MaximIntegrated 21-3
MAX31782 User’s Guide
Revision 0; 8/11
21.2In-ApplicationProgrammingFunctions
21.2.1UROM�flashWrite
Notes:
• This function uses two stack levels to save and restore values .
• If the watchdog reset function is active, it should be disabled before calling this function .
• Interrupts are disabled while in 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, the location must first be erased by calling UROM_flashErasePage or
UROM_flash EraseAll .
21.2.2UROM�flashErasePage
Notes:
• If the watchdog reset function is active, it should be disabled before calling this function .
• Interrupts are disabled while in 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 .
21.2.3UROM�flashEraseAll
Notes:
• If the watchdog reset function is active, it should be disabled before calling this function .
• Interrupts are disabled while in 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 .
A[1]: 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 FFFFh) a 512-byte page of flash memory .
Inputs
A[0]: Word address located in the page to be erased . (The page number is the upper 8 bits of A[0] .)
Outputs
Carry: Set on error and cleared on success .
Destroys
PSF, LC[1], GR, AP, APC, A[0]
Function
UROM_flashEraseAll
Summary
Erases (programs to FFFFh) all locations in flash memory
Inputs
None
Outputs
Carry: Set on error and cleared on success .
Destroys
PSF, GR, LC[1], LC[0], AP, APC, A[0]
