HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 714
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HD6417144
Manufacturer Part Number
HD6417144
Description
32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417144.pdf
(930 pages)
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19. Flash Memory (F-ZTAT Version)
19.6
There are two modes for programming/erasing of the flash memory; boot mode, which enables on-
board programming/erasing, and PROM programmer mode, in which programming/erasing is
performed with a PROM programmer. On-board programming/erasing can also be performed in
user program mode. At reset-start in reset mode, this LSI changes to a mode depending on the MD
pin settings and FWP pin setting, as shown in table 19.3.
When changing to boot mode, the boot program built into this LSI is initiated. The boot program
transfers the programming control program from the externally-connected host to on-chip RAM
via SCI1. After erasing the entire flash memory, the programming control program is executed.
This can be used for programming initial values in the on-board state or for a forcible return when
programming/erasing can no longer be done in user program mode. In user program mode,
individual blocks can be erased and programmed by branching to the user program/erase control
program prepared by the user.
Table 19.3 Setting On-Board Programming Modes
Rev.4.00 Mar. 27, 2008 Page 670 of 882
REJ09B0108-0400
MD1
0
1
On-Board Programming Modes
MD0
0
1
0
1
FWP
0
LSI State after Reset End
Boot mode
User program mode
Expanded mode
Single-chip mode
Expanded mode
Single-chip mode
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