HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 907

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Notes: Do not apply a constant high level to the FWE pin. A high level should be applied to
the FWE pin only when programming or erasing flash memory. Also, while a high level
is applied to the FWE pin, the watchdog timer should be activated to prevent
overprogramming or overerasing due to program runaway, etc.
* For further information on FWE application and disconnection, see section 19.30,
Figure 19.70 Example of User Program Mode Execution Procedure
Flash Memory Programming and Erasing Precautions.
Execute programming/erase control
Write FWE assessment program
and transfer program
(and programming/erase control
program if necessary) beforehand
program (flash memory rewriting)
Branch to application program
Branch to programming/erase
MD2, MD1, MD0 = 101 or 111
control program in RAM area
Transfer programming/erase
control program to RAM
in flash memory
FWE = high*
Clear FWE*
Reset start
Rev.6.00 Sep. 27, 2007 Page 877 of 1268
REJ09B0220-0600
Section 19 ROM