SH7147 Datasheet, PDF (821/1108 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 20 Flash Memory
Section 20 Flash Memory
This LSI has 512 Kbytes/384 Kbytes/256 Kbytes* of on-chip flash memory. The flash memory
has the following features.
20.1 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/384 Kbytes/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.
Note: * See the product lineup in section 1.1, Features.
Rev. 3.00 Oct. 06, 2008 Page 797 of 1080
REJ09B0230-0300