PEB20570FV31XP Lantiq, PEB20570FV31XP Datasheet - Page 97

• Manufacturer Part Number: PEB20570FV31XP
• Manufacturer: Lantiq

Specifications of PEB20570FV31XP

• Lead Free Status / Rohs Status: Compliant

4.2.7
4.2.7.1
On the U
In the transmit direction the LF-bit is inserted by the TRANSIU at the beginning of every
transmitted U
first '1' (LF-bit) in the data stream on IOM-2000 DX line together with the 8 kHz IOM-2000
FSC pulse. This is required due to the 8 kHz clock rate of the FSC signal in comparison
to the 4 kHz frame length in the U
The code violation in the LF position is generated by the VIP when INFO1 is transmitted,
according to the DSP command bits SMINI(2:0).
In the receive direction the first ‘1’ recognized on the line after “no signal”, which is
represented by logical ‘0’, is treated as the LF-bit. The code violation in the LF-bit position
is recognized by the VIP when INFO 2 is received. This information is forwarded to the
DELIC as part of the VIP receiver status bits RxSTA(1:0).
4.2.7.2
On the U
included at the M-bit position. Every fourth M-bit, a code violation indicates the start of a
new multiframe.
In transmit direction, the VIP extracts the multiframe bits out of the IOM-2000 data
coming from DELIC and inserts them in the U
In receive direction, the VIP extracts the multiframe bits out of the data coming from the
U
A multiframe counter in the VIP guarantees the timing of the multiframe. It is
synchronized (reset) every 20th U
command bit ’SH_FSC’ issued by the DELIC.
Note: The SH_FSC bit performs the functionality of the short FSC pulse in OCTAT-P
T-bit
The T-bit received on the U
(DR) line at the multiframe (M-bit) position in every frame; i.e. not only at the usual T-bit
position every third frame, but also at the S-bit position and the code violation (CV)
position.In transmit direction, the T-bit value is sent in the data stream from the DELIC
to the VIP, and passed on transparently to the U
programmed in DELIC’s data RAM. It is required e.g. for DECT synchronization.
Data Sheet
PN
line and inserts them in the IOM-2000 frame to the DELIC.
and QUAT-S.
PN
PN
U
Framing Bit (LF-Bit)
Multiframing Bit (M-Bit)
interface the framing (LF) bit is always logical ‘1’.
interface multiframes are composed of four U
PN
PN
frame. The VIP assumes the start of the U
Framing Bit Description
PN
line is inserted by the VIP in the IOM-2000 data receive
PN
PN
interface.
frame (=every 40th IOM-2000 frame) by the
80
PN
frame at the line side.
PN
terminal. The T-bit value may be
PN
PN
frames. The multiframe is
frame when detecting the
Functional Description
PEB 20570
PEB 20571
2003-07-31