XRT86SH328 Datasheet, PDF (85/96 Pages) Exar Corporation – INTEGRATED 28-CHANNEL T1/E1 LIU/FRAMER, VT/TU MAPPER AND M13 MULTIPLEXER

XRT86SH328
Datasheet
XRT86SH328 PIN DESCRIPTIONS
Table 5 Low-Speed Side Interface - System-Side Signals- Pin Descriptions
Pin/Ball #
Pin Name
Type
Description
L29
TxDS1FRAME_6/
I/O Transmit DS1/E1 Serial Data Input Interface - Frame Alignment Input -
RxDS3NEG
Channel 6/Receive DS3 LIU Interface - Negative Polarity Input pin:
The function of this input pin depends upon which mode the XRT86SH328 has
been configured to operate in,.
A. If the XRT86SH328 has been configured to operate in the 28-Channel
Clear-Channel DS1/E1 Framer/LIU Mode - TxDS1FRAME_6:
See Pin H25 on page # 80 for pin description.
B. If the XRT86SH328 has been configured to transmit/receive data (on
the high-speed side of the chip) in the DS3 Mode - RxDS3NEG:
If the XRT86SH328 has been configured to operate in the M13 MUX Mode, then
the function of this input pin depends upon whether the Receive DS3 LIU
Interface block has been configured to operate in the Single-Rail or Dual-Rail
Mode.
B.1: If the Receive DS3 LIU Interface block has been configured to operate
in the Single-Rail Mode - NO FUNCTION:
Connect this pin to GND.
B.2 If the Receive DS3 LIU Interface block has been configured to operate
in the Dual-Rail Mode - RxDS3NEG:
If the Receive DS3 LIU Interface block (within the XRT86SH328) has been
configured to operate in the Dual-Rail Mode, then the XRT86SH328 will accept
the negative-polarity portion of the incoming DS3 data-stream via this input pin.
The Receive DS3 LIU Interface block will sample this incoming data upon the
user-selected edge of the RxDS3CLK Input clock signal (Ball N26).In this
configuration setting, the XRT86SH328 will accept the positive-polarity portion
of the incoming DS3 data-stream via the RxDS3POS input pin (Ball M28).
Note: Only use this particular input pin (for DS3 applications) if the STS-1 and
the DS3 Ports are configured to be separated. If the STS-1 and DS3
Ports are configured to be shared, then use the RxDS3NEG signal at Ball
U2.
N1
TxDS1FRAME_7
I Transmit DS1/E1 Serial Data Input Interface - Frame Alignment Input -
Channel 7/Egress Direction - T1/E1 Data Input - pin 1:
The function of this output pin is dependent upon which mode the XRT86SH328
has been configured to operate in.
If the XRT86SH328 has been configured to operate in the 28-Channel
Clear-Channel DS1/E1 Framer/LIU Mode - TxDS1FRAME_7:
See Pin H25 on page # 80 for pin description.
If the XRT86SH328 has been configured to operate in any other mode - NO
FUNCTION:
Tie this input pin to GND.
Datasheet
82
P1.0.1, September 1, 2005