MC68HC908AP8CB Freescale Semiconductor, MC68HC908AP8CB Datasheet - Page 75

• Manufacturer Part Number: MC68HC908AP8CB
• Description: IC MCU 8K FLASH 8MHZ 42SDIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908AP8CB

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, IRSCI, SCI, SPI
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 32
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 42-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

5.4 RC Oscillator
The RC oscillator circuit is designed for use with an external resistor and a capacitor.
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:
5.5 X-tal Oscillator
The crystal (x-tal) oscillator circuit is designed for use with an external 32.768kHz crystal to provide an
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:
Freescale Semiconductor
Figure
•
•
•
•
•
•
•
C
R
Crystal, X
Fixed capacitor, C
Tuning capacitor, C
Feedback resistor, R
Series resistor, R
EXT
EXT
5-6. This figure shows only the logical representation of the internal components and may not
See
STOP_RCLKEN
1
Chapter 22
MCU
(32.768kHz)
CONFIG2
S
1
for component value requirements.
(optional)
2
B
From SIM
(can also be a fixed capacitor)
SIMOSCEN
MC68HC908AP Family Data Sheet, Rev. 4
Figure 5-5. RC Oscillator
V
REG
EN
To Clock Selection MUX
RCCLK
RC OSCILLATOR
R
OSC1
EXT
C
EXT
BUS CLOCK
From SIM
OSC2
RC Oscillator
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