H8S2639 Datasheet, PDF (887/1547 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 21B ROM (H8S/2638 Group, H8S/2639 Group, H8S/2630 Group)
*³
Erase setup
state
Normal mode
*¹
ESU = 1
ESU = 0
FWE = 1 FWE = 0
*²
On-board
programming mode
Software programming
disable state
SWE = 1
SWE = 0
Software
programming
enable
state
EV = 1
EV = 0
PSU = 1
PSU = 0
Erase-verify
mode
*⁴
Program
setup state
PV = 1
PV = 0
E=1
E=0
Erase mode
P=1
P=0
Program mode
Program-verify
mode
Notes: In order to perform a normal read of flash memory, SWE must be cleared to 0. Also note that verify-reads
can be performed during the programming/erasing process.
1.
: Normal mode
: On-board programming mode
2. Do not make a state transition by setting or clearing multiple bits simultaneously.
3. After a transition from erase mode to the erase setup state, do not enter erase mode without passing
through the software programming enable state.
4. After a transition from program mode to the program setup state, do not enter program mode without
passing through the software programming enable state.
Figure 21B-11 FLMCR1 Bit Settings and State Transitions
Rev. 6.00 Feb 22, 2005 page 827 of 1484
REJ09B0103-0600