Maxim Integrated MAXQ Family Users Guide: MAXQ8913 Supplement - Manual (Page 101)

MAXQ Family User’s Guide:
MAXQ8913 Supplement
25-2
25.2 In-Application Programming Functions
25.2.1 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).
In order to reprogram a flash location, it must first be erased by calling UROM_flashErasePage or UROM_flash-
EraseAll.
25.2.2 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 which is being
erased.
25.2.3 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 512-word page of flash memory.
Inputs: A[0]: Word address located in the page to be erased. (The page number is the high 9 bits 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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