MC68HC705C8ACFNE Freescale Semiconductor, MC68HC705C8ACFNE Datasheet - Page 30

• Manufacturer Part Number: MC68HC705C8ACFNE
• Description: IC MCU 8K 2.1MHZ OTP 44-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705C8ACFNE

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: OTP
• Ram Size: 304 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• A/d Inputs: 4-Channel, 8-Bit
• Eeprom Memory: 0 Bytes
• Input Output: 24
• Interface: SCI/SPI
• Memory Type: OTP
• Number Of Bits: 8
• Package Type: 44-pin PLCC
• Programmable Memory: 8K Bytes
• Timers: 3-16-bit
• Voltage, Range: 3-5.5 V
• Processor Series: HC705C
• Core: HC05
• Data Bus Width: 8 bit
• Data Ram Size: 304 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 2.1 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 1
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: RoHS Compliant part

General Description
1.7.3 OSC1 and OSC2
1.7.3.1 Crystal Resonator
Technical Data
30
NOTE:
NOTE:
The OSC1 and OSC2 pins are the control connections for the 2-pin
on-chip oscillator. The oscillator can be driven by:
The frequency of the internal oscillator is f
internal oscillator output by two to produce the internal clock with a
frequency of f
The circuit in
crystal oscillator circuit for an AT-cut,
parallel resonant crystal. Follow the
crystal supplier’s recommendations,
because the crystal parameters
determine the external component
values required to provide reliable
startup and maximum stability. The
load capacitance values used in the
oscillator circuit design should
account for all stray layout
capacitances. To minimize output
distortion, mount the crystal and
capacitors as close as possible to the
pins.
Use an AT-cut crystal and not a strip or tuning fork crystal. The MCU
might overdrive or have the incorrect characteristic impedance for a strip
or tuning fork crystal.
•
•
•
Freescale Semiconductor, Inc.
For More Information On This Product,
Crystal resonator
Ceramic resonator
External clock signal
Go to: www.freescale.com
Figure 1-8
OP
General Description
.
shows a
Starting value only. Follow crystal supplier’s
recommendations regarding component
values that will provide reliable startup and
maximum stability.
22 pF
OSC
OSC1
Figure 1-8. Crystal
. The MCU divides the
Connections
MC68HC705C8A — Rev. 3
10 M
2 MHz
MCU
XTAL
OSC2
22 pF