UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 285

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

(7) Flash write buffer register (FLW)
(8) Protect byte
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.
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.
Address: FFA8H
Symbol
FLW
FLW7
7
Figure 18-16. Format of Flash Write Buffer Register (FLW)
After reset: 00H
FLW6
6
CHAPTER 18 FLASH MEMORY
FLW5
User’s Manual U16898EJ5V0UD
5
R/W
FLW4
4
FLW3
3
FLW2
2
FLW1
1
FLW0
0
285