xrt83l30 Exar Corporation, xrt83l30 Datasheet - Page 16

• Manufacturer Part Number: xrt83l30
• Description: Xrt83l30 -single-channel T1/e1/j1 Long-haul, Short-haul Line Interface Unit
• Manufacturer: Exar Corporation

CONTROL FUNCTION
XRT83L30
SINGLE-CHANNEL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
LOOP1
LOOP0
RESET
SR/DR
EQC4
EQC3
EQC2
SCLK
SDO
SDI
41
28
29
30
21
22
23
O
I
I
I
I
I
I
Hardware Reset (Active "Low")
When this pin is tied “Low” for more than 10µs, the device is put in the reset
state.
Pulling RESET “Low” while the ICT pin is also “Low” will put the chip in fac-
tory test mode. This condition should never happen during normal operation.
N
Single-Rail/Dual-Rail Data Format
In Hardware mode, connect this pin "Low" to select transmit and receive
data format in dual-rail mode. In this mode, HDB3 or B8ZS encoder and
decoder are not available.
Connect this pin "High" to select single-rail data format.
N
Loop-back Control pin 1
Loop-back Control pin 0
In Hardware mode, LOOP[1:0] pins are used to control the Loop-back func-
tions according to the following table:
N
Equalizer Control Input pin 4
In Hardware mode, this pin together with EQC[3:0] are used for controlling
the transmit pulse shaping, transmit line build-out (LBO), receive monitoring
and also to select T1, E1 or J1 modes of operation. See
tion of Transmit Equalizer Control bits.
Serial Data Input
Host mode,
Equalizer Control Input pin 3
See EQC4/SDI description for further explanation for the usage of this pin.
Serial Data Output
Host mode,
Equalizer Control Input pin 2
See EQC4/SDI description for further explanation for the usage of this pin.
Serial Interface Clock Input
Host mode,
OTE
OTE
OTE
: Internally pulled “High” with a 50kΩ resistor.
: Internally pulled "Low" with a 50kΩ resistor.
: Internally pulled "Low" with a 50kΩ resistor.
SEE”SERIAL INTERFACE” ON PAGE 5.
SEE”SERIAL INTERFACE” ON PAGE 5.
SEE”SERIAL INTERFACE” ON PAGE 5.
13
LOOP1
0
0
1
1
LOOP0
0
1
0
1
Normal Mode
Local Loop-Back
Remote Loop-Bac
Digital Loop-Back
MODE
Table 5
for descrip-
REV. 1.0.1