M28W160BT70N1T View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M28W160BT70N1T

16 Mbit (1Mb x16, Boot Block) 3V Supply Flash Memory

STMicroelectronics 

APPENDIX C. FLOWCHARTS AND PSEUDO CODES

Figure 20. Program Flowchart and Pseudo Code

M28W160BT, M28W160BB

Start

Write 40h or 10h

Write Address

& Data

Read Status

Register

NO

b7 = 1

YES

NO

b3 = 0

YES

NO

b4 = 0

YES

NO

b1 = 0

YES

End

VPP Invalid

Error (1, 2)

Program

Error (1, 2)

Program to Protected

Block Error (1, 2)

program_command (addressToProgram, dataToProgram) {:

writeToFlash (any_address, 0x40) ;

/*or writeToFlash (any_address, 0x10) ; */

writeToFlash (addressToProgram, dataToProgram) ;

/*Memory enters read status state after

the Program Command*/

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 ( ) ;

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

error_handler ( ) ;

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

error_handler ( ) ;

}

AI03538b

Note: 1. Status check of b1 (Protected Block), b3 (VPP Invalid) and b4 (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.

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