PXB4219E Datasheet, PDF (279/290 Pages) Infineon Technologies AG – Interworking Element for 8 E1/T1 Lines

RTS values are generated as follows:
IWE8, V3.4
PXB 4219E, PXB 4220E, PXB 4221E
Appendix
T
f_s
Counter A
divided by N
RTS
Latch
f_n
—1x
f_nx
P-bit
counter C_t
T1817640-92
Figure 77 Generation of Residual Time Stamp (RTS) (Fig.6/ I.363.1)
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
279
2003-01-20