h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 483

• Manufacturer Part Number: h8s-2111b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Notes:
1. Prewriting (writing 0 to all data in erased block) is not necessary.
2. The values of x, y, z, α, β, γ, ε, η, θ, and N are shown in section 22.5, Flash Memory Characteristics.
3. Verify data is read in 16-bit (word) units.
4. Set only a single bit in EBR1 and EBR2. Do not set more than one bit.
5. Erasing is performed in block units. To erase multiple blocks, each block must be erased in turn.
Increment
address
Figure 18.10 Erase/Erase-Verify Flowchart
NG
NG
H'FF dummy write to verify address
Clear ESU bit in FLMCR2
* 5
Clear SWE bit in FLMCR1
Set SWE bit in FLMCR1
Set ESU bit in FLMCR2
Set block start address
All erase blocks erased?
Clear EV bit in FLMCR1
Clear E bit in FLMCR1
Set EV bit in FLMCR1
Set EBR1 and EBR2
Set E bit in FLMCR1
as verify address
Read verify data
End of erasing
Disable WDT
Enable WDT
Last address
Wait (z) ms
Wait (x) µs
Wait (y) µs
Wait (α) µs
Wait (β) µs
Wait (η) µs
Wait (γ) µs
Wait (ε) µs
Verify data
Wait (θ) µs
of block?
= all "1"?
START
n = 1
OK
OK
OK
* 1
NG
* 2
Start of erasing
End of erasing
* 2
* 4
* 2
* 2
* 2
* 2
* 2
* 2
* 3
Clear SWE bit in FLMCR1
Clear EV bit in FLMCR1
Rev. 1.00, 05/04, page 449 of 544
Wait (η) µs
Wait (θ) µs
Erase failure
n≥ (N) ?
OK
* 2
NG
* 2
n ← n + 1