Maxim-integrated MAXQ622 Manual do Utilizador descarregar pdf (Página 239)

MAXQ612/MAXQ622 User’s Guide

Maxim Integrated 17-3

17.1 In-Application Programming Functions

17.1.1 UROM_flashWrite

Notes:

• This function uses one stack level to save and restore values.

• If the watchdog reset function is active, it should be disabled before calling this function.

• If the flash location has already been programmed to a non-FFFF value, this function returns with an error (carry set).

To reprogram a flash location, it must first be erased by calling UROM_flashErasePage or UROM_flashEraseAll.

17.1.2 UROM_flashErasePage

Notes:

• If the watchdog reset function is active, it should be disabled before calling this function.

• When calling this function from flash, care should be taken that the return address is not in the page that is being

erased.

17.1.3 UROM_flashEraseAll

Notes:

• If the watchdog reset function is active, it should be disabled before calling this function.

• This function can only be called by code running from the RAM. Attempting to call this function while running from

the flash results in an error.

Function:

UROM_flashWrite

Summary:

Programs a single word of flash memory.

Inputs:

A[0]: Word address in program flash memory to write to.

A[1]: Word value to write to flash memory.

Outputs:

Carry: Set on error and cleared on success.

Destroys:

PSF, LC[1]

Function:

UROM_flashErasePage

Summary:

Erases (programs to 0FFFFh) a 256-word page of flash memory.

Inputs:

A[0]: Word address located in the page to be erased. (The page number is the high byte of A[0].)

Outputs:

Carry: Set on error and cleared on success.

Destroys:

LC[1], A[0]

Function:

UROM_flashEraseAll

Summary:

Erases (programs to 0FFFFh) all locations in flash memory.

Inputs:

None.

Outputs:

Carry: Set on error and cleared on success.

Destroys:

LC[1], A[0]

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