PEB2086N 参数 Datasheet PDF下载

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

PEB 2086

R

ISAC -S

TE

PEB 2086

CP

R

ISAC -S

LT-S,NT

X2

4 kHz

M-Bit

ITS03735

M-Bit

X2

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