R01UH0823EJ0100 Rev.1.00 Page 1698 of 1823
Jul 31, 2019
RX23W Group 50. Flash Memory (FLASH)
50.7.4.5 Start-Up Area Information Program/Access Window Information Program
Figure 50.20 shows the procedure to issue the start-up area information program command and access window
information program command.
When the sequencer has directly entered ROM/PE mode from E2 DataFlash access disabled mode, set the
DFLCTL.DFLEN bit to 1 at the beginning of the procedure.
Figure 50.20 Procedure to Issue the Start-Up Area Information Program Command/Access Window
Information Program Command
Start in ROM P/E mode
Write 81h or 82h to FEXCR register
FEXCR register = 00h
FSTATR1.EXRDY flag = 1?
End in ROM P/E mode
No
FSTATR1.EXRDY flag = 0?
Yes
No
FASR.EXS bit = 1
FSTATR0.EILGLERR flag = 1 or
FSTATR0.PRGERR flag = 1?
No
Yes
Yes
FRESETR.FRESET bit = 1
FRESETR.FRESET bit = 0
Sequencer
initialization
Set programming data in registers
FWB0, FWB1, FWB2, and FWB3
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