công cụ tìm kiếm bảng dữ liệu linh kiện điện tử
  Vietnamese  ▼
ALLDATASHEET.VN

X  

STK16C88 bảng dữ liệu(PDF) 8 Page - Simtek Corporation

tên linh kiện STK16C88
Giải thích chi tiết về linh kiện  32Kx8 AutoStore nvSRAM
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  SIMTEK [Simtek Corporation]
Trang chủ  http://www.simtek.com
Logo SIMTEK - Simtek Corporation

STK16C88 bảng dữ liệu(HTML) 8 Page - Simtek Corporation

Back Button STK16C88 Datasheet HTML 4Page - Simtek Corporation STK16C88 Datasheet HTML 5Page - Simtek Corporation STK16C88 Datasheet HTML 6Page - Simtek Corporation STK16C88 Datasheet HTML 7Page - Simtek Corporation STK16C88 Datasheet HTML 8Page - Simtek Corporation STK16C88 Datasheet HTML 9Page - Simtek Corporation STK16C88 Datasheet HTML 10Page - Simtek Corporation STK16C88 Datasheet HTML 11Page - Simtek Corporation STK16C88 Datasheet HTML 12Page - Simtek Corporation  
Zoom Inzoom in Zoom Outzoom out
 8 / 12 page
background image
8
February, 2007
Document Control #ML0018 Rev 0.3
STK16C88
The AutoStore+ STK16C88 is a fast 32K x 8 SRAM
that does not lose its data on power-down. The data
is preserved in integral QuantumTrap non-volatile
storage elements when power is lost. Automatic
STORE on power-down and automatic RECALL on
power-up guarantee data integrity without the use of
batteries.
NOISE CONSIDERATIONS
Note that the STK16C88 is a high-speed memory
and so must have a high-frequency bypass capaci-
tor of approximately 0.1
μF connected between V
CC
and V
SS, using leads and traces that are as short as
possible. As with all high-speed CMOS ICs, normal
careful routing of power, ground and signals will help
prevent noise problems.
SRAM READ
The STK16C88 performs a READ cycle whenever E
and G are low and W is high. The address specified
on pins A
0-14 determines which of the 32,768 data
bytes will be accessed. When the READ is initiated
by an address transition, the outputs will be valid
after a delay of t
AVQV (READ cycle #1). If the READ is
initiated by E or G, the outputs will be valid at t
ELQV or
at t
GLQV, whichever is later (READ cycle #2). The data
outputs will repeatedly respond to address changes
within the t
AVQV access time without the need for tran-
sitions on any control input pins, and will remain valid
until another address change or until E or G is
brought high.
SRAM WRITE
A WRITE cycle is performed whenever E and W are
low. The address inputs must be stable prior to
entering the WRITE cycle and must remain stable
until either E or W goes high at the end of the cycle.
The data on the common I/O pins DQ
0-7 will be writ-
ten into the memory if it is valid t
DVWH before the end
of a W controlled WRITE or t
DVEH before the end of an
E controlled WRITE.
It is recommended that G be kept high during the
entire WRITE cycle to avoid data bus contention on
the common I/O lines. If G is left low, internal circuitry
will turn off the output buffers t
WLQZ after W goes low.
AutoStore+ OPERATION
The STK16C88’s automatic STORE on power-down
is completely transparent to the system. The
STORE initiation takes less than 500ns when power
is lost (V
CC < VSWITCH) at which point the part depends
only on its internal capacitor for STORE completion.
If the power supply drops faster than 20
μs/volt
before Vcc reaches Vswitch, then a 2.2 ohm resistor
should be inserted between Vcc and th system sup-
ply to avoid a momentary excess of current between
Vcc and internal capacitor.
In order to prevent unneeded STORE operations,
automatic STOREs will be ignored unless at least
one WRITE operation has taken place since the
most recent STORE or RECALL cycle. Software
initiated STORE cycles are performed regardless of
whether or not a WRITE operation has taken place.
POWER-UP RECALL
During power up, or after any low-power condition
(V
CC < VRESET), an internal RECALL request will be
latched. When V
CC once again exceeds the sense
voltage of V
SWITCH, a RECALL cycle will automatically
be initiated and will take t
RESTORE to complete.
If the STK16C88 is in a WRITE state at the end of
power-up RECALL, the SRAM data will be cor-
rupted. To help avoid this situation, a 10k
Ω resistor
should be connected either between W and system
V
CC or between E and system VCC.
SOFTWARE NONVOLATILE STORE
The STK16C88 software STORE cycle is initiated
by executing sequential READ cycles from six spe-
cific address locations. During the STORE cycle,
previous non-volatile data is erased and then the
SRAM contents are written to the non-volatile stor-
age elements. Once a STORE cycle is initiated, fur-
ther inputs and outputs are disabled until the cycle is
completed.
Because a sequence of READs from specific
addresses is used for STORE initiation, it is impor-
tant that no other READ or WRITE accesses inter-
vene in the sequence or the sequence will be
aborted and no STORE or RECALL will take place.
To initiate the software STORE cycle, the following
READ
sequence must be performed:
nvSRAM OPERATION


