NEC 78K0S/KA1+ User Manual page 282

(7) Flash write buffer register (FLW)
This register is used to store the data to be written to the flash memory.
This register is set with a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears these registers to 00H.
Address: FFA8H
Symbol 7
FLW FLW7
(8) Protect byte
This protect byte is used to specify the area that is to be protected from writing or erasing. The specified area
is valid only in the self programming mode. Because self programming of the protected area is invalid, the
data written to the protected area is guaranteed.
282
CHAPTER 18 FLASH MEMORY
Figure 18-18. Format of Flash Write Buffer Register (FLW)
After reset: 00H R/W
6 5
FLW6 FLW5
User's Manual U16898EJ3V0UD
4 3 2
FLW4 FLW3 FLW2
1 0
FLW1 FLW0