HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 799

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Notes: 1. Prewriting (setting erase block data to all 0) is not necessary.
2. The values of x, y, z, α, β, γ, ε, η, θ, and N are shown in the section 22.2.6, Flash Memory Characteristics.
3. Verify data is read in 16-bit (W) 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.
Increment
address
NG
Figure 19.15 Erase/Erase-Verify Flowchart
NG
Set block start address to verify address
H'FF dummy write to verify address
*5
Clear ESU bit in FLMCR1
Clear SWE bit in FLMCR1
Set SWE bit in FLMCR1
Set ESU bit in FLMCR1
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 (α) μs
Wait (η) μs
Wait (x) μs
Wait (y) μs
Wait (β) μs
Wait (γ) μs
Wait (ε) μs
Wait (θ) μs
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
Rev.6.00 Sep. 27, 2007 Page 769 of 1268
Clear SWE bit in FLMCR1
Clear EV bit in FLMCR1
Erase failure
Wait (η) μs
Wait (θ) μs
n ≥ N?
OK
*2
REJ09B0220-0600
NG
*2
Section 19 ROM
n ← n + 1