PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
9.7 General (5 signals)
Pin Name
Type Pin
Function
No.
RSTB
Input AA18
The Reset Bar (RSTB) is an active low signal that
provides an asynchronous S/UNI-IMA-8 reset.
RSTB is a Schmitt-triggered input with an internal
pull-up resistor.
OE
Input AB19
Input Y7
The Output Enable (OE) is an active high signal
that allows all of the outputs of the device to operate
in their functional state. When this signal is low, all
outputs of the S/UNI-IMA-8 go to the high
impedance state, with the exception of TDO.
SYSCLK
The System Clock (SYSCLK) signal is the master
clock for the S/UNI-IMA-8 device. The core S/UNI-
IMA-8 logic (including the SDRAM interface) is
timed to this signal.
External SDRAM devices share this clock and must
have clocks aligned within 0.2ns skew of the clock
seen by the S/UNI-IMA-8 device.
This clock must be stable prior to deasserting RSTB
0->1.
REFCLK
NC
Input N2
This clock is required and may operate at
frequencies up to 33 MHz. In general, for T1, and
E1 rate links, 20 MHz is sufficient. See 12.3.1.3 for
details on selecting the proper frequency.
M2 N1 No Connect. These balls are not connected to the
N3 P4
P1 L4
B2 A1
die.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
35
PMC [ PMC-SIERRA, INC ]
