UPD78F0138 NEC, UPD78F0138 Datasheet - Page 452

• Manufacturer Part Number: UPD78F0138
• Description: (UPD78xxxx) 8-Bit Single-Chip Microcontrollers
• Manufacturer: NEC

27.7 Programming Method
27.7.1 Controlling flash memory
27.7.2 Flash memory programming mode
78F0138 in the flash memory programming mode. To set the mode, set the V
452
The following figure illustrates the procedure to manipulate the flash memory.
To rewrite the contents of the flash memory by using the dedicated flash programmer, set the
Change the mode by using a jumper when writing the flash memory on-board.
V
PP
RESET
10.0 V
V
V
DD
SS
10.0 V
V
V
PP
SS
V
Figure 27-18. Flash Memory Manipulation Procedure
PP
pulse supply
Figure 27-19. Flash Memory Programming Mode
Normal operation mode
Flash memory programming mode
CHAPTER 27
User’s Manual U16228EJ2V0UD
Flash memory programming
mode is set
Selecting communication mode
Manipulate flash memory
µ
PD78F0134, 78F0138
Operation mode
End?
Start
End
Yes
Flash memory programming mode
1
PP
pin and clear the reset signal.
No
V
2
PP
pulse
• • •
n
µ
PD78F0134 or