XRT84L38IB Exar Corporation, XRT84L38IB Datasheet - Page 362

• Manufacturer Part Number: XRT84L38IB
• Description: Network Controller & Processor ICs 8 Ch T1/E1 Framer
• Manufacturer: Exar Corporation

Specifications of XRT84L38IB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XRT84L38
OCTAL T1/E1/J1 FRAMER
the Received serial output data; Signaling Bit C coincides with Bit 1 of the Received serial output data and
Signaling Bit D coincides with Bit 0 of the Received serial output data.
The Receive Signaling Output Enable bit of the Receive Signaling Control Register (RSCR) determines
whether the extracted signaling bits will be sent through the Receive Signaling Output pin (RxSig_n) to external
equipments. The table below shows configurations of the Receive Signaling Output Enable bit of the Receive
Signaling Control Register.
RECEIVE SIGNALING CONTROL REGISTER (RSCR) (INDIRECT ADDRESS = 0XN2H, 0XA0H - 0XB7H)
10.5.1.3
As mentioned in the above sections, signaling information embedded in the incoming DS1 PCM data can be
sent to either the RSRA register array and/or sent through the Receive Signaling Output pin, at the same time,
the signaling data will be directed to the Receive Serial Data Output pin together with other incoming DS1
payload data. The external equipment can thus still extract signaling data from the received DS1 payload data
separately.
10.5.1.4
After channel conditioning, the signaling conditioning can be optionally enabled by the RSCR registers. The
actual signaling bits in each channel can be replaced either with all ones or with signaling bits stored in the
Receive Substitution Signaling Register (RSSR). To enable signaling substitution, the Receive Signaling
Substitution Enable bit of the Receive Signaling Control Register (RSCR) has to be set to one. The table below
shows configuration of the Receive Signaling Substitution Enable bit of the Receive Signaling Control Register.
RECEIVE SIGNALING CONTROL REGISTER (RSCR) (INDIRECT ADDRESS = 0XN2H, 0XA0H - 0XB7H)
F
IGURE
N
N
RxSerClk
UMBER
UMBER
B
B
5
6
IT
IT
RxSer
RxSig
116. T
Receive Signaling
Receive Signaling
Send Signaling Data through RxSer_n Pin
Signaling Data Substitution
Output Enable
IMING
Substitution
B
B
Enable
IT
IT
N
N
D
AME
AME
Timeslot 0
IAGRAM OF THE
A B
C
B
B
IT
IT
R/W
R/W
D
T
T
YPE
YPE
R
X
S
IG
0 - The XRT84L38 framer will not send extracted signaling bits from the
incoming DS1 payload data to external equipment through the Receive
Signaling Output pin (RxSig_n).
1 - The XRT84L38 framer will send extracted signaling bits from the incom-
ing DS1 payload data to external equipment through the Receive Signaling
Output pin (RxSig_n).
0 - Signaling Substitution is disabled. The XRT84L38 framer will not
replace extracted signaling bits from the incoming DS1 payload data with
all ones or with signaling bits stored in RSSR registers.
1 - Signaling Substitution is enabled. The XRT84L38 framer will replace
extracted signaling bits from the incoming DS1 payload data with all ones
or with signaling bits stored in RSSR registers.
_
N
O
Timeslot 5
UTPUT PIN
A B
342
C
D
Timeslot 6
Input Data
B
B
IT
IT
A B
D
D
ESCRIPTION
ESCRIPTION
C
D
Timeslot 16
Input Data
A B
REV. 1.0.1
C
D