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RELEASED
PM73122 AAL1GATOR-32
DATASHEET
PMC-1981419
ISSUE 7
32 LINK CES/DBCES AAL1 SAR PROCESSOR
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
44
Pin Name
Type
Pin
No.
Function
AJUST_REQ
Input
W1
Active High Add Bus Justification Request
(AJUST_REQ).
This signal is used to speed up
or slow down the AAL1gator-32 which is
sending data to the PHY. This signal is only
used when the PHY layer device is the timing
master for the transmit direction.
This active high signal indicates negative timing
adjustments when asserted high during the V3
or H3 octet, depending on the tributary type. In
response to this the AAL1gator-32 will send an
extra byte in the V3 or H3 octet of the next
frame.
This signal indicates positive timing adjustments
when asserted high during the octet following
the V3 or H3 octet, depending on the tributary
type. The AAL1gator-32 will respond to this by
not sending an octet during the V3 or H3 octet
of the next frame.
All timing adjustments from the AAL1gator-32 in
response to the justification request will still set
the payload and payload indicators
appropriately for timing adjustments.
In synchronous T1 and E1 modes this signal is
unused and must be held low.
AJUST_REQ is sampled on the rising edge of
REFCLK.
AACTIVE
Output
AC3
Add Bus Active Indicator (AACTIVE).
This
active high signal is asserted high during all
octets when driving data and control signals,
ADATA[7:0], ADP, APL and AV5, onto the bus.
All other SBI Link Layer devices (e.g. other
AAL1gator-32 on the common SBI bus) driving
the bus listen to this signal to detect multiple
sources driving the bus which can occur due to
configuration problems
AACTIVE is asserted on the rising edge of
REFCLK.
Maximum output current (IMAX) = 8 mA