UPD78F9234MC-5A4-A Datasheet, PDF (314/419 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 19 FLASH MEMORY
19.8.10 Examples of operation when command execution time should be minimized in self programming
mode
Examples of operation when the command execution time should be minimized in self programming mode are
explained below.
(1) Erasure to blank check
<1> Mode is shifted from normal mode to self programming mode (<1> to <7> in 19.8.4)
<2> Execution of block erase → Error check (<1> to <12> in 19.8.6)
<3> Execution of block blank check → Error check (<1> to <11> in 19.8.7)
<4> Mode is shifted from self programming mode to normal mode (<1> to <6> in 19.8.5)
Figure 19-25. Example of Operation When Command Execution Time Should Be Minimized
(from Erasure to Blank Check)
Erasure to blank check
Figure 19-18
<1> to <7>
<1> Shift to self programming
mode
Figure 19-20
<1> to <12>
Figure 19-21
<1> to <11>
Figure 19-19
<1> to <6>
<2> Execute block erase
<2> Check execution result ^Abnormal
(VCERR and WEPRERR flags)
Normal
<3> Execute block blank check
<3> Check execution result Abnormal
(VCERR and WEPRERR flags)
Normal
<4> Shift to normal mode
Normal termination
Abnormal termination^Note
Note Perform processing to shift to normal mode in order to return to normal processing.
Remark <1> to <4> in Figure 19-25 correspond to <1> to <4> in 19.8.10 (1) above.
312
User’s Manual U17446EJ5V0UD