mc68hc11d0cfn2 Freescale Semiconductor, Inc, mc68hc11d0cfn2 Datasheet - Page 113

• Manufacturer Part Number: mc68hc11d0cfn2
• Description: M68hc11 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

8.6 Computer Operating Properly Watchdog Function
8.7 Pulse Accumulator
MC68HC711D3 — Rev. 2
MOTOROLA
PAI/OC1
PA7/
MAIN TIMER
(FROM MAIN TIMER)
FROM
OC1
E ÷ 64 CLOCK
OUTPUT
BUFFER
The clocking chain for the COP function, tapped off of the main timer divider chain,
is only superficially related to the main timer system. The CR1 and CR0 bits in the
OPTION register and the NOCOP bit in the CONFIG register determine the status
of the COP function. Refer to
Modes
The MC68HC711D3 has an 8-bit counter that can be configured to operate either
as a simple event counter or for gated time accumulation, depending on the state
of the PAMOD bit in the PACTL register. Refer to the pulse accumulator block
diagram,
EDGE DETECTION
INPUT BUFFER
PACTL CONTROL
Freescale Semiconductor, Inc.
for a more detailed discussion of the COP function.
AND
For More Information On This Product,
Figure
TMSK2 INT ENABLES
Figure 8-19. Pulse Accumulator
8-19.
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Programmable Timer
Section 4. Resets, Interrupts, and Low-Power
Computer Operating Properly Watchdog Function
MUX
2:1
INTERNAL
DATA BUS
PAI EDGE
PAEN
TFLG2 INTERRUPT STATUS
OVERFLOW
ENABLE
8-BIT COUNTER
PACNT
Programmable Timer
FLAG SETTING
DISABLE
INTERRUPT
REQUESTS
1
2
Data Sheet
113