ELAN Home Systems EM78P458 - Manual (Page 47)

EM78P458/459
OTP ROM
Table 13 Capacitor Selection Guide for Crystal Oscillator or Ceramic Resonators
Oscillator Type Frequency Mode Frequency C1(pF) C2(pF)
455 kHz 100~150 100~150
2.0 MHz 20~40 20~40
Ceramic
Resonators
HXT
4.0 MHz 10~30 10~30
32.768kHz 25 15
100KHz 25 25 LXT
200KHz 25 25
455KHz 20~40 20~150
1.0MHz 15~30 15~30
2.0MHz 15
15
Crystal Oscillator
HXT
4.0MHz 15 15
OSCI
7404
XTAL
7404 7404
330 330
C
EM78P458
EM78P459
Fig. 20 Circuit for Crystal/Resonator-Series Mode
OSCI
7404
7404
XTAL
C1 C2
10K 4.7K
Vdd
10K
10K
EM78P458
EM78P459
Fig. 21 Circuit for Crystal/Resonator-Parallel Mode
This specification is subject to change without prior notice. 07.01.2003 (V1.3) 47