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M58PR256J bảng dữ liệu(PDF) 104 Page - STMicroelectronics

tên linh kiện M58PR256J
Giải thích chi tiết về linh kiện  256 Mbit or 512 Mbit (x16, Multiple Bank, Multilevel, Burst) 1.8 V supply Flash memories
PDF  114 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M58PR256J bảng dữ liệu(HTML) 104 Page - STMicroelectronics

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 104 / 114 page
background image
Flowcharts and pseudo codes
M58PR256J, M58PR512J
104/114
Figure 27.
Protection Register Program flowchart and pseudo code
1.
Status check of SR1 (Protected Block), SR3 (VPP Invalid) and SR4 (Program Error) can be made after each program
operation or after a sequence.
2.
If an error is found, the Status Register must be cleared before further Program/Erase Controller operations.
Write C0h (1)
AI06177c
Start
Write Address
& Data
Read Status
Register (1)
YES
NO
SR7 = 1
YES
NO
SR3 = 0
NO
SR4 = 0
VPP Invalid
Error (2, 3)
Program
Error (2, 3)
protection_register_program_command (addressToProgram, dataToProgram) {:
writeToFlash (addressToProgram, 0xC0) ;
/*see note (1) */
do {
status_register=readFlash (addressToProgram) ;
/* see note (1) */
/* E or G must be toggled*/
} while (status_register.SR7== 0) ;
if (status_register.SR3==1) /*VPP invalid error */
error_handler ( ) ;
YES
End
YES
NO
SR1 = 0
Program to Protected
Block Error (2, 3)
writeToFlash (addressToProgram, dataToProgram) ;
/*Memory enters read status state after
the Program Command*/
if (status_register.SR4==1) /*program error */
error_handler ( ) ;
if (status_register.SR1==1) /*program to protect block error */
error_handler ( ) ;
}



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