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IS66WVE1M16EALL-70BLI Datasheet(PDF) 2 Page - Integrated Silicon Solution, Inc

Part No. IS66WVE1M16EALL-70BLI
Description  16Mb Async/Page PSRAM
Download  34 Pages
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Maker  ISSI [Integrated Silicon Solution, Inc]
Homepage  http://www.issi.com
Logo ISSI - Integrated Silicon Solution, Inc

IS66WVE1M16EALL-70BLI Datasheet(HTML) 2 Page - Integrated Silicon Solution, Inc

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IS66/67WVE1M16EALL/EBLL/ECLL
IS66/67WVE1M16TALL/TBLL/TCLL
Rev. C | Oct. 2015
www.issi.com - SRAM@issi.com
General Description
PSRAM products are high-speed, CMOS pseudo-static random access memory developed
for low-power, portable applications. The 16Mb DRAM core device is organized
as 1 Meg x 16 bits. These devices include the industry-standard, asynchronous memory
interface found on other low-power SRAM or pseudo-SRAM (PSRAM) offerings.
For seamless operation on an asynchronous memory bus, PSRAM products incorporated a
transparent self-refresh mechanism. The hidden refresh requires no additional support
from the system memory controller and has no significant impact on device read/write
performance.
A user-accessible configuration registers (CR) defines how the PSRAM device performs on-
chip refresh and whether page mode read accesses are permitted. This register is
automatically loaded with a default setting during power-up and can be updated at any
time during normal operation.
Special attention has been focused on current consumption during self-refresh. This
product includes two system-accessible mechanisms to minimize refresh current.
Setting sleep enable (ZZ#) to LOW enables one of two low-power modes: partial-array
refresh (PAR) or deep power-down (DPD). PAR limits refresh to only that part of the
DRAM array that contains essential data. DPD halts refresh operation altogether and is
used when no vital information is stored in the device. The system-configurable refresh
mechanisms are accessed through the CR.
[ Functional Block Diagram]
Address
Decode Logic
Configuration Register
(CR)
1M X 16
DRAM
Memory Array
Input
/Output
Mux
And
Buffers
DQ0~DQ15
A0~A19
Control
Logic
CE#
WE#
OE#
LB#
UB#
ZZ#


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