
XRT86SH328
PRELIMINARY
178
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
REV. P1.0.6
N
OTE
:
These functional blocks are only active if the XRT86SH328 has been configured to operate in either the M13 MUX
or in the M13 MUX, which is Asynchronously Mapped into STS-1/STS-3 Mode.
BIT7 - DS3 Framer Local Loop-back Mode:
This READ/WRITE bit-field is used to configure the DS3/E3 Framer block to operate in the DS3 Framer block to operate
in the DS3 Framer Local Loop-back Mode. If the DS3 Framer block has been configured to operate in the Framer Local
Loop-back Mode, then the output of the Transmit DS3 Framer block will be internally looped-back into the Receive DS3
Framer block.
`
0 - Configures the DS3/E3 Framer block to operate in the Normal Operation (e.g., Non-DS3 Framer Local Loop-back)
mode
`
1 - Configures the DS3/E3 Framer block to operate in the DS3 Framer Local Loop-back Mode.
F
IGURE
10. I
LLUSTRATION
OF
THE
F
UNCTIONAL
B
LOCK
D
IAGRAM
OF
THE
XRT86SH328,
WITH
THE
F
UNCTIONAL
B
LOCKS
(
WHICH
ARE
CONTROLLED
/
MONITORED
VIA
THE
DS3 F
RAMER
AND
M13 MUX B
LOCK
REGISTERS
)
HIGH
-
LIGHTED
.
T
ABLE
238: DS3 F
RAMER
B
LOCK
O
PERATING
M
ODE
R
EGISTER
(A
DDRESS
= 0
X
0E00)
BIT7
BIT6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
DS3 Framer
Local Loop-
Back
Set DS3
Mode
Internal LOS
Enable
DS3 Framer
Block Soft-
ware RESET
Reserved
Frame
Format
TimRefSel[1:0]
R/W
R/W
R/W
R/W
R/O
R/W
R/W
R/W
0
1
1
0
0
0
1
1
STS-1/
STS-3
Telecom
Bus
Interface
Transmit
STS-1/3
TOH
Processor
Block
Receive
STS-1/3
TOH
Processor
Block
Transmit
STS-1 POH
Processor
Block
Receive
STS-1 POH
Processor
Block
VT/TU
De-Mapper
Block
Receive
DS3
Framer
Block
Transmit
DS3
Framer
Block
M23
MUX
Block
M23
De-MUX
Block
Ingress
Direction
Receive
DS1/E1
Framer
Block
Egress
Direction
Receive
DS1/E1
Framer
Block
Ingress
Direction
Transmit
DS1/E1
Framer
Block
Egress
Direction
Transmit
DS1/E1
Framer
Block
Receive
DS1/E1
LIU
Block
Transmit
DS1/E1
LIU
Block
DS3/
STS-1
LIU
Interface
M12
MUX
Block
M12
De-MUX
Block
DS1/E1
Jitter
Atten
Block
DS1/E1 Channel 0
DS1/E1 Channel 0
DS2 Channel 0
From DS1/E1 Channels 1 - 27
From DS2 Channels 1 - 6
To DS2 Channels 1 - 6
From DS1/E1 Channels 1 - 3
To DS1/E1 Channels 1 - 3
To DS1/E1
Channels 1 - 27
VT/TU
Mapper
Block
DS2 Channel 0