h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 681

• Manufacturer Part Number: h8s-2161b
• 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, , ,
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 23.12 Erase/Erase-Verify Flowchart
NG
NG
H'FF dummy write to verify address
, , , and N are shown in sections 28.1.6 and 28.2.6, Flash Memory Characteristics.
Clear ESU bit in FLMCR2
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
5
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 ( ) s
Wait ( x ) s
Wait ( y ) s
Wait ( ) s
Wait ( ) s
Wait ( ) s
Wait ( ) s
Verify data
Wait ( ) s
= all "1"?
of block?
START
n = 1
OK
OK
OK
*
1
NG
*
*
2
2
*
*
*
Start of erasing
*
End of erasing
*
*
*
*
*
2
4
2
2
2
2
2
2
3
Rev. 3.00 Mar 21, 2006 page 627 of 788
Clear SWE bit in FLMCR1
Clear EV bit in FLMCR1
Wait ( ) s
Wait ( ) s
Erase failure
n ( N ) ?
OK
*
2
NG
*
*
n
REJ09B0300-0300
2
2
Section 23 ROM
n + 1