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參數(shù)資料
| 型號： | 69F1608RPFK |
| 廠商： | MAXWELL TECHNOLOGIES |
| 元件分類： | PROM |
| 英文描述： | 128 Megabit (16M x 8-Bit) Flash Memory Module |
| 中文描述： | 16M X 8 FLASH 5V PROM MODULE, 35 ns, DFP24 |
| 封裝： | DFP-24 |
| 文件頁數(shù)： | 21/33頁 |
| 文件大小： | 817K |
| 代理商： | 69F1608RPFK |
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21
All data sheets are subject to change without notice
2005 Maxwell Technologies
All rights reserved.
128 Megabit (16Mx 8-Bit) Flash Memory Module
69F1608
01.07.05 REV 2
DEVICE OPERATION
PAGE READ
Upon initial device power up, the device defaults to Read1 mode. This operation is also initiated by writing
00h to the command register along with three address cycles. Once the command is latched, it does not
need to be written for the following page read operation. Three types of operations are available : random
read, serial page read and sequential read.
The randomread mode is enabled when the page address is changed. The 528 bytes of data within the
selected page are transferred to the data registers in less than 10 us(t
R
). The CPU can detect the completion
of this data transfer(t
R
) by analyzing the output of R/B pin. Once the data in a page is loaded into the regis-
ters, they may be read out in 50 ns cycle time by sequentially pulsing RE with CE staying low High to low
transitions of the RE clock output the data starting fromthe selected column address up to the last column
address(column 511 or 527 depending on state of SE pin).
After the data of last column address is clocked out, the next page is automatically selected for sequential
read.
Waiting 10 μs again allows for reading of the selected page. The sequential read operation is termnated by
bringing CE high. The way the Read1 and Read2 commands work is like a pointer set to either the main
area or the spare area. The spare area of bytes 512 to 527 may be selectively accessed by writing the
Read2 command with SE pin low Toggling SE during operation is prohibited. Addresses A0 to A3 set the
starting address of the spare area while addresses A4 to A7 are ignored. Unless the operation is aborted,
the page address is automatically incremented for sequential read as in Read1 operation and spare sixteen
bytes of each page may be sequentially read. The Read1 command (00h/01h) is needed to move the
pointer back to the main area. Figures 22 thru 25 show typical sequence and timngs for each read opera-
tion.
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