DatasheetQ Logo
Electronic component search and free download site. Transistors,MosFET ,Diode,Integrated circuits

M28W320 データシートの表示(PDF) - STMicroelectronics

部品番号
コンポーネント説明
メーカー
M28W320 Datasheet PDF : 69 Pages
First Prev 11 12 13 14 15 16 17 18 19 20 Next Last
Command interface
4
Command interface
M28W320FCT, M28W320FCB
All Bus Write operations to the memory are interpreted by the Command Interface.
Commands consist of one or more sequential Bus Write operations. An internal
Program/Erase Controller handles all timings and verifies the correct execution of the
Program and Erase commands. The Program/Erase Controller provides a Status Register
whose output may be read at any time during, to monitor the progress of the operation, or
the Program/Erase states. See Table 3: Command Codes, for a summary of the commands
and see Appendix D, and Table 32, Write State Machine Current/Next, for a summary of the
Command Interface.
The Command Interface is reset to Read mode when power is first applied, when exiting
from Reset or whenever VDD is lower than VLKO. Command sequences must be followed
exactly. Any invalid combination of commands will reset the device to Read mode. Refer to
Table 4: Commands, in conjunction with the text descriptions below.
4.1
Read Memory Array command
The Read command returns the memory to its Read mode. One Bus Write cycle is required
to issue the Read Memory Array command and return the memory to Read mode.
Subsequent read operations will read the addressed location and output the data. When a
device Reset occurs, the memory defaults to Read mode.
4.2
Read Status Register command
The Status Register indicates when a program or erase operation is complete and the
success or failure of the operation itself. Issue a Read Status Register command to read the
Status Register’s contents. Subsequent Bus Read operations read the Status Register at
any address, until another command is issued. See Table 11: Status Register Bits, for
details on the definitions of the bits.
The Read Status Register command may be issued at any time, even during a
Program/Erase operation. Any Read attempt during a Program/Erase operation will
automatically output the content of the Status Register.
16/69

Share Link: 

datasheetq.com  [ Privacy Policy ]Request Datasheet ] [ Contact Us ]