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Renesas RX Series

Renesas RX Series
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R01UH0823EJ0100 Rev.1.00 Page 1686 of 1823
Jul 31, 2019
RX23W Group 50. Flash Memory (FLASH)
Figure 50.9 Procedure for Transition from ROM/E2 DataFlash Read Mode to E2 DataFlash P/E Mode
Note 1. t
DSTOP
: STOP recovery time (Refer to the Electrical Characteristics chapter.)
Note 2. The ROM cannot be rewritten in low-speed operating mode.
Start in ROM/E2 DataFlash
read mode
FENTRYR register = AA80h
Yes
End in E2 DataFlash
P/E mode
No
OPCCR.OPCM[2:0] bits
= 000b?
Set E2 DataFlash P/E mode
High-speed operating mode Middle-speed operating mode
Set the FCLK frequency in
the FISR.PCKA[4:0] bits
Wait for t
DSTOP
*1
Set 10h in
the FPMCR register
FPR register = A5h
FPMCR register = 10h
FPMCR register = EFh
FPMCR register = 10h
FPR register = A5h
FPMCR register = 50h
FPMCR register = AFh
FPMCR register = 50h
Set 50h in
the FPMCR register

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