Features
S4802 Block Diagram
MISSOURI
PRELIMINARY SUMMARY DATASHEET
SONET/SDH STS-48/STM-16 Framer/Pointer Processor
Part Number - S4802
Revision 2.7 - May 2000
AMCC
Preliminary Information - The information contained in this
document is about a product in its sample release phase and
is subject to change without notice at any time. All features
described herein are design goals. Contact AMCC for updates
to this document and the latest product status.
Features
SONET/SDH Mux/Demux,Transport Overhead Terminating
Transceiver, & Pointer Processors for STS-48/STM-16 and up
to 4 x STS-12/STM-4 or 16 x STS-3/STM-1s.
Serial STS-12/STM-4 and STS-3/STM-1 interfaces.
Provisionable as SONET or SDH on a per line basis.
Packaged in a 624-pin CBGA.
Multiplex Direction:
Multiplexes 4 x (STS-12/STM-4 or 4 STS-3/STM-1) tributaries
into an STS-48/STM-16 or bypass for
STS-48/STM-16-to-STS-48/STM-16 connection.
Pointer Processors for all valid input combinations of
STS-48c/AU-4-16c, STS-12c/AU-4-4c, STS-3c/AU4, or
STS-1/AU-3 signals.
Configurable selector for choosing low-speed interface,
high-speed interface, or Protection inputs.
Built In 48x48 cross-connect for STS-1 level cross-connection
or add/drop.
4 x (STS-12/STM-4 or 4 STS-3/STM-1) or STS-48/STM-16
framers.
TOH (Regenerator/Multiplex Sections) Monitors with provision-
able B2 signal Fail and Degrade detection algorithms.
Provisionable TOH Generator for STS-48/STM-16 output.
STS-48/STM-16 frame synchronous scrambler.
Demultiplex Direction:
Demultiplexes 4 x (STS-12/STM-4 or 4 STS-3/STM-1) tributar-
ies from an STS-48/STM-16 or bypass for
STS-48/STM-16-to-STS-48/STM-16 connection.
Pointer Processor for all valid input combinations of
STS-48c/AU-4-16c, STS-12c/AU-4-4c, STS-3c/AU4, or
STS-1/AU-3 signals.
Configurable selector for choosing demultiplexed tributaries
from high-speed interface, low-speed interface, or from Protec-
tion inputs.
Built-in 48x48 cross-connect for STS-1 level cross-connection
or add/drop.
STS-48/STM-16 Framer.
STS-48/STM-16 TOH (Regenerator and Multiplex sections)
Monitor.
Provisionable TOH (Regenerator/Multiplex Sections) Genera-
tors for STS-12/STM-4 and/or STS-3/STM-1 outputs.
STS-12/STM-4 and/or STS-3/STM-1 frame synchronous
scramblers.
Applications:
ATM and POS (Packet over SONET) switches and routers.
SONET/SDH add/drop multiplexers, terminal multiplexers,
and digital cross connects.
WDM/DWDM Mux/Demux applications.
MX_DATA_OUT_[15:0]
DX_CLK_IN
FRAM48
FRGN48
MX_CLK_OUT
DX_DATA_IN_[15:0]
TOHDROP
TOH
INSERT
TOH
INSERT
TOH
DX_CLK_OUT_[1:2]
High Speed
Interface
Low Speed
Interface
Demux
Direction
Mux
Direction
D
_
[1
5:0]
ADDR_
[1
2
:
0
]
CSN
RDB(
D
SB)
WRB
(
RWB)
RD
YB(
DT
ACK
B
)
BUSM
O
D
E
INT
B
MICROPROCESSOR I/F
RST
B
APS
_
I
N
T
B
UPCL
K
4xFR
12
/3 +
12xF
R
3
TX
F
R
AMG
E
N
4xFR
12
/3+
12xF
R
3
RX F
R
M
R
S
POINTER
PROC.
DROP
(STS-48,
16 STS-3)
DX_FRAME_IN
DEMUX
TOH
INSERT
MX
_T
OH_
D
A
T
A
_
OUT
_
[1:16]
MX
_T
OH_S
Y
NC_OUT
_
[1:1
6]
M
X
_
T
OH
_C
LK
_OU
T
_[1:1
6
]
D
X
_T
OH
_C
L
K
_I
N
S
DX
_T
O
H
_
D
A
T
A
_
INS
_
[1:1
6]
DX_
T
OH_
SYNC_
INS
SE
L
S
Y
S
_C
LK
_I
N
D
X
_T
OH
_C
LK
_OU
T
DX
_
T
OH_DA
T
A
_
OUT
DX_
T
OH_
S
Y
NC_
OUT
MX
_T
O
H
_
D
A
T
A
_
IN
S
M
X
_T
OH
_S
Y
N
C
_
I
N
S
MX
_T
OH
_C
L
K
_I
N
S
POINTER
PROC.
