HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 845
HD6412320
Manufacturer Part Number
HD6412320
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412320.pdf
(1302 pages)
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Section 19 ROM
19.15.2 User Program Mode
When set to user program mode, the chip can program and erase its flash memory by executing a
user program/erase control program. Therefore, on-board reprogramming of the on-chip flash
memory can be carried out by providing on-board means of FWE control and supply of
programming data, and storing a program/erase control program in part of the program area as
necessary.
To select user program mode, select a mode that enables the on-chip flash memory (mode 6 or 7),
and apply a high level to the FWE pin. In this mode, on-chip supporting modules other than flash
memory operate as they normally would in modes 6 and 7.
The flash memory itself cannot be read while the SWE bit is set to 1 to perform programming or
erasing, so the control program that performs programming and erasing should be run in on-chip
RAM or external memory. When the program is located in external memory, an instruction for
programming the flash memory and the following instruction should be located in on-chip RAM.
Figure 19.40 shows the procedure for executing the program/erase control program when
transferred to on-chip RAM.
Rev.6.00 Sep. 27, 2007 Page 815 of 1268
REJ09B0220-0600
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