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參數(shù)資料
| 型號： | STK14C88-5L35M |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 32K x 8 AUTOSTORE nvSRAM QUANTUM TRAP CMOS NONVOLATILE STATIC RAM |
| 中文描述： | 32K的× 8自動存儲非易失量子端粒酶的CMOS非易失靜態(tài)RAM |
| 文件頁數(shù)： | 9/12頁 |
| 文件大小： | 85K |
| 代理商： | STK14C88-5L35M |
STK14C88-M
April 1999
5-51
SOFTWARE NONVOLATILE RECALL
A software
RECALL
cycle is initiated with a sequence
of
READ
operations in a manner similar to the soft-
ware
STORE
initiation. To initiate the
RECALL
cycle,
the following sequence of E controlled
READ
opera-
tions must be performed:
1.
2.
3.
4.
5.
6.
Read address
Read address
Read address
Read address
Read address
Read address
0E38 (hex)
31C7 (hex)
03E0 (hex)
3C1F (hex)
303F (hex)
0C63 (hex)
Valid READ
Valid READ
Valid READ
Valid READ
Valid READ
Initiate RECALLcycle
Internally,
RECALL
is a two-step procedure. First, the
SRAM
data is cleared, and second, the nonvolatile
information is transferred into the
SRAM
cells. After
the t
cycle time the
SRAM
will once again be
ready for
READ
and
WRITE
operations. The
RECALL
operation in no way alters the data in the
EEPROM
cells. The nonvolatile data can be recalled an unlim-
ited number of times.
AutoStore OPERATION
The STK14C88-M can be powered in one of three
modes.
During
STK14C88-M will draw current from V
CCX
to charge a
capacitor connected to the V
CAP
pin. This stored
charge will be used by the chip to perform a single
STORE
operation. After power up, when the voltage
on the V
pin drops below V
SWITCH
, the part will
automatically disconnect the V
CAP
CCX
and
initiate a
STORE
operation.
normal
AutoStore
operation,
the
Figure 2 shows the proper connection of capacitors
for automatic store operation. A charge storage
capacitor having a capacity of between 68
μ
F and
220
μ
F (
±
20%) rated at 6V should be provided.
In system power mode (Figure 3), both V
and
V
are connected to the + 5V power supply without
the 100
μ
F capacitor. In this mode the AutoStore
function of the STK14C88-M will operate on the
stored system charge as power goes down. The
user must, however, guarantee that V
CCX
does not
drop below 3.6V during the 10ms
STORE
cycle.
If an automatic
STORE
on power loss is not required,
then V
CCX
can be tied to ground and + 5V applied to
V
(Figure 4). This is the AutoStore Inhibit
mode, in which the AutoStore function is disabled.
If the STK14C88-M is operated in this configuration,
references to V
CCX
should be changed to V
CAP
throughout this data sheet. In this mode,
STORE
operations may be triggered through software con-
trol or the HSB pin. It is not permissable to change
between these three options “on the fly”.
In order to prevent unneeded
STORE
operations,
automatic
STORE
s as well as those initiated by
externally driving HSB low 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 a
WRITE
operation has taken place. An
optional pull-up resistor is shown connected to HSB.
This can be used to signal the system that the
AutoStore cycle is in progress.
Figure 2: AutoStore Mode
1
16
32
31
30
17
6
μ
F
6
0
μ
F
B
+
1
10k
Figure 3: System Power Mode
1
16
32
31
30
17
0
μ
F
B
1
1
Figure 4: AutoStore
Inhibit Mode
1
16
32
31
30
17
0
μ
F
B
1
1
*If HSB is not used, it should be left unconnected.
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|---|---|
| STK14C88-5L45M | 功能描述:NVRAM 32Kbx8 4.5-5.5V AutoStore RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| STK14C88A-WAF | 制造商:Cypress Semiconductor 功能描述:STK14C88A-WAF - Gel-pak, waffle pack, wafer, diced wafer on film |
| STK14C88-C45I | 功能描述:NVRAM 32Kbx8 4.5-5.5V AutoStore RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| STK14C88-L45I | 功能描述:IC NVSRAM 256KB 45NS 32-LCC RoHS:是 類別:集成電路 (IC) >> 存儲器 系列:- 標(biāo)準(zhǔn)包裝:150 系列:- 格式 - 存儲器:EEPROMs - 串行 存儲器類型:EEPROM 存儲容量:4K (2 x 256 x 8) 速度:400kHz 接口:I²C，2 線串口 電源電壓:2.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:8-VFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-DFN（2x3） 包裝:管件 產(chǎn)品目錄頁面:1445 (CN2011-ZH PDF) |
| STK14C88-N35 | 制造商:Simtek Corp 功能描述:32K X 8 NON-VOLATILE SRAM, 35 ns, PDSO32 |
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