PEB 2091
PEF 2091
Functional Description
3.7.4.1 NT Repeater
XIN/XOUT
A free running crystal or other clock source shall provide a 15.36-MHz base clock (see
also "External Circuitry", page 249 for more informations about crystal properties).
CLS
In this mode version 5.3 provides an unsychronized 15.36 MHz clock on CLS. This clock
can be used by the PLL as a base clock. It is also available in power down.
3.7.4.2 LT Repeater
XIN/XOUT
Pin XOUT should be left open.
The synchronized 15.36 MHz clock should be provided on pin XIN.
The dynamic characteristics of this clock are described in "LT Modes", page 281.
Clock CLS
In this mode a 512 kHz clock is provided on CLS. This clock signal is not synchronous
to the received U-interface signal. It is also available in power down.
3.7.5
COT-512 and COT-1536 Mode
U
U
XIN
XOUT
XIN
XOUT
CLS=7680 kHz
FSC=8 kHz
DCL=512 kHz
CLS=7680 kHz
FSC=8 kHz
DCL=1536 kHz
Interface
Interface
COT-512
COT-1536
Figure 36
Clocks in COT-1536 Mode
Figure 36
Clocks in COT-512 Mode
Because pair gain systems do not need to synchronize onto a PTT-master clock, a free
running 15.36-MHz system clock may be used at the exchange side. In COT mode the
Semiconductor Group
88
Data Sheet 01.99
INFINEON [ Infineon ]
