DS34S132GNA2+ Maxim Integrated, DS34S132GNA2+ Datasheet - Page 41

• 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

ESF formats. For the T1 SF format this means that two successive 2-bit CAS Codes from 2 consecutive SF frames
are stored.
For T1 ESF and E1, the 4-bit ABCD CAS-codes received at a T1/E1 Port are stored and forwarded unmodified.
When the T1 SF format is used the S132 “extends” the T1-SF, 2-bit AB CAS-codes into a 4-bit CAS field since the
PW Sub-channel CAS Signaling requires a 4-bit field (regardless of whether it is T1-ESF, T1-SF or E1). Two
dummy bits are appended to and removed from the T1-SF, AB CAS-code to fill the packet’s 4-bit CAS field.
Most applications will use the same T1/E1 framing on both ends of the PW (e.g. T1-ESF to T1-ESF). For T1
applications, the S132 can be programmed to provide a translation between the 2-bit SF CAS Codes and 4-bit ESF
CAS Codes. This is a unidirectional function that can be enabled in the TXP direction (see
Translation Example”). When translating 4-bit, ESF, “ABCD” CAS into 2-bit, SF, “AB” CAS the “CD” bits are
discarded. When translating 2-bit, SF, “AB” CAS into 4-bit, ESF, “ABCD” CAS the S132 generates an ABCD code
by appending a programmed, 2-bit “CD” value to the received, 2-bit “AB” code (the “CD” insertion bits are
programmed using
Table 9-4
interpreted when using
“SCTXDFSE & PRCR1.MFS Format” column identifies each programmed translation function (e.g. ESF to SF). For
example, for “ESF to SF”,
programmed for SF;
The
1 - 24. The “TXP Packet Out” columns indicate how the CAS codes received from the
transmitted in the TXP Packets. The “RXP Packet In” column is identical to the “TXP Packet Out” column to
represent the process on the opposite end of the PW (as though the TXP Out is connected to the RXP In). The
TSIG
The “Format” settings determine whether CAS is sent once every 12 T1 frames or once every 24 T1 frames.
SCTXDFSE
specifies the
The protocols for the
the SF format only 2-bits of the 4-bit field are regarded as valid by the protocol. In the “RSIG” column, “XY” is used
to indicate that the values of the two “extra” bits are unknown. An external T1 SF Framer will ignore the last two
TSIG
show how the CAS codes are handled for all combinations.
Table 9-4. CAS Translation using RSIG and TSIG
SCTXDFSE to
PRCR1.MFS
Format
ESF to SF
SF to ESF
SF to SF
ESF to ESF A
E1 to E1
Notes: The “X” and “Y” values mean ”any value”, these values doesn’t matter since these bit positions are ignored.”
Table 9-5
T1-SF,
19-4750; Rev 1; 07/11
RSIG
column indicates how the CAS code (received from the RXP Packet) would be transmitted on the
dummy bits. The “SF to SF”, “ESF to ESF” and “E1 to E1” translation functions are included in the table to
TDAT
describes the same information for applications that use
column includes two sub-columns that provide an example of CAS data that might be received in frames
describes how to program each of the various translation functions and how the 4-bit fields are
specifies the
TSIG
Frm 1-12
A
A
A
A
and
1
1
1
1
1
TDM Port RSIG
B
B
B
B
B
1
1
1
1
1
RDAT
C
X
X
C
C
frame rate.
Pn.PRCR1.CBVSE
1
1
1
1
1
Pn.PTCR1.FFS
Y
Y
D
D
D
TXP Direction
RSIG
1
1
1
1
1
Frm 13-24
A
A
only exchange a 2-bit CAS field for each 12- frame, SF multi-frame.
RSIG
Pn.PRCR1.FFS
RSIG
2
2
B
B
and
2
2
X
X
2
2
Y
Y
TSIG
and TSIG. The table should be read from left to right. The “TXP Direction”,
frame rate.
2
2
Frm 1-24
A
A
A
A
A
and
1
1
1
1
1
pins always include a 4-bit field for the CAS Code (even for the SF format). In
TXP Packet Out
B
B
B
B
B
and Pn.PRCR1.DBVSE).
1
1
1
1
1
A
CD
A
C
C
Pn.PTCR1.MFS
1
2
1
1
and
B
B
D
D
PRCR1.MFS
1
2
1
1
Pn.PRCR1.MFS
are programmed for SF.
specifies the “TXP Packet Out” frame rate.
Frm 1-24
A
A
A
A
A
1
1
1
1
1
B
B
B
B
B
RXP Packet In
1
1
1
1
1
A
CD
A
C
C
are programmed for ESF;
1
2
1
1
B
B
D
D
RDAT
1
2
1
1
and
TDAT
RXP Direction
Frm 1-12
A
A
A
A
A
1
1
1
1
1
B
B
B
B
B
TDM Port TSIG
instead of
1
1
1
1
1
A
CD
A
C
C
1
1
1
1
B
B
D
D
DS34S132 DATA SHEET
1
1
1
1
B.BCDR1.SCTXDFSE
Figure
Frm 13-24
A
A
1
2
B
B
RSIG
RSIG
1
2
A
A
9-12, “ESF to SF
1
2
B
B
1
2
and TSIG. For
pin would be
PTCR1.MFS
PTCR1.MFS
Format
SF
ESF
SF
ESF
E1
TSIG
41 of 194
pin.
is