
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
PM7340 S/UNI-IMA-8
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
35
9.7 General (5 signals)
Pin Name
Type
Pin
No.
Function
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
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
Input
Y7
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
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.
NC
M2 N1
N3 P4
P1 L4
B2 A1
No Connect.
These balls are not connected to the
die.