HD6412340 HITACHI [Hitachi Semiconductor], HD6412340 Datasheet - Page 592

• Manufacturer Part Number: HD6412340
• Description: H8S/2345 F-ZTAT Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

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Notes: 1. Preprogramming (setting erase block data to all 0) is not necessary.
2. The values of x, y, z, , , , , , and N are shown in section 20.1.6, Flash Memory Characteristics.
3. Verify data is read in 16-bit (word) units.
4. Set only one bit in EBR1or EBR2. More than one bit cannot be set.
5. Erasing is performed in block units. To erase a number of blocks, the individual blocks must be erased sequentially.
Figure 17.22 Erase/Erase-Verify Flowchart (Single-Block Erase)
Increment
address
NG
NG
Set block start address to verify address
H'FF dummy write to verify address
*5
Clear ESU bit in FLMCR2
Clear SWE bit in FLMCR1
Set SWE bit in FLMCR1
Set ESU bit in FLMCR2
Clear EV bit in FLMCR1
Clear E bit in FLMCR1
Set EV bit in FLMCR1
Last address of block?
Set E bit in FLMCR1
erasing of all erase
Verify data = all 1?
Set EBR1, EBR2
Read verify data
End of erasing
Disable WDT
Enable WDT
Wait (z) ms
Wait ( ) s
Wait (x) s
Wait (y) s
Wait ( ) s
Wait ( ) s
Wait ( ) s
Wait ( ) s
blocks?
End of
n = 1
Start
OK
OK
OK
*1
*2
NG
*2
*4
*2
Start of erase
*2
Halt erase
*2
*2
*2
*2
*3
Clear SWE bit in FLMCR1
Clear EV bit in FLMCR1
Erase failure
Wait ( ) s
n
N?
OK
*2
NG
*2
n
n + 1