrupt Enable
PAII — Pulse Accumulator Input Edge Interrupt Enable
PR[1:0] — Timer Prescaler Select
TECHNICAL DATA
RESET:
RESET:
Bits in this register indicate when timer system events have occurred. Coupled with
the bits of TMSK1, the bits of TFLG1 allow the timer subsystem to operate in either a
polled or interrupt driven system. Each bit of TFLG1 corresponds to a bit in TMSK1 in
the same position.
Clear flags by writing a one to the corresponding bit position(s).
Set each time the counter matches output compare x value
Set by IC4 or OC5, depending on the function enabled by I4/O5 bit in PACTL
Set each time a selected active edge is detected on the ICx input line
Use this 8-bit register to enable or inhibit timer overflow and real-time interrupts. The
timer prescaler control bits are included in this register.
Refer to 9.4 Real-Time Interrupt.
Refer to 9.6.3 Pulse Accumulator Status and Interrupt Bits.
Refer to 9.6.3 Pulse Accumulator Status and Interrupt Bits.
These bits are used to select the prescaler divide-by ratio. In normal modes, PR[1:0]
can only be written once, and the write must be within 64 cycles after reset. Refer to
Table 9-1 and Table 9-4 for specific timing values.
0 = TOF interrupts disabled
1 = Interrupt requested when TOF is set to one
OC1F
Bit 7
Bit 7
TOI
0
0
OC2F
RTII
6
0
6
0
Freescale Semiconductor, Inc.
For More Information On This Product,
PAOVI
OC3F
5
0
5
0
Go to: www.freescale.com
TIMING SYSTEM
OC4F
PAII
4
0
4
0
I4/O5F
—
0
0
3
3
IC1F
—
2
0
2
0
IC2F
PR1
1
0
1
0
IC3F
Bit 0
Bit 0
PR0
0
0
$1023
$1024
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