UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 611

• Manufacturer Part Number: UPD78F0890GK(A)-GAJ-AX
• Description: 8BIT MCU, 128K FLASH, 7K RAM, LQFP
• Manufacturer: NEC

Specifications of UPD78F0890GK(A)-GAJ-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 10
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

24.7 Programming Method
24.7.1 Controlling flash memory
24.7.2 Flash memory programming mode
the flash memory programming mode. To set the mode, set the FLMD0 pin to V
The following figure illustrates the procedure to manipulate the flash memory.
To rewrite the contents of the flash memory by using the dedicated flash memory programmer, set the 78K0/FE2 in
Change the mode by using a jumper when writing the flash memory on-board.
Table 24-6. Relationship Between FLMD0 Pin and Operation Mode After Reset Release
RESET
FLMD0
V
DD
FLMD0 pulse supply
Figure 24-12. Flash Memory Manipulation Procedure
FLMD0
V
Figure 24-13. Flash Memory Programming Mode
5.5 V
0
DD
V
V
0 V
0 V
0 V
DD
DD
CHAPTER 24 FLASH MEMORY
User’s Manual U17554EJ4V0UD
Normal operation mode
Flash memory programming mode
Flash memory programming
mode is set
Selecting communication mode
Manipulate flash memory
Operation Mode
Flash memory programming mode
End?
Start
End
Yes
FLMD0 pulse
DD
and clear the reset signal.
No
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