R01UH0822EJ0100 Rev.1.00
Page 946 of 1041
Jul 31, 2019
RX13T Group
31. Flash Memory (FLASH)
31.7.4.5
Unique ID Read
shows the procedure to issue the unique ID read command.
Figure 31.18
Procedure to Issue the Unique ID Read Command
Start in ROM P/E mode
FASR.EXS bit = 1
FSARH register = 00h
FSARL register = 0850h
FEARH register = 00h
FEARL register = 086Fh
FCR register = 85h
FSTATR0.ILGLERR flag = 1?
No
Yes
FSTATR0.ILGLERR flag = 1 or
FSTATR1.DRRDY flag = 1?
No
Yes
Read registers FRBH and FRBL
Read 4 bytes of unique ID.
FCR register = 95h
FCR.DRC bit = 1
FSTATR1.DRRDY flag = 0?
No
Yes
FCR register = 85h
FCR.DRC bit = 0
FSTATR1.DRRDY flag = 1 or
FSTATR1.FRDY flag = 1?
Yes
No
FSTATR1.DRRDY flag = 1?
No
Yes
FCR register = 00h
FSTATR1.FRDY flag = 0?
No
Yes
End in ROM P/E mode
Wait until an illegal command error
occurs or the state becomes ready for
data read.
End if an illegal command error occurs.
Wait until the DRRDY flag becomes 0.
Wait until the state becomes ready for
data read or the unique ID read
processing is completed.
If the state is ready for data read, the
processing continues.
Processing to end the command
Issue the unique ID read command.