XRT75L02 Datasheet, PDF (42/50 Pages) Exar Corporation – TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER

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REV. 1.0.3
XRT75L02
TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER
TABLE 19: REGISTER MAP DESCRIPTION - CHANNEL 0
ADDRESS
(HEX)
REGISTER
TYPE
BIT#
NAME
D0
SYMBOL
DESCRIPTION
DEFAULT
VALUE
SR/DR_n Setting this bit configures the Receiver and Trans-
0
mitter in Single-Rail (NRZ) mode.
NOTE: See section 4.0 for detailed description.
D1 STS-1/ Setting this bit configures the channel into STS-1
0
DS3_n mode.
NOTE: This bit field is ignored if the channel is
configured to operate in E3 mode.
D2
E3_n Setting this bit configures the channel in E3 mode.
0
D3
LLB_n Setting this bit configures the channel in Local Loop-
0
back mode.
D4
RLB_n Setting this bit configures the channel in Remote
0
Loopback mode.
0x06 (Ch 0) R/W Block Con-
0x0E (Ch 1)
trol
RLB_n
LLB_n
Loopback Mode
0
0
Normal Operation
0
1
Analog Local
1
0
Remote
1
1
Digital
D5 PRBSEN_ Setting this bit enables the PRBS generator/detec-
0
n
tor. PRBS generator generate and detect either 2¹⁵-
1 (DS3 or STS-1) or 2²³-1 (for E3).
The pattern generated and detected are unframed
pattern.
D7-D6
Reserved
40