SH7280 Datasheet, PDF (1411/1726 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine family

Section 26 Flash Memory
Section 26 Flash Memory
This LSI has 1-Mbyte on-chip flash memory. The flash memory has the following features.
26.1 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: 1 Mbyte (SH7286), 256 Kbytes (SH7243), 768 Kbytes (SH7285)
 Size of the user boot MAT, from which booting-up proceeds after a power-on reset in user
boot mode: 12 Kbytes (SH7286, SH7285)
• Three on-board programming modes and one off-board programming mode
On-board programming modes:
 Boot Mode: The on-chip SCIF 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 (SH7286, SH7285): 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. 1.00 Jun. 26, 2008 Page 1381 of 1692
REJ09B0393-0100