STANDARD PRODUCT
PM5365 TEMAP
DATASHEET
PMC-1991148
ISSUE 3
HIGH DENSITY VT/TU MAPPER
AND M13 MULTIPLEXER
SAV5
Input A3
System Add Bus Payload Indicator (SAV5). The add
bus payload indicator locates the position of the floating
payloads for each tributary within the SBI bus structure.
Timing differences between the tributary timing and the
synchronous SBI bus are indicated by adjustments of
this payload indicator relative to the fixed SBI bus
structure.
All timing adjustments indicated by this signal must be
accompanied by appropriate adjustments in the SAPL
signal.
The TEMAP only monitors the add bus payload
Indicator signal during the tributary timeslots assigned
to this device.
SAV5 is sampled on the rising edge of SREFCLK.
This signal shares a pin with signal ED[11].
SAJUST_REQ
Output D7
Tristate
System Add Bus Justification Request
(SAJUST_REQ). The justification request signals the
Link Layer device to speed up, slow down or maintain
the rate which it is sending data to the TEMAP. This is
only used when the TEMAP is the timing master for the
tributary transmit direction.
This active high signal indicates negative timing
adjustments when asserted high during the V3 or H3
octet of the tributary. In response to this the Link Layer
device sends an extra byte in the V3 or H3 octet of the
next SBI bus multi-frame.
Positive timing adjustments are requested by asserting
justification request high during the octet following the
V3 or H3 octet. The Link Layer device responds to this
request by not sending an octet during the V3 or H3
octet of the next multi-frame.
The TEMAP only drives the justification request signal
during the tributary timeslots assigned to this device.
SAJUST_REQ is updated on the rising edge of
SREFCLK.
Proprietary and Confidential to PMC-Sierra, Inc. and for its Customers’ Internal Use
47
PMC [ PMC-SIERRA, INC ]
