Freescale Semiconductor, Inc.
Modes of Operation and Pin Descriptions
MCU
OSC1
OSC2
RP
OSC1
L
C1
RS
C0
COSC1
COSC2
(a) Crystal/ceramic resonator
oscillator connections
(b) Crystal equivalent circuit
MCU
OSC1
OSC2
OSC2
External
NC
clock
(c) External clock source connections
Crystal
2MHz 4MHz Unit
RS(max) 400
75
Ω
C0
5
7
pF
C1
8
12
ƒF
COSC1 15 – 40 15 – 30 pF
COSC2 15 – 30 15 – 25 pF
RP
10
10
MΩ
Q
30 000 40 000 —
Ceramic resonator
2 – 4MHz Unit
RS(typ)
10
Ω
C0
40
pF
C1
4.3
pF
COSC1
30
pF
COSC2
30
pF
RP
1 – 10
MΩ
Q
1250
—
(e) Crystal and ceramic resonator parameters
Figure 5 Oscillator connections
MC68HC05E6 — Rev. 1.0
8-pin
Modes of Operation and Pin Descriptions
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