R01UH0823EJ0100 Rev.1.00
Page 1688 of 1823
Jul 31, 2019
RX23W Group
50. Flash Memory (FLASH)
Figure 50.11
Procedure for Transition from E2 DataFlash P/E Mode to ROM/E2 DataFlash Read Mode
Start in
E2 DataFlash P/E mode
FENTRYR register = AA00h
End in ROM/E2 DataFlash
read mode
FENTRYR register = 0000h?
Yes
No
FPR register = A5h
FPMCR register = 08h
FPMCR register = F7h
FPMCR register = 08h
Set 08h in
the FPMCR register
Wait for t
MS
*1
Note 1. t
MS
: ROM mode transition wait time 2 (Refer to the Electrical Characteristics chapter.)