HFC-S Cologne Chip AG, HFC-S Datasheet - Page 47

• Manufacturer Part Number: HFC-S
• Description: Isdn S/t HDLC Basic Rate Controller
• Manufacturer: Cologne Chip AG

7.3
Figure 11: Oscillator Circuitry
The values of C1, C2 and R1 depend on the used quartz.
For a load-free check of the oscillator frequency the C4O clock of the PCM30 bus should be
measured (HFC-S as master, S/T interface deactivated, 4.096 MHz frequency intented on the C4IO).
March 1997
Oscillator circuitry
C1
C2
R1
Q1
R2
OSC_IN
OSC_OUT
Part list:
Q1
R1
R2
C1, C2 47 pF
12.288 MHz quartz
330
1 M
47 of 57
HFC-S