EM78P809N
8-Bit Microcontroller
OSCI
Ext. Clock
OSCO
EM78P809N
Fig. 30. Crystal/Resonator Circuit
C1
OSCI
XTAL
RS
EM78P809N
OSCO
C2
Fig. 31. Crystal/Resonator Circuit
Table12. Capacitor Selection Guide for Crystal Oscillator or Ceramic Resonator
Oscillator Type
Frequency Mode
Frequency C1 (pF)
C2 (pF)
20~40
10~30
15~30
15
2.0 MHz
4.0 MHz
1.0MHz
2.0MHz
4.0MHz
20~40
10~30
15~30
15
Ceramic Resonator
HXT
Crystal Oscillator
HXT
15
15
33
0
33
0
C
OSCI
740
4
740
4
740
4
EM78P809N
XTAL
Fig. 32. Crystal/Resonator-Series Mode Circuit
56 •
Product Specification (V1.0) 07.26.2005
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
