MC68HC908SR12CFA Freescale Semiconductor, MC68HC908SR12CFA Datasheet - Page 107

• Manufacturer Part Number: MC68HC908SR12CFA
• Description: MICROCONTROLLER 48 PIN
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908SR12CFA

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SCI
• Peripherals: LVD, POR, PWM, Temp Sensor
• Number Of I /o: 31
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: Q1145673

7.6 X-tal Oscillator
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
The X-tal oscillator circuit is designed for use with an external crystal or
ceramic resonator to provide an accurate clock source.
In its typical configuration, the X-tal oscillator is connected in a Pierce
oscillator configuration, as shown in
the logical representation of the internal components and may not
represent actual circuitry. The oscillator configuration uses five
components:
See
•
•
•
•
•
STOP_RCLKEN
MCU
Section 24.
CONFIG2
Crystal, X
Fixed capacitor, C
Tuning capacitor, C
Feedback resistor, R
Series resistor, R
for component value requirements.
From SIM
1
Oscillator (OSC)
SIMOSCEN
Figure 7-5. RC Oscillator
S
1
(optional)
2
B
(can also be a fixed capacitor)
V
DD
To Clock Selection MUX
EN
RCCLK
RC OSCILLATOR
R
OSC1
Figure
EXT
7-6. This figure shows only
C
EXT
BUS CLOCK
Oscillator (OSC)
From SIM
X-tal Oscillator
Data Sheet
OSC2
107