XRT83L38 Datasheet, PDF (17/91 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. 1.0.0
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
TQFP
PIN #
BGA
LEAD
#
TYPE
DESCRIPTION
173 A12
174 B11
175 C11
176 D11
177 A11
178 B10
179 A10
180 C10
173 A12
174 B11
175 C11
176 D11
177 A11
178 B10
179 A10
180 C10
Microprocessor Interface Address Bus Pins - Host mode:
I Microprocessor Interface Address Bus[7]
Microprocessor Interface Address Bus[6]
Microprocessor Interface Address Bus[5]
Microprocessor Interface Address Bus[4]
Microprocessor Interface Address Bus[3]
Microprocessor Interface Address Bus[2]
Microprocessor Interface Address Bus[1]
Microprocessor Interface Address Bus[0]
Loop-back Control Pins, Bits [1:0] Channel_[3:0]
In Hardware mode, pins 67-74 and 173-180 control which Loop-Back mode is
selected per channel. See “Loop-back Control Pins, Bits [1:0] Channel_[7:0]” on
page 17.
NOTE: These pins are internally pulled “Low” with a 50kΩ resistor.
94 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.
94 T13
Automatic Transmit “All Ones” - Hardware mode
This pin functions as an Automatic Transmit “All Ones”. See “Automatic Trans-
mit “All Ones” Pattern - Hardware Mode” on page 16.
127 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.
127 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