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M58PR001LE датащи(PDF) 105 Page - STMicroelectronics

номер детали M58PR001LE
подробное описание детали  256-Mbit, 512-Mbit or 1-Gbit (횞 16, multiple bank, multilevel, burst) 1.8 V supply Flash memories
PDF  119 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M58PR001LE датащи(HTML) 105 Page - STMicroelectronics

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 105 / 119 page
background image
M58PR256LE, M58PR512LE, M58PR001LE
Flowcharts and pseudocodes
105/119
Figure 23.
Block erase and EFA block erase flowchart and pseudocode
1.
Any address within the bank can equally be used.
2.
If an error is found, the Status Register must be cleared before further program/erase operations.
Write 20h (Main Array)
or 24h (EFA) (1)
AI12858
Start
Write Block
Address & D0h
Read Status
Register (1)
YES
NO
SR7 = 1
YES
NO
SR3 = 0
YES
SR4, SR5 = 1
VPP Invalid
Error (2)
Command
Sequence Error (2)
NO
NO
SR5 = 0
Erase Error (2)
End
YES
NO
SR1 = 0
Erase to Protected
Block Error (2)
YES
erase_command ( blockToErase )
/* EFA_erase_command (blockToErase) { */
writeToFlash (blockToErase, 0x20) ;
/* writeToFlash (blockToErase, 0x24) */
/* 20h is the command for Block Erase while 24h is the
command for Erase EFA Block*/
/*see note (1) */
writeToFlash (blockToErase, 0xD0) ;
/* only A12-Amax are significannt */
/* Memory enters read status state after
the Erase Command */
} while (status_register.SR7== 0) ;
do {
status_register=readFlash (blockToErase) ;
/* see note (1) */
/* E or G must be toggled*/
if (status_register.SR3==1) /*VPP invalid error */
error_handler ( ) ;
if ( (status_register.SR4==1) && (status_register.SR5==1) )
/* command sequence error */
error_handler ( ) ;
if (status_register.SR1==1) /*program to protect block error */
error_handler ( ) ;
if ( (status_register.SR5==1) )
/* erase error */
error_handler ( ) ;
}



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