Microchip Technology dsPIC30F - Page 104

dsPIC30F Family Reference Manual
DS70052C-page 5-8 © 2004 Microchip Technology Inc.
Register 5-2: NVMADR: Non-Volatile Memory Address Register
Register 5-3: NVMKEY: Non-Volatile Memory Key Register
Upper Byte:
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
NVMADR<15:8>
bit 15 bit 8
Lower Byte:
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
NVMADR<7:0>
bit 7 bit 0
bit 15-0 NVMADR<15:0>: NV Memory Write Address bits
Selects the location to program or erase in program or data Flash memory.
This register may be read or written by user. This register will contain the address of EA<15:0> of the
last table write instruction executed, until written by the user.
Note: The NVMADRU register function is similar to the NVMADR register and holds the upper 8 bits
of the location to be programmed or erased. The value of the TBLPAG register is automatically
loaded into the NVMADRU register during a table write instruction.
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
Upper Byte:
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
Lower Byte:
W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0
NVMKEY<7:0>
bit 7 bit 0
bit 15-8 Unimplemented: Read as ‘0’
bit 7-0 NVMKEY<7:0>: Key Register (Write Only) bits
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown