MC68HC08JK1 Datasheet, PDF (189/198 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Electrical Specifications
3V Oscillator Characteristics
18.11 3V Oscillator Characteristics
Table 18-9. Oscillator Component Specifications (3V)
Characteristic
Symbol Min
Typ
Max
Crystal frequency, XTALCLK
f_OSCXCLK
—
8
16
RC oscillator frequency, RCCLK
f_RCCLK
2
8
12
External clock
reference frequency⁽¹⁾
f_OSCXCLK
dc
—
16
Crystal load capacitance⁽²⁾
C_L
—
—
—
Crystal fixed capacitance⁽²⁾
C₁
—
2 × C_L
—
Crystal tuning capacitance⁽²⁾
C₂
—
2 × C_L
—
Feedback bias resistor
R_B
—
10 MΩ
—
Series resistor^{(2), (3)}
R_S
—
—
—
RC oscillator external R
R_EXT
See Figure 18-2
RC oscillator external C
C_EXT
—
10
—
NOTES:
1. No more than 10% duty cycle deviation from 50%
2. Consult crystal vendor data sheet
3. Not Required for high frequency crystals
Unit
MHz
MHz
MHz
pF
14
12
10
8
6
4
2
0
0
C_EXT = 10 pF
3V @ 25°C
MCU
OSC1
V_DD
R_EXT
C_EXT
10
20
30
40
50
Resistor, R_EXT (kΩ)
Figure 18-2. RC vs. Frequency (3V @25°C)
MC68H(R)C08JL3 — Rev. 4
MOTOROLA
Electrical Specifications
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Technical Data
189