Functional Description
2.5.9
S-Frame and Multiframe Synchronization (PEB 2086 only)
The PEB 2086 offers the capability to control the start of the S-frame as well as the start of the
multiframe from external signals. Applications which require synchronization between different
S-interfaces are possible. Such an application is the connection of DECT base stations to PBX
line cards.
S-Interface
CP
X2
4 kHz
M-Bit
PEB 2086
ISAC R -S
TE
PEB 2086
ISAC R -S
LT-S,NT
M-Bit
X2
ITS03735
Figure 54
Multiframe Synchronization using the M-Bit
2.5.9.1 S-Frame Start (LT-S, NT mode)
The CP-input can be used as S-frame trigger. Therefore, a 4 kHz signal must be applied.
If no signal is applied (CP = 0) the S-frames are triggerd internally.
2.5.9.2 Multiframe / Superframe Synchronization (LT-S, NT-Mode)
The X2 pin can be used to synchronize the multiframe structure between several
S-transceivers. Multiframe generation must be enabled.
The value of X2 is sampled at the falling edge of CP or at the start of the F-bit of the S-frame
whatever occurs earlier.
If the input on X2 is "1", the multiframe counter is reset to frame no.1 and as a result, the M-bit
is transmitted as "1".
Semiconductor Group
102
INFINEON [ Infineon ]
