Renesas RX Series User Manual

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

Renesas RX Series Specifications

General

Core	RXv1, RXv2, RXv3
Flash Memory	Up to 8 MB
RAM	Up to 1 MB
Operating Voltage	1.62V to 5.5V
Operating Temperature	-40°C to +85°C or +105°C
Package	BGA, LQFP
ADC Resolution	12-bit
DAC Resolution	12-bit
Communication Interfaces	SCI, SPI, I2C, USB, Ethernet, CAN
Architecture	32-bit
Security Features	Memory Protection Unit (MPU)