MC68HC11F1CFN4 Freescale Semiconductor, MC68HC11F1CFN4 Datasheet - Page 63

• Manufacturer Part Number: MC68HC11F1CFN4
• Description: IC MCU 512 EEPROM 4MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC11F1CFN4

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 30
• Program Memory Type: ROMless
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Program Memory Size: -

RTIF — Real-Time Interrupt Flag
Bits [5:4] — See 13.2 Pulse Accumulator Registers, page 65.
Bits [3:0] — Not implemented. Reads always return zero and writes have no effect.
PACTL — Pulse Accumulator Control
Bit 7 — Not implemented. Reads always return zero and writes have no effect.
Bits [6:4] — See 13.2 Pulse Accumulator Registers, page 65.
Bit 3 — Not implemented. Reads always return zero and writes have no effect.
I4/O5 — Configure TI4/O5 Register for IC or OC
RTR[1:0] — RTI Interrupt Rate Selects
MC68HC11F1/FC0
MC68HC11FTS/D
RESET:
Set periodically at a rate based on bits RTR[1:0] in the PACTL register.
These two bits select one of four rates for the real-time interrupt circuit, as shown in Table 32.
0 = OC5 function enabled
1 = IC4 function enabled
Frequency
E-Clock
1 MHz
2 MHz
3 MHz
4 MHz
5 MHz
6 MHz
Any E
Bit 7
0
0
PAEN
RTR [1:0] = %00
6
0
8.192 ms
4.906 ms
2.731 ms
2.048 ms
1.638 ms
1.366 ms
Freescale Semiconductor, Inc.
2
For More Information On This Product,
13
/E
PAMOD
Table 32 Real-Time Interrupt Periods
5
0
Go to: www.freescale.com
PEDGE
RTR [1:0] = 01
16.384 ms
4
0
8.192 ms
5.461 ms
4.096 ms
3.277 ms
2.731 ms
2
14
/E
3
0
0
RTR [1:0] = 10
32.768 ms
16.384 ms
10.923 ms
I4/O5
8.192 ms
6.554 ms
5.461 ms
2
0
2
15
/E
RTR1
1
0
RTR [1:0] = 11
65.536 ms
32.768 ms
21.845 ms
16.384 ms
13.107 ms
10.923 ms
RTR0
Bit 0
2
16
0
/E
$x026
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