MC68HC11F1CFN4 Freescale Semiconductor, MC68HC11F1CFN4 Datasheet - Page 18

• 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: -

2-4
The XTAL pin is normally left unterminated when an external CMOS compatible clock
is connected to the EXTAL pin. However, a 10 k
from the XTAL output to ground can be used to reduce RFI noise emission.
The XTAL output is normally used to drive a crystal. The XTAL output can be buffered
with a high-impedance buffer, or it can be used to drive the EXTAL input of another
M68HC11 device. Refer to Figure 2-6 .
In all cases, use caution when designing circuitry associated with the oscillator pins.
Load capacitances shown in the oscillator circuits include all stray layout capacitanc-
es. Refer to Figure 2-4, Figure 2-5, and Figure 2-6.
FIRST
MCU
EXTAL
*
XTAL
Values include all stray capacitances.
Figure 2-5 External Oscillator Connections
Figure 2-6 One Crystal Driving Two MCUs
Figure 2-4 Common Crystal Connections
Freescale Semiconductor, Inc.
10M
For More Information On This Product,
MCU
MCU
CRYSTAL
4 x E
EXTAL
*
XTAL
Go to: www.freescale.com
Values include all stray capacitances.
EXTAL
XTAL
PIN DESCRIPTIONS
10M
25 pF
25 pF
10 k – 100 k
NC OR
LOAD
*
*
CRYSTAL
4 x E
CMOS-COMPATIBLE
EXTERNAL
OSCILLATOR
to 100 k
10 k – 100 k
25 pF
25 pF
NC OR
LOAD
220
*
*
load resistor connected
EXTAL
XTAL
TECHNICAL DATA
SECOND
MCU
MC68HC11F1