- 您現在的位置：買賣IC網 > PDF目錄363883 > W39V040FBPZ (WINBOND ELECTRONICS CORP) 512K X 8 CMOS FLASH MEMORY WITH FWH INTERFACE PDF資料下載
參數資料
| 型號： | W39V040FBPZ |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | PROM |
| 英文描述： | 512K X 8 CMOS FLASH MEMORY WITH FWH INTERFACE |
| 中文描述： | 512K X 8 FLASH 3.3V PROM, 11 ns, PQCC32 |
| 封裝： | LEAD FREE, PLASTIC, LCC-32 |
| 文件頁數： | 3/36頁 |
| 文件大小： | 518K |
| 代理商： | W39V040FBPZ |
第1頁第2頁當前第3頁第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
W39V040FA
Publication Release Date: December 19, 2002
- 3 -
Revision A2
6. FUNCTIONAL DESCRIPTION
Interface Mode Selection and Description
This device can operate in two interface modes, one is Programmer interface mode, and the other is
FWH interface mode. The IC pin of the device provides the control between these two interface
modes. These interface modes need to be configured before power up or return from #RESET
.
When
IC pin is set to high state, the device will be in the Programmer mode; while the IC pin is set to low
state (or leaved no connection), it will be in the FWH mode. In Programmer mode, this device just
behaves like traditional flash parts with 8 data lines. But the row and column address inputs are
multiplexed. The row address are mapped to the higher internal address A[18:11]. And the column
address are mapped to the lower internal address A[10:0]. For FWH mode, it complies with the FWH
Interface Specification. Through the FWH[3:0] and FWH4 to communicate with the system chipset .
Read (Write) Mode
In Programmer interface mode, the read (write) operation of the W39V040FA is controlled by #OE
(#WE). The #OE (#WE) is held low for the host to obtain (write) data from (to) the outputs (inputs).
#OE is the output control and is used to gate data from the output pins. The data bus is in high
impedance state when #OE is high. As for in the FWH interface mode, the read or write is determined
by the "bit 0 & bit 1 of START CYCLE ". Refer to the FWH cycle definition and timing waveforms for
further details.
Reset Operation
The #RESET input pin can be used in some application. When #RESET pin is at high state, the
device is in normal operation mode. When #RESET pin is at low state, it will halt the device and all
outputs will be at high impedance state. As the high state re-asserted to the #RESET pin, the device
will return to read or standby mode, it depends on the control signals.
Boot Block Operation and Hardware Protection at Initial- #TBL & #WP
There are two alternatives to set the boot block. Either 16K-byte or 64K-byte in the top location of this
device can be locked as boot block, which can be used to store boot codes. It is located in the last
16K/64K bytes of the memory with the address range from 7C000(hex)/70000(hex) to 7FFFF(hex).
See Command Codes for Boot Block Lockout Enable for the specific code. Once this feature is set the
data for the designated block cannot be erased or programmed (programming lockout), other memory
locations can be changed by the regular programming method.
Besides the software method, there is a hardware method to protect the top boot block and other
sectors. Before power on programmer, tie the #TBL pin to low state and then the top boot block will
not be programmed/erased. If #WP pin is tied to low state before power on, the other sectors will not
be programmed/erased.
In order to detect whether the boot block feature is set on or not, users can perform software
command sequence: enter the product identification mode (see Command Codes for
Identification/Boot Block Lockout Detection for specific code), and then read from address
7FFF2(hex). If the DQ0/DQ1 output data is "1," the 64Kbytes/16Kbytes boot block programming
lockout feature will be activated; if the DQ0/DQ1 output data is "0," the lockout feature will be
inactivated and the boot block can be erased/programmed. But the hardware protection will override
the software lock setting, i.e., while the #TBL pin is trapped at low state, the top boot block cannot be
相關PDF資料 |
PDF描述 |
|---|---|
| W39V040FBQ | 512K X 8 CMOS FLASH MEMORY WITH FWH INTERFACE |
| W39V040FBQZ | 512K X 8 CMOS FLASH MEMORY WITH FWH INTERFACE |
| W39V080AT | 1M 】 8 CMOS FLASH MEMORY WITH LPC INTERFACE |
| W39V080A | 1M 】 8 CMOS FLASH MEMORY WITH LPC INTERFACE |
| W39V080AP | 1M 】 8 CMOS FLASH MEMORY WITH LPC INTERFACE |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W39V040FBQ | 制造商:WINBOND 制造商全稱:Winbond 功能描述:512K X 8 CMOS FLASH MEMORY WITH FWH INTERFACE |
| W39V040FBQZ | 制造商:WINBOND 制造商全稱:Winbond 功能描述:512K X 8 CMOS FLASH MEMORY WITH FWH INTERFACE |
| W39V040FC | 制造商:WINBOND 制造商全稱:Winbond 功能描述:512K 】 8 CMOS FLASH MEMORY WITH FWH INTERFACE |
| W39V040FCP | 制造商:WINBOND 制造商全稱:Winbond 功能描述:512K 】 8 CMOS FLASH MEMORY WITH FWH INTERFACE |
| W39V040FCPZ | 制造商:WINBOND 制造商全稱:Winbond 功能描述:512K 】 8 CMOS FLASH MEMORY WITH FWH INTERFACE |
發布緊急采購，3分鐘左右您將得到回復。