Số phần tương tự - STK16C88

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
List of Unclassifed Man...
STK16C88 ETC1-STK16C88 Datasheet
197Kb / 10P
   32K x 8 AutoStorePlus nvSRAM QuantumTrap CMOS Nonvolatile Static RAM
logo
Simtek Corporation
STK16C88 SIMTEK-STK16C88 Datasheet
359Kb / 13P
   32Kx8 AutoStore nvSRAM
logo
Cypress Semiconductor
STK16C88 CYPRESS-STK16C88 Datasheet
468Kb / 14P
   256 Kbit (32K x 8) AutoStore nvSRAM
logo
List of Unclassifed Man...
STK16C88-25 ETC1-STK16C88-25 Datasheet
197Kb / 10P
   32K x 8 AutoStorePlus nvSRAM QuantumTrap CMOS Nonvolatile Static RAM
STK16C88-25I ETC1-STK16C88-25I Datasheet
197Kb / 10P
   32K x 8 AutoStorePlus nvSRAM QuantumTrap CMOS Nonvolatile Static RAM
More results

Mô tả tương tự - STK16C88

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Simtek Corporation
STK14C88-3 SIMTEK-STK14C88-3 Datasheet
492Kb / 17P
   32Kx8 AutoStore nvSRAM
STK16C88 SIMTEK-STK16C88_08 Datasheet
359Kb / 13P
   32Kx8 AutoStore nvSRAM
STK14D88 SIMTEK-STK14D88_08 Datasheet
519Kb / 20P
   32Kx8 Autostore nvSRAM
STK14C88 SIMTEK-STK14C88 Datasheet
397Kb / 19P
   32Kx8 AutoStore nvSRAM
STK14D88 SIMTEK-STK14D88 Datasheet
564Kb / 19P
   32Kx8 Autostore nvSRAM
logo
Cypress Semiconductor
STK14D88 CYPRESS-STK14D88 Datasheet
422Kb / 17P
   32Kx8 AutoStore nvSRAM
logo
Simtek Corporation
STK14C88 SIMTEK-STK14C88_08 Datasheet
388Kb / 19P
   32Kx8 AutoStore nvSRAM
STK14C88-3 SIMTEK-STK14C88-3_08 Datasheet
425Kb / 18P
   32Kx8 AutoStore nvSRAM
STK16C88-3 SIMTEK-STK16C88-3_08 Datasheet
343Kb / 13P
   32Kx8 AutoStore nvSRAM
STK16C88-3 SIMTEK-STK16C88-3 Datasheet
363Kb / 12P
   32Kx8 AutoStore nvSRAM
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


bảng dữ liệu tải về

Go To PDF Page


Link URL




Chính sách bảo mật
ALLDATASHEET.VN
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không?  [ DONATE ] 

Alldatasheet là   |   Quảng cáo   |   Liên lạc với chúng tôi   |   Chính sách bảo mật   |   Trao đổi link   |   Tìm kiếm theo nhà sản xuất
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com