M58PR256J datasheet(98/114 Pages) STMICROELECTRONICS

98 / 114 page

Flowcharts and pseudo codes

M58PR256J, M58PR512J

98/114

Figure 21.

Buffer Program flowchart and pseudo code

n + 1 is the number of data being programmed. The maximum buffer count is 1FF (512 Words).

Next Program data is an element belonging to buffer_Program[].data; Next Program address is an element belonging to

buffer_Program[].address. In a Program Region configured in Control Program mode buffer_Program[].data = FFFFh if A3

= 1.

Routine for Error Check by reading SR3, SR4 and SR1.

Read Status

at Bank Address

AI10516b

Start

Write Buffer Data,

Start Address

YES

X = n

End

Write n(1),

Start Address

X = 0

Write Next Buffer Data,

Next Program Address

X = X + 1

Program

Buffer to Flash

Confirm D0h

Read Status

SR7 = 1

YES

Full Status

(2)

SR7 = 1

YES

Buffer_Program_command (Start_Address, n, buffer_Program[] )

/*The start address must be aligned to a 1KB boundary

buffer_Program [] is an array structure used to store the address and

data to be programmed to the Flash memory (the address must be within

the segment Start Address and Start Address+n) */

{

status_register=readFlash (Bank_Address);

} while (status_register.SR7==0);

do {writeToFlash (Block_Address, 0xE9) ;

writeToFlash (Start_Address, n);

writeToFlash (buffer_Program[0].address, buffer_Program[0].data);

/*buffer_Program[0].address is the start address*/

x = 0;

while (x<n)

{ writeToFlash (buffer_Program[x+1].address, buffer_Program[x+1].data);

x++;

}

writeToFlash (Start_Address, 0xD0);

do {status_register=readFlash (Start_Address);

} while (status_register.SR7==0);

full_status_register_check();

}

Buffer Program E9h

command, Block Address

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