ST10F272M datasheet(34/175 Pages) STMICROELECTRONICS

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Internal Flash memory

ST10F272M

34/176

5.4.10

Flash address register high (FARH)

5.4.11

Flash error register (FER)

The Flash Error register, as well as all the other Flash registers, can be read only once the

LOCK bit of register FCR0L is low. Nevertheless, the FER content is updated after

completion of the Flash operation, that is, when BSY0 is reset. Therefore, the FER content

can only be read once the LOCK and BSY0 bits are cleared.

FARH (0x08 0012)

FCR

Reset value: 0000h

987

65432

Reserved

ADD20 ADD19 ADD18 ADD17 ADD16

RWRWRW

RWRW

Table 17.

Flash address register high

Bit

Name

Function

4:0 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 (0x8 0014h)

FCR

Reset value: 0000h

987

65432

Reserved

WPF RESER SEQER

Reserved

10ER

PGER ERER

ERR

Table 18.

Flash error register

Bit

Name

Function

0ERR

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.

1ERER

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.

2PGER

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.

310ER

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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