peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 356

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

Semiconductor Group
6.3
6.3.1
An external reference clock is selected, e.g. 1.536 MHz from QUAT-S in LT-T mode.
Figure 6-5
The QUAT-S provides a synchronous 1.536 MHz clock (adaptive timing recovery).
A synchronized DOC generates PFS, PDC2, PDC4, PDC8, FSC and DCL.
The PFS length must be at least 3 DCL period long when the PFS is used for IOM-2
synchronization (instead of FSC). A short pulse would be interpreted as a sync. pulse for
Multiframe synchronization.
S-Interface
192 kHz
TE
Clock Generation
PBX with one DOC
Clock Generation in a PBX with one DOC
QUAT
LT-S
R
-S
IOM -2
Interface
FSC 8 kHz
DCL
4.096 MHz
R
7.68 MHz
6-6
CLK7
PEB 20560
QUAT
DOC
LT-T
R
-S
XCLK
1.536 MHz
T-Interface
192 kHz
PFS
PDC2
PDC4
PDC8
REFCLC
Master
Central
Office
Applications
PEB 20560
ITS10112
2003-08