MCR908JK1ECPE Freescale Semiconductor, MCR908JK1ECPE Datasheet - Page 67

• Manufacturer Part Number: MCR908JK1ECPE
• Description: IC MCU 1.5K FLASH 8MHZ 20-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MCR908JK1ECPE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 14
• Program Memory Size: 1.5KB (1.5K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.3 V
• Data Converters: A/D 12x8b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Processor Series: HC08JK
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Development Tools By Supplier: FSICEBASE, DEMO908JL16E, M68CBL05CE
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 12 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

Chapter 6
Oscillator (OSC)
6.1 Introduction
The oscillator module provides the reference clock for the MCU system and bus. Two types of oscillator
modules are available:
6.2 X-tal Oscillator (MC68HC908JL3E/JK3E/JK1E)
The X-tal oscillator circuit is designed for use with an external crystal or ceramic resonator to provide
accurate clock source.
In its typical configuration, the X-tal oscillator is connected in a Pierce oscillator configuration, as shown
in
represent actual circuitry. The oscillator configuration uses five components:
The series resistor (R
be required for all ranges of operation, especially with high frequency crystals. Refer to the crystal
manufacturer’s data for more information.
6.3 RC Oscillator (MC68HRC908JL3E/JK3E/JK1E)
The RC oscillator circuit is designed for use with external R and C to provide a clock source with tolerance
less than 10%.
In its typical configuration, the RC oscillator requires two external components, one R and one C.
Component values should have a tolerance of 1% or less, to obtain a clock source with less than 10%
tolerance. The oscillator configuration uses two components:
The RC connection is shown in
Freescale Semiconductor
Figure
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•
•
•
•
•
•
•
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MC68HC908JL3E/JK3E/JK1E — built-in oscillator module (X-tal) that requires an external crystal
or ceramic-resonator. This option also allows an external clock that can be driven directly into
OSC1.
MC68HRC908JL3E/JK3E/JK1E — built-in oscillator module (RC) that requires an external RC
connection only.
Crystal, X
Fixed capacitor, C
Tuning capacitor, C
Feedback resistor, R
Series resistor, R
C
R
EXT
EXT
6-1. This figure shows only the logical representation of the internal components and may not
1
S
) is included in the diagram to follow strict Pierce oscillator guidelines and may not
S
1
(optional)
2
B
(can also be a fixed capacitor)
Figure
MC68HC908JL3E Family Data Sheet, Rev. 4
6-2.
67