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| HC05 Datasheet, PDF (38/232 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit | |||
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L
C1 RS
2
OSC1
OSC2
MCU
OSC1
OSC2
COSC1
COSC2
(a) Crystal/ceramic resonator
oscillator connections
C0
(b) Crystal equivalent circuit
MCU
OSC1
OSC2
External
NC
clock
(c) External clock source connections
Crystal
2MHz 4MHz Unit
RS(max) 400
75
W
C0
5
7
pF
C1
8
12
ÆF
COSC1 15 â 40 15 â 30 pF
COSC2 15 â 30 15 â 25 pF
Q
30 000 40 000 â
Ceramic resonator
2 â 4MHz Unit
RS(typ)
10
W
C0
40
pF
C1
4.3
pF
COSC1
30
pF
COSC2
30
pF
Q
1250
â
(d) Typical crystal and ceramic resonator parameters
Figure 2-6 Oscillator connections
MOTOROLA
2-14
MODES OF OPERATION AND PIN DESCRIPTIONS
MC68HC05X16
Rev. 1
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