ST10F276E datasheet(35/235 Pages) STMICROELECTRONICS

35 / 235 page

ST10F276E

Internal Flash memory

Doc ID 12303 Rev 3

35/235

4.3.10

Flash address register high

4.3.11

Flash error register

Flash error register, as well as all the other Flash registers, can be properly read only once

LOCK bit of register FCR0L is low. Nevertheless, its content is updated when also BSY bits

are reset as well; for this reason, it is definitively meaningful reading FER register content

only when LOCK bit and all BSY bits are cleared.

FARH (0x0E 0012)

FCR

Reset value: 0000h

765

210

Reserved

ADD20 ADD19 ADD18 ADD17 ADD16

Table 16.

Flash address register high

Bit

Function

ADD(20:16)

Address 20:16

These bits must be written with the address of the Flash location to program in the

following operations: word program and double word program.

FER (0xE 0014h)

FCR

Reset value: 0000h

765

210

Reserved

WPF RESER SEQER

Reserved

10ER

PGER ERER

ERR

Table 17.

Flash error register

Bit

Function

ERR

Write error

This bit is automatically set when an error occurs during a Flash write operation or

when a bad write operation setup is done. Once the error has been discovered and

understood, ERR bit must be software reset.

ERER

Erase error

This bit is automatically set when an erase error occurs during a Flash write operation.

This error is due to a real failure of a Flash cell, that can no more be erased. This kind

of error is fatal and the sector where it occurred must be discarded. This bit has to be

software reset.

PGER

Program error

This bit is automatically set when a program error occurs during a Flash write

operation. This error is due to a real failure of a Flash cell, that can no more be

programmed. The word where this error occurred must be discarded. This bit has to

be software reset.

10ER

1 over 0 error

This bit is automatically set when trying to program at 1 bits previously set at 0 (this

does not happen when programming the protection bits). This error is not due to a

failure of the Flash cell, but only flags that the desired data has not been written. This

bit has to be software reset.

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