upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 428
upd70f3017ay
Manufacturer Part Number
upd70f3017ay
Description
V850/sa1tm 32-/16-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD70F3017AY.pdf
(492 pages)
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16.7.14 Flow of erasing flash memory
executed in accordance with the specified calling procedure.
428
The procedure to erase the flash memory is illustrated below. The processing of each function number must be
Set RAM parameter
Clear number of times
write-back is repeated
Erase byte verify
Erase byte verify
Mask interrupts
Set V
Area write back
Undererase?
Undererase?
Write error?
Erase verify
Overerase?
Erase verify
Overerase?
Erase area
Pre-write
Erase
PP
Figure 16-19. Flow of Erasing Flash Memory
voltage
No
No
Yes
No
Yes
CHAPTER 16 FLASH MEMORY
User’s Manual U12768EJ4V1UD
Yes
Yes
No
Yes
No
... Function No. 11
... Function No. 14
... Function No. 4
... Function No. 3
... Function No. 13
... Function No. 3
... Function No. 4
Normal completion
Normal completion
Unmask interrupts
Unmask interrupts
Unmask interrupts
Unmask interrupts
Unmask interrupts
of repeating write-back is
Clear V
Clear V
Undererase error
Clear V
Clear V
Clear V
of repeating erasure is
Overerase error
number of times
number of times
Write error
exceeded?
exceeded?
Maximum
Maximum
PP
PP
PP
PP
PP
voltage
voltage
voltage
voltage
voltage
Yes
Yes
No
No
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