MC68HC711K4CFN3 Freescale Semiconductor, MC68HC711K4CFN3 Datasheet - Page 203

• Manufacturer Part Number: MC68HC711K4CFN3
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC711K4CFN3

• Cpu Family: HC11
• Device Core Size: 8b
• Frequency (max): 4MHz
• Interface Type: SCI/SPI
• Program Memory Type: ROM
• Program Memory Size: 24KB
• Total Internal Ram Size: 768Byte
• Number Of Timers - General Purpose: 8
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 84
• Package Type: PLCC
• Lead Free Status / Rohs Status: Not Compliant

9.7 Pulse Accumulator (PA)
M68HC11K Family
MOTOROLA
Maximum event
Gated mode count
Gated mode count
counting frequency
resolution
overflow
E Clock Freq.
EXTAL Freq.
OC1D[7:3] — Output Compare Data Bits
The pulse accumulator can be used either to count events or measure
the duration of a particular event. In event counting mode, the pulse
accumulator’s 8-bit counter increments each time a specified edge is
detected on the pulse accumulator input pin, PA7. The maximum
clocking rate for this mode is E clock divided by two. In gated time
accumulation mode, an internal clock increments the 8-bit counter at a
rate of E clock divided by 64 while the input at PA7 remains at a
predetermined logic level.
periods for three common crystal frequencies.
Figure 9-21
8.192 s
8.0 MHz
2.0 MHz
1.0 MHz
32.0 s
Freescale Semiconductor, Inc.
Table 9-5. Pulse Accumulator Timing
For More Information On This Product,
0 = Corresponding port A pin is cleared on successful OC1
1 = Corresponding port A pin is set on successful OC1 compare if
compare if the corresponding OC1M bit is set.
the corresponding OC1M bit is set.
Go to: www.freescale.com
is a block diagram of the pulse accumulator.
12.0 MHz
5.461 s
3.0 MHz
1.5 MHz
21.3 s
EXTAL Frequencies
Timing System
16.0 MHz
4.096 s
4.0 MHz
2.0 MHz
16.0 s
Table 9-5
shows pulse accumulator clock
20.0 MHz
3.277 s
5.0 MHz
2.5 MHz
12.8 s
24.0 MHz
2.731 s
6.0 MHz
3.0 MHz
10.7 s
Pulse Accumulator (PA)
Timing System
Technical Data
EXTAL
EXTAL
2
2
Other
E
14
6
2
E
E
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