DS34S132GNA2+ Maxim Integrated, DS34S132GNA2+ Datasheet - Page 37

• Manufacturer Part Number: DS34S132GNA2+
• Description: Communication ICs - Various 32Port TDM-Over-Pack Transport Device
• Manufacturer: Maxim Integrated

Specifications of DS34S132GNA2+

• Rohs: yes
• Part # Aliases: 90-34S13+2N2

9.2.2.2
The T1/E1 Receive interface is controlled using the
functions (more of the
9.2.3 TDM Port Structure & Frame Formats
The TDM Ports support the Structured (with Framing) and Unstructured (without Framing) Formats. The Structured
Format is used by T1/E1 CES applications. The Unstructured Format is used by T1/E1 SAT and non-T1/E1 SAT
applications. The SAT/CES Format for each TDM Port is programmed using
The programmed SAT/CES Format for all RXP and TXP Bundles
be the same as the programmed SAT/CES Format for the TDM Port that they are assigned to.
The Structured Format (CES) is programmed to T1 or E1 Framing using
Multi-frame formats that are supported in the Structured Format (CES) are: no multi-frame, T1 SF, T1 ESF and E1
(selected using
pulse period is ~125 us (“193 bits/frame” for T1 or “256 bits/frame” period for E1) and CAS is not supported. For the
remaining CES settings the
period (for SF, ESF or E1 respectively) and CAS Signaling is included.
SFS and MFS should be set to be the same as that of the “local” external transceiver (e.g. T1/E1 Framer). The
MFS setting is a multi-frame setting to enable the CAS functions of the S132. The MFS setting may differ from the
external transceiver where the multi-frame format setting determines both the T1/E1 framing pattern and the CAS
Signaling format. For multi-frame, non-CAS applications the S132 MFS should be set for MFS = “no multi-frame”
(meaning no CAS multi-frame) and the external transceiver should be set to T1-SF, T1-ESF or E1. This will disable
the S132 CAS Signaling functions and the frame synchronization will only be used to frame align the Timeslots.
In most applications the T1/E1 format at both ends of a PW are the same (e.g. T1 SF to T1 SF). Some unusual T1
CAS applications may prefer to translate one T1 CAS format to the other (e.g. translate T1 SF CAS to T1 ESF
CAS). This function is a unidirectional S132 function that is implemented in the TXP direction using the TXP Bundle
Payload Multi-frame Format setting (B.BCDR1.SCTXDFSE; the RXP direction does not support translation). The
SCTXDFSE
setting is not used for E1 and T1 non-CAS applications). For T1 CAS applications the
from the MFS settings to provide a T1 CAS Multi-frame Format translation (or be the same for no translation). An
example T1 ESF CAS to SF CAS Translation is depicted in
provided in the “TDM CAS to Packet CAS Translation” section.
Figure 9-12. T1 ESF CAS to SF CAS Translation Example
Internally, the data for SAT/CES Bundles is processed using data that is stored in short term, Staging Buffers. The
buffers are filled and then forwarded. Each Staging Buffer is divided into fragments (blocks) of data. One Fragment
stores the SAT/CES data for a 125 us period
19-4750; Rev 1; 07/11
ESF
RSTS:
RDS:
RIES:
RSS:
CS:
T1
PRCR1.FFS & MFS = ESF
PTCR1.FFS & MFS = ESF
TDM Port Receive Interface
setting should always match the T1 CAS Format of the far end T1 PW termination end point (this
Pn.PRCR1.MFS
Select the receive framing to be synchronized to
Select
Select RDATn,
Select clock source to be
Select
PRCR1
RSYNCn
RDAT
TDM
TDM
Xmt
Port
Rcv
Port
RSYNC/TSYNC
S132
or
functions are described in the sub-sections that follow):
RSIGn
RSIG
direction to be input or output
and Pn.PTCR1.MFS). For CES with MFS = “no multi-frame” the
SCTXDFSE = SF
Bundle
Bundle
RXP
TXP
for TXP direction CAS Signaling interface
and
RCLKn
RSYNCn
periods are based on a “12 x 193 bit”, “24 x 193 bit” or “16 x 256 bit”
Direction
Direction
(TDAT
RXP
TXP
or
TCLKOn
Pn.PRCR1
timed to the positive or negative
or
PSN
RDAT
Direction
Direction
data).
Figure
TXP
RXP
and
RSYNCn
SCTXDFSE = SF
(B.BCDR4.RXBTS
Pn.PRCR2
Pn.PRCR1.BPF
9-12. More CAS translation information is
Pn.PRCR1.FFS
Bundle
Bundle
RXP
TXP
or internal transmit framing
Pn.PTCR1.SFS
S132
registers to program the following
RCLKn
SCTXDFSE
and B.BCDR3.TXBTS) must
and
TDM
TDM
Port
Xmt
Port
Rcv
DS34S132 DATA SHEET
PRCR1.FFS & MFS = ESF
PTCR1.FFS & MFS = ESF
and Pn.PTCR1.FFS. The
Pn.PTCR1.BPF
edge
and Pn.PRCR1.SFS.
setting can differ
RSYNC/TSYNC
37 of 194
SF
T1
specify