MC68HC11K1CFN4 Freescale Semiconductor, MC68HC11K1CFN4 Datasheet - Page 203

• Manufacturer Part Number: MC68HC11K1CFN4
• Description: IC MCU 640 EEPROM 4MHZ 84-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC11K1CFN4

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 37
• Program Memory Type: ROMless
• Eeprom Size: 640 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 84-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Program Memory Size: -

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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