M58CR064P データシートの表示（PDF） - STMicroelectronics

部品番号

コンポーネント説明

メーカー

M58CR064P

64 Mbit (4Mb x 16, Dual Bank, Burst) 1.8V Supply Flash Memory

STMicroelectronics 

M58CR064C, M58CR064D, M58CR064P, M58CR064Q

Figure 24. Block Erase Flowchart and Pseudo Code

Start

Write 20h

Write Block

Address & D0h

Read Status

Register

erase_command ( blockToErase ) {

writeToFlash (bank_address, 0x20) ;

writeToFlash (blockToErase, 0xD0) ;

/* only A12-A20 are significannt */

/* Memory enters read status state after

the Erase Command */

do {

status_register=readFlash (bank_address) ;

/* E or G must be toggled*/

NO

SR7 = 1

YES

NO

SR3 = 0

YES

YES

SR4, SR5 = 1

NO

NO

SR5 = 0

YES

NO

SR1 = 0

YES

End

VPP Invalid

Error (1)

Command

Sequence Error (1)

Erase Error (1)

Erase to Protected

Block Error (1)

} while (status_register.SR7== 0) ;

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.SR5==1) )

/* erase error */

error_handler ( ) ;

if (status_register.SR1==1) /*program to protect block error */

error_handler ( ) ;

}

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

AI06174

62/70

Share Link: