XRT72L50 Datasheet, PDF (32/471 Pages) Exar Corporation – SINGLE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

XRT72L50
SINGLE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
REV. 1.2.1
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PIN DESCRIPTION
PIN #
98
PIN NAME
RxOH/
RxHDLCDat6
99
RxOHEnable/
RxHDLCDat5
100
RxOHFrame/
RxHDLCDat4
TYPE
O
O
O
DESCRIPTION
Receive Overhead Output Port:
All overhead bits, which are received via the Receive Section of the Framer
IC; will be output via this output pin, upon the rising edge of RxOHClk.
Receive HDLC Data Output - 6:
This pin contains bit 6 RxHDLC data when the HDLC controller is on.
Receive Overhead Enable Indicator:
The XRT72L50 will assert this output signal for one RxOutClk period when it
is safe for the Terminal Equipment to sample the data on the RxOH output
pin.
Receive HDLC Data Output - 5:
This pin contains bit 5 RxHDLC data when the HDLC controller is on.
Receive Overhead Frame Boundary Indicator:
This output pin pulses "High" whenever the Receive Overhead Data Output
Interface” block outputs the first overhead bit (or nibble) of a new DS3 or E3
frame.
Receive HDLC Data Output - 4:
This pin contains bit 4 RxHDLC data when the HDLC controller is on.
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