PM5366-PI PMC-Sierra, Inc., PM5366-PI Datasheet - Page 51

• Manufacturer Part Number: PM5366-PI
• Description: HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER AND M13 MULTIPLEXER
• Manufacturer: PMC-Sierra, Inc.

PRELIMINARY
DATASHEET
PMC-2010672
Pin Name
LAOE/LATPL
PROPRIETARY AND CONFIDENTIAL
Type
Output AB11 The LATPLSEL bit of the SONET/SDH Master Egress
ISSUE 1
Pin
No.
Function
VTPP Configuration register determines the function of
this output. When LATPLSEL is logic 1, the signal is
LATPL. When LATPLSEL is logic 0, the signal is
LAOE.
Line Add Bus Output Enable (LAOE). The Add Bus
output enable signal is asserted high whenever the
Line Add Bus is being driven which is co-coincident
with the Line Add bus outputs coming out of tri-state.
This pin is intended to control an external multiplexer
when multiple TEMAP-84s are driving the Telecom Add
bus during their individual tributaries. This same
function is accomplished with the Add bus tristate
drivers but increased tolerance to tributary
configuration problems is possible with an external
mux. This output is controlled via the LAOE bit in the
TTMP Tributary Control registers when the egress
VTPP is bypassed. When the the egress VTPP is not
bypassed or a TU-3 is being mapped, LAOE is high.
Line Add Bus Tributary Payload Active (LDATPL).
The tributary payload active signal marks the bytes
carrying the tributary payload. LATPL is high during
each tributary payload byte on the LADATA[7:0] bus.
LATPL will be low during transport overhead, path
overhead, V1 bytes and V2 bytes. To indicate pointer
adjustments, LATPL will be asserted appropriately
during the V3 byte and following byte for the tributary.
LAOE/LATPL is updated on the rising edge of
LREFCLK.
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HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER
AND M13 MULTIPLEXER
PM5366 TEMAP-84