Datasheet

Section 7 ROM
Page 220 of 982 REJ09B0465-0300 Rev. 3.00
Sep 17, 2010
H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S/20235 Group
(4) Blank Checking
When H'25 is written in the first command cycle and H'D0 is written to any address in the block in
the second command cycle, blank checking of the specified block is started.
Completion of blank checking is indicated by the FMRDY bit in FLMSTR. The FMRDY bit is
read as 0 during blank checking, and read as 1 after blank checking completion.
After blank checking completion, the blank checking result can be checked by reading the
FMEBSF bit in FLMSTR. (See the description in (9) below, Full Status Checking.)
Figure 7.17 shows the blank checking flowchart.
The FMRDY bit in FLMSTR changes to 0 when blank checking is started, and changes to 1 when
completed.
No
Write software command H'25.
Write H'D0 to an address
in the specified block.
Start
Full status check
Blank checking end
Yes
FMRDY = 1?
Figure 7.17 Blank Checking Flowchart