xrt94l33 Exar Corporation, xrt94l33 Datasheet - Page 72

• Manufacturer Part Number: xrt94l33
• Description: Multi-channel, Multi-function Device Aggregates 3 Ds3/e3/sts-1 Into Oc3/stm-1
• Manufacturer: Exar Corporation

XRT94L33
Rev.1.2.0.
AD13
AB27
AA26
E15
D22
Y26
V24
V25
RxOHFRAME_0
RxOHFRAME_1
RxOHFRAME_2
RxUPRTY/
RxMOD_0
RxPPRTY
RxPDVAL
RxPERR
RxPEOP
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
O
O
O
O
O
O
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
Receive Overhead Data Interface – Framing Pulse
indicator
This output pin functions as the “Receive Overhead Clock”
output for the receive system side interface when the
XRT94L33 is configured to operate in DS3/E3 mode, however,
it functions as the “Receive STS-1 Overhead Clock” output
when the device is configured to operate in the STS-1 mode.
When configured to operate in DS3/E3 mode:
This output pin pulses “high” whenever the Receive Overhead
Data Output Interface block outputs the first overhead bit of a
new DS3 or E3 frame.
When configured to operate in STS-1 mode:
These output pins, along with “RxOH_n”, “RxOHEnable_n”
and “RxOHClk_n” function as the “Receive STS-1 TOH and
POH Output Port”.
These output pins will pulse “high” coincident with either of the
following events.
When the very first TOH byte (A1), of a given STS-1 frame, is
being output via the corresponding “RxOH_n” output pin.
When the very first POH byte (J1), of a given STS-1 frame, is
being output via the corresponding “RxOH_n” output pin.
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 “RxOHEnable_n” output pin.
For mapper applications, Please let this pin “float”.
For mapper applications, Please let this pin “float”.
For mapper applications, Please let this pin “float”.
For mapper applications, Please let this pin “float”.
For mapper applications, Please let this pin “float”.
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