MC68HC908LB8CPE Freescale Semiconductor, MC68HC908LB8CPE Datasheet - Page 24

• Manufacturer Part Number: MC68HC908LB8CPE
• Description: IC MCU 8K FLASH 8MHZ 20DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908LB8CPE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: LVR, POR, PWM
• Number Of I /o: 18
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 7x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -

General Description
1.7 System Clock Distribution
Some of the modules inside the MCU use different clock sources.
connection diagram. The OSC supplies the clock sources:
24
V
DD
•
R
EXT
BUSCLKX4 is the basic reference clock of the device. It is either:
–
–
–
–
The external crystal oscillator
An external clock source
An external RC oscillator
The internal oscillator
OSC
XRC
IRC
MUX
Figure 1-3. System Clock Distribution Diagram
BUSCLKX4
MC68HC908LB8 Data Sheet, Rev. 1
SIM
÷2
÷4
BUSCLKX4
BUSCLKX2
BUSCLK
CPU
FLASH
PWM
Figure 1-3
HRP
RAM
shows a simplified clock
MON ROM
COP
Freescale Semiconductor
TIM
PROGRAMMING
FLASH
ROM
ADC
KBI