mc68hc908qf4 Freescale Semiconductor, Inc, mc68hc908qf4 Datasheet - Page 180

• Manufacturer Part Number: mc68hc908qf4
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Electrical Specifications
17.8 Oscillator Characteristics
Data Sheet
180
Internal oscillator frequency
Crystal frequency, XTALCLK
External RC oscillator frequency, RCCLK
External clock reference frequency
Crystal load capacitance
Crystal fixed capacitance
Crystal tuning capacitance
Feedback bias resistor
Series resistor
RC oscillator external resistor
1. Bus frequency, f
2. No more than 10% duty cycle deviation from 50%.
3. Consult crystal vendor data sheet.
12
10
8
6
4
2
0
0
Characteristic
OP
Figure 17-4. Typical RC Oscillator Frequency versus R
10
, is oscillator frequency divided by 4.
(3)
(3)
(3)
(1)
(1)
20
Freescale Semiconductor, Inc.
(1), (2)
For More Information On This Product,
R
EXT
(1)
30
(KΩ)
Go to: www.freescale.com
Electrical Specifications
40
f
f
Symbol
OSCXCLK
OSCXCLK
f
f
INTCLK
RCCLK
R
R
R
C
C
C
EXT
50
B
S
L
1
2
60
Min
270
30
dc
—
—
—
—
—
2
3V
2.3V
See
Figure 17-4
32.768
2 x C
2 x C
12.5
Typ
330
4.0
—
—
10
EXT
L
L
V
MC68HC908QF4 — Rev. 1.0
(25°C)
DD
Max
R
100
360
—
—
—
—
—
EXT
8
8
MCU
OSC1
MOTOROLA
MHz
MHz
MHz
Unit
kHz
MΩ
pF
kΩ
—
—
—