is high and the internal device registers will hold their previous values.
There are three chip enable pins (CE
1
, CE
2
,
CE
2
) that allow the
user to deselect the device when desired. If any one of these three
is not asserted when ADV/LD is low, no new memory operation can
be initiated. However, any pending data transfers (reads or writes)
will be completed. The data bus will tri-state one cycle after the chip
is deselected or a write is initiated.
The IDT71V65703/5903 have an on-chip burst counter. In the burst
mode, the IDT71V65703/5903 can provide four cycles of data for a single
address presented to the SRAM. The order of the burst sequence is
defined by the
LBO
input pin. The
LBO
pin selects between linear and
interleaved burst sequence. The ADV/LD signal is used to load a new
external address (ADV/LD = LOW) or increment the internal burst counter
(ADV/LD = HIGH).
The IDT71V65703/5903 SRAMs utilize a high-performance CMOS
process and are packaged in a JEDEC Standard 14mm x 20mm 100-
pin plastic thin quad flatpack (TQFP), 119 ball grid array (BGA) and a 165
fine pitch ball grid array (fBGA).
Pin Description Summary
A
0
-A
18
CE
1
, CE
2
,
CE
2
OE
R/W
CEN
BW
1
,
BW
2
,
BW
3
,
BW
4
CLK
ADV/LD
LBO
ZZ
I/O
0
-I/O
31
, I/O
P1
-I/O
P4
V
DD
, V
DDQ
V
SS
Address Inputs
Chip Enables
Output Enable
Read/Write Signal
Clock Enable
Individual Byte Write Selects
Clock
Advance Burst Address/Load New Address
Linear/Interleaved Burst Order
Sleep Mode
Data Input/Output
Core Power, I/O Power
Ground
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
I/O
Supply
Supply
Synchronous
Synchronous
Asynchronous
Synchronous
Synchronous
Synchronous
N/A
Synchronous
Static
Asynchronous
Synchronous
Static
Static
5298 tbl 01
ZBT and Zero Bus Turnaround are trademarks of Integrated Device Technology, Inc. and the architecture is supported by Micron Technology and Motorola, Inc.
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