XRT83L38_07 Datasheet, PDF (16/87 Pages) Exar Corporation – OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR

XRT83L38
OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
REV. 1.0.2
SIGNAL NAME
A[7]
A[6]
A[5]
A[4]
A[3]
A[2]
A[1]
A[0]
LOOP1_3
LOOP0_3
LOOP1_2
LOOP0_2
LOOP1_1
LOOP0_1
LOOP1_0
LOOP0_0
µPCLK
ATAOS
INT
TRATIO
LEAD # TYPE
DESCRIPTION
Microprocessor Interface Address Bus Pins - Host mode:
A12
I Microprocessor Interface Address Bus[7]
B11
Microprocessor Interface Address Bus[6]
C11
Microprocessor Interface Address Bus[5]
D11
Microprocessor Interface Address Bus[4]
A11
Microprocessor Interface Address Bus[3]
B10
Microprocessor Interface Address Bus[2]
A10
Microprocessor Interface Address Bus[1]
C10
Microprocessor Interface Address Bus[0]
Loop-back Control Pins, Bits [1:0] Channel_[3:0]
A12
In Hardware mode, pins 67-74 and 173-180 control which Loop-Back mode is
B11
selected per channel. SEE”LOOP-BACK CONTROL PINS, BITS [1:0]
C11
CHANNEL_[7:0]” ON PAGE 17.
D11
NOTE: These pins are internally pulled “Low” with a 50kΩ resistor.
A11
B10
A10
C10
T13
I Microprocessor Clock Input - Host Mode:
Input clock for synchronous microprocessor operation. Maximum clock rate is 54
MHz.
NOTE: This pin is internally pulled “Low” with a 50kΩ resistor for asynchronous
microprocessor interface when no clock is present.
T13
Automatic Transmit “All Ones” - Hardware mode
This pin functions as an Automatic Transmit “All Ones”. SEE”AUTOMATIC
TRANSMIT “ALL ONES” PATTERN - HARDWARE MODE” ON PAGE 16.
L16
O Interrupt Output - Host mode
This pin goes “Low” to indicate an alarm condition has occurred within the device.
Interrupt generation can be globally disabled by setting the GIE bit to a “0” in the
command control register.
L16
I ^{Transmitter Transformer Ratio Select - Hardware mode}
The function of this pin is to select the transmitter transformer ratio. SEE”TRANS-
MITTER TRANSFORMER RATIO SELECT - HARDWARE MODE” ON
PAGE 16.
NOTE: This pin is an open drain output and requires an external 10kΩ pull-up
resistor.
13