- 您現在的位置：買賣IC網 > PDF目錄363878 > W28V400BT85C (WINBOND ELECTRONICS CORP) 4M(512K x 8/256K x 16) SMARTVOLTAGE FLASH MEMORY PDF資料下載
參數資料
| 型號： | W28V400BT85C |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | PROM |
| 英文描述： | 4M(512K x 8/256K x 16) SMARTVOLTAGE FLASH MEMORY |
| 中文描述： | 256K X 16 FLASH 2.7V PROM, 120 ns, PDSO48 |
| 封裝： | 12 X 20 MM, TSOP-48 |
| 文件頁數： | 4/48頁 |
| 文件大小： | 1822K |
| 代理商： | W28V400BT85C |
第1頁第2頁第3頁當前第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁
W28V400B/T
- 4 -
3. PRODUCT OVERVIEW
The W28V400B/T is a high-performance 4M-bit SmartVoltage Flash memory organized as 512k-byte
of 8 bits or 256k-word of 16 bits. The 512k-byte/256k-word of data is arranged in two 8k-byte/4k-word
boot blocks, six 8k-byte/4k-word parameter blocks and seven 64kbyte/32k-word main blocks which
are individually erasable in-system. The memory map is shown in Figure 3.
SmartVoltage technology provides a choice of V
DD
and V
PP
combinations, as shown in Table 1, to
meet system performance and power expectations. 2.7V V
DD
consumes approximately one-fifth the
power of 5V V
DD
. But, 5V V
DD
provides the highest read performance. V
PP
at 2.7, 3.3V and 5V
eliminates the need for a separate 12V converter, while V
PP
= 12V maximizes block erase and
word/byte write performance. In addition to flexible erase and program voltages, the dedicated V
PP
pin
gives complete data protection when V
PP
≤
V
PPLK
.
Table 1. V
DD
and
V
PP
Voltage Combinations Offered by SmartVoltage Technology
V
DD
VOLTAGE
2.7V
V
PP
VOLTAGE
2.7V, 3.3V, 5V, 12V
3.3V
3.3V, 5V, 12V
5V
5V, 12V
Internal V
DD
and V
PP
detection Circuitry automatically configures the device for optimized read and
write operations.
A Command User Interface (CUI) serves as the interface between the system processor and internal
operation of the device. A valid command sequence written to the CUI initiates device automation. An
internal Write State Machine (WSM) automatically executes the algorithms and timings necessary for
block erase and word/byte write operations.
A block erase operation erases one of the device’s 32k-word blocks typically within 0.39s (5V V
DD
,
12V V
PP
), 4k-word blocks typically within 0.25s (5V V
DD
, 12V V
PP
) independent of other blocks. Each
block can be independently erased 100,000 times. Block erase suspend mode allows system software
to suspend block erase to read or write data from any other block.
Writing memory data is performed in word/byte increments of the device’s 32k-word blocks typically
within 8.4
μ
S (5V V
DD
, 12V V
PP
), 4k-word blocks typically within 17
μ
S (5V V
DD
, 12V V
PP
). Word/byte
write suspend mode enables the system to read data or execute code from any other flash memory
array location.
The boot blocks can be locked for the #WP pin. Block erase or word/byte write for boot block must not
be carried out by #WP to Low and #RESET to V
IH
.
The status register indicates when the WSM’s block erase or word/byte write operation is finished.
The RY/#BY output gives an additional indicator of WSM activity by providing both a hardware signal
of status (versus software polling) and status masking (interrupt masking for background block erase,
for example). Status polling using RY/#BY minimizes both CPU overhead and system power
consumption. When low, RY/#BY indicates that the WSM is performing a block erase or word/byte
write. RY/#BY-high indicates that the WSM is ready for a new command, block erase is suspended
(and word/byte write is inactive), word/byte write is suspended, or the device is in deep power-down
mode.
相關PDF資料 |
PDF描述 |
|---|---|
| W28V400T | 4M(512K x 8/256K x 16) SMARTVOLTAGE FLASH MEMORY |
| W28V400TT85C | 4M(512K x 8/256K x 16) SMARTVOLTAGE FLASH MEMORY |
| W29C011AP-15 | 128K X 8 CMOS FLASH MEMORY |
| W29C011AS-15 | 128K X 8 CMOS FLASH MEMORY |
| W29C011A | 128K X 8 CMOS FLASH MEMORY |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W28V400T | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4M(512K x 8/256K x 16) SMARTVOLTAGE FLASH MEMORY |
| W28V400TT85C | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4M(512K x 8/256K x 16) SMARTVOLTAGE FLASH MEMORY |
| W28WH | 制造商:ETERNA 功能描述:TRACKLIGHT, FLEXIBLE TRACK COUPLER |
| W28-X01B-3 | 制造商:TE Connectivity 功能描述: |
| W28-X1015-3.70 | 功能描述:斷路器 W28-X1015-3.70=W28 RoHS:否 制造商:Phoenix Contact 產品:Device Circuit Breakers 產品類型:Thermomagnetic 電流額定值:2 A 電壓額定值 AC:240 V, 277 V 電壓額定值 DC:50 V 極數:1 Pole 執行器類型:Slide 電路功能:Trip Free 系列:CB TM1 工作溫度范圍:- 30 C to + 60 C 照明:No |
發布緊急采購，3分鐘左右您將得到回復。