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ST92F120/F124/150/F250 TESTFLASH

3.5.3 Complete Aborted Swap (23002Fh)

Inputs: None.

Outputs: R0.

Variables: R192-R223 (for Stack).

Goal: complete the aborted Swap Phase after a Swap fail.

FEERR of FESR0 (224002h) and SWER of FESR1 (224003h) are set. After having executed

the “Find Wrong Pages routine” and the “Find Wrong Bytes routine”, and after having stored in

call:

CALLS

23h, 002Fh

;Complete Swap

This routine performs the following operations:

■

perform a Sector Erase operation on the old sector;

■

during the Sector Erase operation, a User routine is called toy refresh an external Watchdog

if necessary. 3.7 User routine for External Watchdog Refresh for details.

■

data;

■

write the VCSS0 register (222001h) with the number of the last completed Erase Phase on

the complementary sector;

The User Application should check the Output variable of the Complete Swap routine:

Register R0 shows if the Sector Erase operation has been completed correctly (Good Code:

A4h), or if has failed (Bad Code: 40h).

R0

X

Byte 8h+X OK

Byte 8h+X Wrong

R0

7

Byte Fh OK

Byte Fh Wrong

Table 5. Wrong Bytes Output Meaning

Reg

Bit

0 Meaning

1 Meaning