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參數(shù)資料
| 型號： | PF38F40L0YUQ0 |
| 廠商： | NUMONYX |
| 元件分類： | PROM |
| 英文描述： | 16M X 16 FLASH 1.8V PROM, PBGA88 |
| 封裝： | 8 X 11 MM, 1 MM HEIGHT, ROHS COMPLIANT, VFBGA-88 |
| 文件頁數(shù)： | 62/99頁 |
| 文件大?。?/td> | 1419K |
| 代理商： | PF38F40L0YUQ0 |
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Intel StrataFlash Wireless Memory (L18) with A/D-Multiplexed I/O
July 2006
Datasheet
Order Number: 313295-002US
65
Intel StrataFlash Wireless Memory (L18)
14.0
Dual-Operation Considerations
The multi-partition architecture of the device allows background programming (or
erasing) to occur in one partition while data reads (or code execution) take place in
another partition.
14.1
Memory Partitioning
The flash memory array is divided into multiple 8-Mbit partitions, which allows
simultaneous read-while-write operations. Simultaneous program and erase is not
allowed. Only one partition at a time can be in program or erase mode.
The flash device supports read-while-write operations with bus cycle granularity and
not command granularity. In other words, it is not assumed that both bus cycles of a
two cycle command (an erase command for example) will always occur as back to back
bus cycles to the flash device. In practice, code fetches (reads) may be interspersed
between write cycles to the flash device, and they will likely be directed to a different
partition than the one being written. This is especially true when a processor is
executing code from one partition that instructs the processor to program or erase in
another partition.
14.2
Read-While-Write Command Sequences
When issuing commands to the device, a read operation can occur between 2-cycle
Write command’s (Figure 22, and Figure 23). However, a write operation issued
between a 2-cycle commands write sequence causes a command sequence error. (See
When reading from the same partition after issuing a Setup command, Status Register
data is returned, regardless of the read mode of the partition prior to issuing the Setup
command.
Figure 22. Operating Mode with Correct Command Sequence Example
Partition A
Data: 0x20
Partition A
Data: 0xD0
Partition B
Data: 0xFF
Address/Data [A/D]
ADV#
CE#
WE# [W]
OE# [G]
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