M28W320FCT datasheet(63/69 Pages) STMICROELECTRONICS

tên linh kiện	M28W320FCT

Giải thích chi tiết về linh kiện	32 Mbit (2Mb x16, Boot Block) 3V Supply Flash Memory

PDF	69 Pages

Scroll/Zoom	100%

nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

Trang chủ	http://www.st.com

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63 / 69 page

M28W320FCT, M28W320FCB

Flowcharts and pseudo codes

63/69

Figure 23.

Protection Register Program Flowchart and Pseudo Code

Status check of b1 (Protected Block), b3 (VPP Invalid) and b4 (Program Error) can be made after each program operation

or after a sequence.

If an error is found, the Status Register must be cleared before further Program/Erase Controller operations.

Write C0h

AI04381

Start

Write Address

& Data

Read Status

YES

b7 = 1

YES

b3 = 0

b4 = 0

VPP Invalid

Error (1, 2)

Program

Error (1, 2)

protection_register_program_command (addressToProgram, dataToProgram) {:

writeToFlash (any_address, 0xC0) ;

do {

status_register=readFlash (any_address) ;

/* E or G must be toggled*/

} while (status_register.b7== 0) ;

if (status_register.b3==1) /*VPP invalid error */

error_handler ( ) ;

YES

End

YES

b1 = 0

Program to Protected

Block Error (1, 2)

writeToFlash (addressToProgram, dataToProgram) ;

/*Memory enters read status state after

the Program Command*/

if (status_register.b4==1) /*program error */

error_handler ( ) ;

if (status_register.b1==1) /*program to protect block error */

error_handler ( ) ;

}

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