XRT83SH38ES View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT83SH38ES' PDF : 78 Pages View PDF
XRT83SH38
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.7
TABLE 22: MICROPROCESSOR REGISTER 0X00H BIT DESCRIPTION
CHANNEL 0-7 (0X00H-0X70H)
BIT
NAME
FUNCTION
Register
Type
Default
Value
(HW reset)
D7
QRSS/ QRSS/PRBS Select Bits
PRBS These bits are used to select between QRSS and PRBS.
1 = QRSS
0 = PRBS
R/W
0
D6
PRBS_Rx/ PRBS Receive/Transmit Select:
R/W
0
Tx
This bit is used to select where the output of the PRBS Generator
is directed if PRBS generation is enabled.
0 = Normal Operation - PRBS generator is output on TTIP and
TRING if PRBS generation is enabled.
1 = PRBS Generator is output on RPOS; RNEG is internally
grounded, if PRBS generation is enabled.
Bit 6 = "0"
+
TTIP
PBRS
-
Tx
Generator
TRING
Bit 6 = "1"
+
PBRS
-
Rx
Generator
RPOS
RNEG
NOTE: If PRBS generation is disabled, user should set this bit to ’0’
for normal operation.
D5
RxON Receiver ON/OFF
R/W
0
Upon power up, the receiver is powered OFF. RxON is used to
turn the receiver ON or OFF if the hardware pin RxON is pulled
"High". If the hardware pin is pulled "Low", all receivers are turned
off.
0 = Receiver is Powered Off
1 = Receiver is Powered On
D4
EQC4 Equalizer Control Bits
D3
EQC3 The equalizer control bits are shown in Table 23 below.
D2
EQC2
D1
EQC1
D0
EQC0
R/W
0
0
0
0
0
53
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