XRT83SL38ES Exar, XRT83SL38ES Datasheet - Page 31

• Manufacturer Part Number: XRT83SL38ES
• Description: Peripheral Drivers & Components - PCIs 8 CHT1/E1LIUSH
• Manufacturer: Exar

Specifications of XRT83SL38ES

• Product Category: Peripheral Drivers & Components - PCIs
• Rohs: yes

REV. 1.0.2
TRANSMIT HDB3/B8ZS ENCODER
The Encoder function is available in both Hardware and Host modes on a per channel basis by controlling the
TNEG_n/CODES_n pin or CODES interface bit. The encoder is only available in single-rail mode. In E1 mode
and with HDB3 encoding selected, any sequence with four or more consecutive zeros in the input serial data
from TPOS_n/TDATA_n, will be removed and replaced with 000V or B00V, where “B” indicates a pulse
conforming with the bipolar rule and “V” representing a pulse violating the rule. An example of HDB3 Encoding
is shown in
removed and replaced using the B8ZS encoding rule. An example of Bipolar with 8 Zero Substitution (B8ZS)
encoding scheme is shown in
CODES_n pin to a “High” level selects the AMI coding for both E1 or T1 systems.
DRIVER FAILURE MONITOR (DMO)
F
IGURE
TPOS/TDATA
TNEG
9. T
or
TCLK
RANSMIT
Table
OCTAL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
HDB3 (case1)
HDB3 (case2)
3. In a T1 system, an input data sequence with eight or more consecutive zeros will be
Input
C
LOCK AND
T
SU
Table
AMI Output
AMI Output
C
C
B8ZS
B8ZS
Input
Input
I
ASE
ASE
NPUT
T
T
ABLE
N
4. Writing a “1” into the CODES_n interface bit or connecting the TNEG_n/
ABLE
1
2
UMBER OF PULSE BEFORE NEXT
D
ATA
T
3: E
4: E
HO
T
XAMPLES OF
XAMPLES OF
IMING
P
RECEDING
even
odd
29
+
+
-
-
P
HDB3 E
B8ZS E
ULSE
4
NCODING
NCODING
ZEROS
N
000VB0VB
000VB0VB
000+ -0- +
000- +0+ -
00000000
00000000
EXT
8 B
ITS
TCLK
N
EXT
B00V
000V
0000
R
4
BITS
XRT83SL38
TCLK
F