- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄224596 > NAND256W4A2AZA6E (NUMONYX) 16M X 16 FLASH 3V PROM, 12000 ns, PBGA55 PDF資料下載
參數(shù)資料
| 型號： | NAND256W4A2AZA6E |
| 廠商： | NUMONYX |
| 元件分類： | PROM |
| 英文描述： | 16M X 16 FLASH 3V PROM, 12000 ns, PBGA55 |
| 封裝： | 8 X 10 MM, 1 MM HEIGHT, 0.80 MM PITCH, ROHS COMPLIANT, VFBGA-55 |
| 文件頁數(shù)： | 50/58頁 |
| 文件大?。?/td> | 1406K |
| 代理商： | NAND256W4A2AZA6E |
第1頁第2頁第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頁第49頁當前第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁
Hardware interface examples
NAND128-A, NAND256-A
Appendix A
Hardware interface examples
NAND flash devices can be connected to a microcontroller system bus for code and data
storage. For microcontrollers that have an embedded NAND controller the NAND flash can
be connected without the addition of glue logic (see Figure 38). However, a minimum of glue
logic is required for general purpose microcontrollers that do not have an embedded NAND
controller. The glue logic usually consists of a flip-flop to hold the Chip Enable, Address
Latch Enable, and Command Latch Enable signals stable during command and address
latch operations, and some logic gates to simplify the firmware or make the design more
robust.
Figure 39 provides an example of how to connect a NAND flash to a general purpose
microcontroller. The additional OR gates allow the microcontroller’s Output Enable and
Write Enable signals to be used for other peripherals. The OR gate between A3 and CSn
maps the flip-flop and NAND I/O in different address spaces inside the same chip select
unit, which improves the setup and hold times and simplifies the firmware. The structure
uses the microcontroller DMA (direct memory access) engines to optimize the transfer
between the NAND flash and the system RAM.
For any interface with glue logic, the extra delay caused by the gates and flip-flop must be
taken into account. This delay must be added to the microcontroller’s AC characteristics and
register settings to get the NAND flash setup and hold times.
For mass storage applications (hard disk emulations or systems where a huge amount of
storage is required) NAND flash memories can be connected together to build storage
modules (see Figure 40).
Figure 38.
Connection to microcontroller, without glue logic
AI08045b
R
W
I/O
E
AL
CL
W
G
CSn
AD(24:16)
Microcontroller
NAND
Flash
DQ
WP
RB
PWAITEN
AD17
AD16
VDD
VDD or VSS
or General Purpose I/O
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NCP303LSN41T1 | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| NCS6416DWG | 8-CHANNEL, VIDEO MULTIPLEXER, PDSO20 |
| NCS6S4803L5C | 1-OUTPUT 5 W DC-DC REG PWR SUPPLY MODULE |
| NCT050C-20.0000 | CRYSTAL OSCILLATOR, CLOCK, 20 MHz, TTL OUTPUT |
| NCT250A-FREQ-OUT3 | CRYSTAL OSCILLATOR, CLOCK, 4 MHz - 20 MHz, TTL OUTPUT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NAND32GAH0HZA5E | 制造商:Micron Technology Inc 功能描述:NAND EMMC - Trays |
| NAND32GAH0HZA5F | 制造商:Micron Technology Inc 功能描述:NAND EMMC - Tape and Reel |
| NAND32GAH0PZA5E | 制造商:Micron Technology Inc 功能描述:EMMC 4.3 4GB 12X16 41NM - Trays |
| NAND32GAH0PZA5F | 制造商:Micron Technology Inc 功能描述:NAND EMMC - Tape and Reel |
| NAND32GAHAKZO6E | 制造商:Micron Technology Inc 功能描述:AUTOMOTIVE - Trays |
發(fā)布緊急采購，3分鐘左右您將得到回復。