
XRT86SH328
PRELIMINARY
294
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
REV. P1.0.6
Whenever it ceases to detect the "Receive Loop-Back Activation" Pattern (associated with "Code 2") within the
incoming DS1 data-stream.
`
0 = Disables the "Change of Receive Loop-Back Activation State" Interrupt for loop-code "Code 2".
`
1 = Enables the "Change of Receive Loop-Back Activation State" Interrupt for loop-code "Code 2".
Bit 0 - Change of Receive Loop-Back Deactivation Interrupt Enable - Code 2:
This READ/WRITE bit-field permits the user to either enable or disable the "Change of Receive Loop-Back Deactivation
State" Interrupt. If the user enables the "Change of Receive Loop-Back Deactivation State" Interrupt, then the Receive
DS1 Framer block will generate the "Change of Receive Loop-Back Deactivation State" Interrupt in response to the
following events.
Whenever it detects and validates the "Receive Loop-Back Deactivation" Pattern (associated with "Code 2") within
the incoming DS1 data-stream, and
Whenever it ceases to detect the "Receive Loop-Back Deactivation" Pattern (associated with "Code 2") within the
incoming DS1 data-stream.
`
0 = Disables the "Change of Receive Loop-Back Deactivation State" Interrupt for "Code 2".
`
1 = Enables the "Change of Receive Loop-Back Deactivation State" Interrupt for "Code 2".
2.14
DS1/E1 FRAMER BLOCK REGISTERS - E1 APPLICATIONS
BIT7 - Reserved
BIT6 - Set T1 Mode:
This READ/WRITE bit-field is used to configure the Channel to operate in either the T1 or E1 Mode.
`
0 = Configures the Framer Channel to operate in the E1 Mode
`
1 = Configures the Framer Channel to operate in the T1 Mode
BIT 5 - Force all Channels to Sync to 8kHz:
This READ/WRITE bit-field is used to configure all active (either 21 or 42) Transmit E1 Framer blocks to synchronize
their transmit output frame alignment with the 8kHz signal that is derived from the MCLK PLL.
`
0 = Does not configure each of the Transmit E1 Framer blocks to synchronize their transmit output frame alignment
with the 8kHz signal (from the MCLK PLL).
`
1 = Configures each of the Transmit E1 Framer blocks to synchronize their transmit output frame alignment with the
8kHz signal (from the MCLK PLL).
N
OTE
:
This feature should only be used if the XRT86SH328 has been configured to operate in the 21-Channel E1
Framer/LIU Combo Mode. The user MUST NOT use this feature if the XRT86SH328 has been configured to
operate in any of the Aggregation Modes.
BIT [4:2] - Reserved
BIT [1:0] - Clock Source Select[1:0]:
These two READ/WRITE bit-fields is used to specify the timing source for the Ingress and Direction Transmit E1 Framer
block, within this particular channel.
T
ABLE
432: E1 F
RAMER
B
LOCK
- C
LOCK
S
ELECT
R
EGISTER
(A
DDRESS
= 0
X
N100,
WHERE
N
RANGES
IN
VALUE
FROM
0
X
01
TO
0
X
38)
BIT7
BIT6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Unused
Set E1 Mode
Force all
Channels to
Sync to 8kHz
Unused
Clock Source Select[1:0]
R/O
R/W
R/W
R/O
R/O
R/O
R/W
R/W
0
0
0
0
0
0
0
1