參數(shù)資料
型號： M30L0T8000B0ZAQE
廠商： STMICROELECTRONICS
元件分類： PROM
英文描述： 16M X 16 FLASH 1.8V PROM, 85 ns, PBGA88
封裝： 8 X 10 MM, 0.80 MM PITCH, LEAD FREE, BGA-88
文件頁數(shù)： 42/103頁
文件大?。?/td> 794K
代理商： M30L0T8000B0ZAQE
M30L0T8000T0, M30L0T8000B0
Read modes
43/103
7
Read modes
Read operations can be performed in two different ways depending on the settings in the
Configuration Register. If the clock signal is ‘don’t care’ for the data output, the read
operation is asynchronous; if the data output is synchronized with clock, the read operation
is synchronous.
The read mode and format of the data output are determined by the Configuration Register.
(See Configuration Register section for details). All banks support both asynchronous and
synchronous read operations.
7.1
Asynchronous Read Mode
In Asynchronous Read operations the clock signal is ‘don’t care’. The device outputs the
data corresponding to the address latched, that is the memory array, Status Register,
Common Flash Interface or Electronic Signature depending on the command issued. CR15
in the Configuration Register must be set to ‘1’ for asynchronous operations.
Asynchronous Read operations can be performed in two different ways, Asynchronous
Random Access Read and Asynchronous Page Read. Only Asynchronous Page Read
takes full advantage of the internal page storage so different timings are applied.
In Asynchronous Read mode a Page of data is internally read and stored in a Page Buffer.
The Page has a size of 8 Words and is addressed by address inputs A0, A1 and A2.
The first read operation within the Page has a longer access time (tAVQV, Random access
time), subsequent reads within the same Page have much shorter access times (tAVQV1,
Page access time). If the Page changes then the normal, longer timings apply again.
The device features an Automatic Standby mode. During Asynchronous Read operations,
after a bus inactivity of 150ns, the device automatically switches to the Automatic Standby
mode. In this condition the power consumption is reduced to the standby value and the
outputs are still driven.
In Asynchronous Read mode, the WAIT signal is always de-asserted.
details.
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