XRT94L43_06 Datasheet, PDF (89/328 Pages) Exar Corporation – SONET/SDH OC-12 TO 12XDS3/E3 MAPPER

XRT94L43
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
RXSTS-1 TOH/POH INTERFACE
REV. 1.0.2
PIN #
SIGNAL NAME
SIGNAL
I/O
TYPE
DESCRIPTION
F12
F22
T24
AE20
A18
H21
AB24
AE16
E18
K26
AA23
AF10
RxSTS1OHClk_0
RxSTS1OHClk_1
RxSTS1OHClk_2
RxSTS1OHClk_3
RxSTS1OHClk_4
RxSTS1OHClk_5
RxSTS1OHClk_6
RxSTS1OHClk_7
RxSTS1OHClk_8
RxSTS1OHClk_9
RxSTS1OHClk_10
RxSTS1OHClk_11
O CMOS Receive STS-1 TOH and POH Output Port - Clock Output signal:
These output pins, along with RxSTS1OH_n, RxSTS1OHFrame_n,
and RxSTS1OHSel_n function as the Receive STS-1 TOH and POH
Output Port.
These output pins function as the Clock Output signals for the
Receive STS-1 TOH and POH Output Port. The RxSTS1OH_n,
RxSTS1Frame_n and RxSTS1OHSel_n output pins are updated
upon the falling edge of this clock signal.
D12 RxSTS1OHFrame_0 O
E22 RxSTS1OHFrame_1
U26 RxSTS1OHFrame_2
AF18 RxSTS1OHFrame_3
B17 RxSTS1OHFrame_4
J22 RxSTS1OHFrame_5
W22 RxSTS1OHFrame_6
AF12 RxSTS1OHFrame_7
F19 RxSTS1OHFrame_8
K24 RxSTS1OHFrame_9
AF23
AD10
RxSTS1OHFrame_1
0
RxSTS1OHFrame_11
CMOS
Receive STS-1 TOH and POH Output Port - Frame Boundary
Indicator:
These output pins, along with RxSTS1OH_n, RxSTS1OHSel_n and
RxSTS1OHClk_n function as the Receive STS-1 TOH and POH
Output Port.
These output pins will pulse "High" coincident with either of the fol-
lowing events.
1. When the very first TOH byte (A1), of a given STS-1 frame, is
being output via the corresponding RxSTS1OH_n output pin.
2. When the very first POH byte (J1), of a given STS-1 frame, is
being output via the corresponding RxSTS1OH_n output pin.
NOTE:
The external circuitry can determine whether these output
pins are pulsing "High" for the first TOH or POH byte by
checking the state of the corresponding RxSTS1OHSel_n
output pin.
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