PEB20571 INFINEON [Infineon Technologies AG], PEB20571 Datasheet - Page 88

• Manufacturer Part Number: PEB20571
• Description: ICs for Communications
• Manufacturer: INFINEON [Infineon Technologies AG]

4.2.3
During startup the VIP requires 3 frames with the right FSC and DCL_2000 to
synchronize to the DELIC. During this time the VIP is not able to detect commands or
data from the DELIC.
4.2.4
4.2.4.1
The framing (F) bit is recognized on the IOM-2000 interface, when both data and control
bits are equal to ‘1’. In the transmit direction the data and control bits are inserted by the
TRANSIU at the beginning of every transmitted frame; in the receive direction the
framing bit is used for frame start recognition.
4.2.4.2
In S/T interface, the multiframe includes 20 S/T frames. The start of a multiframe is
indicated by the M- and F
set to ‘1’ in every 5-th frame).
The S/Q channel provides the additional capability for data exchange between LT-S and
TE or between the Central Office (CO) and the LT-T at the multiframe level. In the LT-S-
to-TE direction the S-channel (S-bit in S/T frame) is used. In the opposite direction (TE
to LT-S) the data is transferred on the Q-channel. The Q-bits are defined to be the bits
in the F
TE to LT-S direction. A multiframe is provided for structuring the Q-bits in groups of four
(Q1-Q4).
The Q- and S-channel coding with respect to the frame number is shown in Table 4-2.
Figure 4-2
Preliminary Data Sheet
a
TE
bit position of every 5-th frame. The Q-bit position is identified by F
Initialization of VIP
S/T Mode Control and Framing Bits on IOM-2000
Framing Bit (F-Bit)
Multiframing Bits
S/Q Channel Assignment
Q
S
LT-S
a
-bits (the M-bit is set to ‘1’ in every 20-th frame, the F
VIP
LT-T
IOM-2000
4-4
DELIC
Functional Description
Q
S
PEB 20571
a
CO
= ‘1’ in the
DELIC
2003-08
a
-bit is