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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
40
Pin Name
Type
Pin
No.
Function
C1FP
Input
AB3
Active High C1 Frame Pulse (C1FP).
This
signal is externally generated to indicate the first
C1 octet on the SBI BUS. If TWO_C1FP_EN is
low then the ADD and DROP busses are locked
together and this signal is common to both the
ADD and DROP sides of the SBI BUS. If
TWO_C1FP_EN is high, then this signal is the
DROP side C1FP.
This frame pulse indicator is a single REFCLK
signal long and is updated on the rising edge of
REFCLK. This signal is sampled on the rising
edge of REFCLK.
This signal also indicates multiframe alignment
which occurs every 4 frames, therefore this
signal is pulsed once every fourth C1 octet to
produce a 2KHz multiframe signal. The frame
pulse does not need to be repeated every
2KHz. The AAL1gator-32 will synchronize to this
signal and is also be able to flywheel in its
absence.
When any tributary on the SBI bus is in
synchronous mode the C1FP signal is used to
indicate T1 and E1 multiframe alignment and
must be pulsed on 48 SBI frame boundaries.
C1FP_ADD
Input
B4
C1 Frame Pulse for Add bus.
This pin can
optionally be used as the C1FP pulse for the
Add bus if the Add bus and Drop bus need to be
offset from each other. To use this pin the
TWO_C1FP_EN bit must be set in the
SBI_BUS_CFG_REG.
DDATA[7]
DDATA[6]
DDATA[5]
DDATA[4]
DDATA[3]
DDATA[2]
DDATA[1]
DDATA[0]
Input
D2
E3
F2
G3
J3
K4
L3
K1
Drop Bus Data (DDATA[7:0]).
The Drop data
bus is a time division multiplexed bus which
transports tributaries by assigning them to fixed
octets within the SBI BUS structure.
Multiple PHY devices can drive this bus at
uniquely assigned tributary columns within the
SBI BUS structure.
DDATA[7:0] is sampled on the rising edge of
REFCLK.