(STS-48)
MX
_P
R
O
T_
D
A
T
A
_OU
T
_
[
1:16]
MX
_P
R
O
T_
D
A
T
A
_IN
_
[1
:16]
DX_
P
ROT
_
DA
T
A
_
I
N_
[1
:1
`6
]
D
X
_P
R
O
T_D
A
T
A
_OU
T
_[
1:16]
SY
S_
SY
NC_
I
N
16
16
16
16
DX_
P
ROT
_
SYNC_
OUT
DX_
P
ROT
_
CL
K
_
O
U
T
DX_
P
ROT
_
S
Y
NC_
IN
DX_
P
ROT
_
CL
K
_
I
N
M
X
_
P
RO
T
_
SYNC
_
O
U
T
MX
_P
R
O
T_
C
L
K
_
OU
T
M
X
_
P
ROT
_
SYN
C_
IN
M
X
_
P
ROT
_
CL
K_
IN
D
X
_LOS
E
X
T
D
X
_A
LA
R
M
_OU
T
DX_DATA_OUT_[1:16]
MX_DATA_IN_[1:16]
MX_CLK_IN_[1:16]
MX
_A
L
A
R
M
_OU
T
_
[
1:16]
MX
_LOS
E
X
T
_
[1:1
6]
G
P
IO_
[15:0]
TC
K
TD
O
TM
S
TR
S
T
B
TD
I
TS
_E
N
16
D
X
_P
R
O
T_P
R
TY
_I
N
DX
_
P
ROT
_
P
R
T
Y
_
O
UT
MX
_P
R
O
T_P
R
TY
_O
U
T
MX
_P
R
O
T_P
R
TY
_I
N
SY
NCM
O
D
E
S
YS_
S
Y
NC_
O
U
T
SE
L
or 1
x FR
48
o
r
1 x
FR
48
R
X
_
R
E
F
_C
LK
_O
U
T
P/
S
S/
P
4 x STS-12,
AMCC
200 Brickstone Square, Andover, MA 01810 Ph: 978/623-0009 Fax:978/623-0024
S4802 SONET/SDH STS-48/STM-16 Framer/Pointer Processor
Revision 2.7 - May 2000
PRELIMINARY SUMMARY DATASHEET
Overview and Applications
SONET Processing
The S4802 can be used in either SONET or SDH applica-
tions. On the low-speed side, it can interface to 4 groups of
either 1 STS-12/STM-4 or 4 STS-3/STM-1 signals in each
direction.
In the demultiplex direction, the S4802 accepts a 16-bit wide
STS-48/STM-16 signal. This input may have originated from
deserializing an STS-48/STM-16 signal. The S4802 locates
frame in this signal, performs descrambling, processes the
TOH bytes, and performs pointer processing. If this signal
doesn't contain a STS-48c/AU-4-16c payload, S4802 demul-
tiplexes the signal to 4 groups of either 1 STS-12/STM-4 or 4
STS-3/STM-1 tributaries. Either these demuxed tributaries
(before or after they are pointer-processed), or tributaries
from the low-speed mux inputs are then selected. The
selected tributaries then process in the demux direction from
generators that generate the TOH bytes (or SOH bytes in
SDH mode), perform scrambling, and output the data up to
16 serial interfaces.
In the multiplex direction, the S4802 accepts 4 serial
STS-12/STM-4 (622 Mb/s) signals or 4 groups of 4 serial
(155 Mb/s) STS-3/STM-1 signals. The S4802 locates the
STS-12/STM-4 or STS-3/STM-1 frames, descrambles the
data, and processes the TOH bytes (or SOH bytes in SDH
mode). The S4802 then selects some combination of these
signals or tributaries from the demux direction by using
high-speed interfaces for pointer processing. The pointer pro-
cessor output may then be muxed into an STS-48. This
muxed signal, or the STS-48 from the demux input, or the
STS-48c/AU-4-16c from the pointer processor is then
selected as the input to the FRGEN48.
The S4802 then generates the TOH bytes (or SOH bytes in
SDH mode), performs frame synchronous scrambling, and
outputs the data on a 16-bit bus.
Low-Speed Interface
On the low-speed side, in both the mux and demux direc-
tions, the S4802 supports either 4-serial STS-12/STM-4 sig-
nals operating at 622 Mb/s or 4 groups of 4 serial
STS-3/STM-1 signals operating at 155 Mb/s. S4802 is
designed to bolt directly to fiber optic transcievers with built-in
clock data recovery. (See figure below.)
High-Speed Interface
On the high-speed side, S4802 supports 16-bit parallel
high-speed interfaces, operating at 155 MHz, on both the
multiplex and demultiplex side.
Controller Interface
A high-speed microprocessor interface is provided for config-
uration and monitoring. S4802 provides numerous automatic
monitoring functions. It can be configured to provide an inter-
rupt to the control system, or it can be operated in a polled
mode.
Microprocessor
Control
Control
Addr
Data
16
13
Typical Application: S4802 in 2.488 Gb/s SONET/SDH Add/Drop Multiplexer Application
AMCC
S4802
MX_DATA_OUT_[15:0]
DX_CLK_IN
DX_DATA_IN_[15:0]
P/S & S/P
SONET XCVR
with
Clk Rcvry
SerRxD
SerTxD
Fiber Optic
XCVR
OC-48
FO Signal
Fiber Optic
XCVR
OC-12
FO Signal
RxD
SerTxD
MX_CLK_OUT
AMCC
AMCC
S3024
CRU
SerRxCLK
Fiber Optic
XCVR
OC-12
FO Signal
RxD
SerTxD
AMCC
S3024
CRU
SerRxCLK
Fiber Optic
XCVR
OC-12
FO Signal
RxD
SerTxD
AMCC
S3024
CRU
SerRxCLK
Fiber Optic
XCVR
OC-12
FO Signal
RxD
SerTxD
AMCC
S3024
CRU
SerRxCLK
S3063/3064
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