SH7080_09 Datasheet, PDF (1275/1622 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family

Section 23 Flash Memory
Section 23 Flash Memory
This LSI has 512-kbyte or 256-kbyte on-chip flash memory. The flash memory has the following
features.
23.1 Features
• Two flash-memory MATs, with one selected by the mode in which the LSI starts up
The on-chip flash memory has two memory spaces in the same address space (hereafter
referred to as memory MATs). The mode setting when the LSI starts up determines the
memory MAT that is currently mapped. The MAT can be switched by bank-switching after the
LSI has started up.
⎯ Size of the user MAT, from which booting-up proceeds after a power-on reset in user
mode: 512 kbytes or 256 kbytes
⎯ Size of the user boot MAT, from which booting-up proceeds after a power-on reset in user
boot mode: 12 kbytes
• Three on-board programming modes and one off-board programming mode
On-board programming modes
Boot Mode: The on-chip SCI interface is used for programming in this mode. Either the user
MAT or user-boot MAT can be programmed, and the bit rate for data transfer between the host
and this LSI are automatically adjusted.
User Program Mode: This mode allows programming of the user MAT via any desired
interface.
User Boot Mode: This mode allows writing of a user boot program via any desired interface
and programming of the user MAT.
Off-board programming mode
Programmer Mode: This mode allows programming of the user MAT and user boot MAT
with the aid of a PROM programmer.
• Downloading of an on-chip program to provide an interface for programming/erasure
This LSI has a dedicated programming/erasing program. After this program has been
downloaded to the on-chip RAM, programming or erasing can be performed by setting
parameters as arguments. “User branching” is also supported.
Rev. 4.00 Dec. 15, 2009 Page 1215 of 1558
REJ09B0181-0400