MC68HC908SR12CFA Freescale Semiconductor, MC68HC908SR12CFA Datasheet - Page 378

• 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

Electrical Specifications
24.10 5.0V Oscillator Characteristics
Data Sheet
378
Notes:
Internal oscillator clock frequency
External reference clock to OSC1
Crystal reference frequency
Crystal load capacitance
Crystal fixed capacitance
Crystal tuning capacitance
Feedback bias resistor
Series resistor
External RC clock frequency
External resistor
External capacitor
1. No more than 10% duty cycle deviation from 50%.
2. Fundamental mode crystals only.
3. Consult crystal manufacturer’s data.
4. Not Required for high frequency crystals.
5
4
3
2
1
0
0
(4)
Characteristic
2
(3)
Figure 24-1. RC vs. Bus Frequency (5V @25°C)
(2)
Table 24-8. 5V Oscillator Specifications
(1)
Resistor R
4
Electrical Specifications
EXT
(kΩ)
6
Symbol
f
RCCLK
f
R
C
f
f
XCLK
ICLK
OSC
R
R
C
C
C
EXT
EXT
L
1
2
B
S
C
5V @ 25°C
EXT
= 10 pF
8
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
19.2k
Min
2M
dc
—
—
—
—
—
—
See
10
2 × C
2 × C
32.768k
Figure 24-1
100k
10M
Typ
24k
10
V
—
—
—
L
L
DD
(25p)
(25p)
f
RCCLK
Freescale Semiconductor
R
EXT
= f
OSC1
4.9152M
28.8k
OP
20M
18M
Max
—
—
—
—
—
—
× 4
MCU
C
EXT
Unit
Hz
Hz
Hz
Hz
pF
Ω
Ω
Ω
F
F