PXB4220E Infineon Technologies AG, PXB4220E Datasheet - Page 279

• Manufacturer Part Number: PXB4220E
• Description: Interworking Element for 8 E1/T1 Lines
• Manufacturer: Infineon Technologies AG

RTS values are generated as follows:
Figure 77
The transformation of RTS values in a clock is not specified in the SRTS specifications.
Basically (the implementation is slightly different), the ICRC calculates another RTS
value based on the transmit clock. The difference between received RTS values and
locally calculated RTS values, drives a DCO. This solution can be described as a PLL
with an unusual phase comparator.
Data Sheet
f
f
s
n
Generation of Residual Time Stamp (RTS) (Fig.6/ I.363.1)
Counter A
divided by N
—
1
x
279
T
PXB 4219E, PXB 4220E, PXB 4221E
f
nx
P-bit
counter C
Latch
T1817640-92
t
IWE8, V3.4
Appendix
2003-01-20
RTS