SH7125_08 Datasheet, PDF (598/774 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 17 Flash Memory
17.2.2 Operating Mode
When each mode pin and the FWE pin are set in the reset state and the reset signal is released, the
microcomputer enters each operating mode as shown in figure 17.2. For the setting of each mode
pin and the FWE pin, see tables 17.1 to 17.4.
• Flash memory can be read in user mode, but cannot be programmed or erased.
• Flash memory can be read, programmed, or erased on the board only in user program mode
and boot mode.
RES
User
=0
mode
setting
Reset state
User mode
FWE = 0
FWE = 1
User program
mode
Boot mode
On-board programming mode
Figure 17.2 Mode Transition of Flash Memory
Table 17.1 Relationship between FWE and MD Pins and Operating Modes
Pin
RES
FWE
MD1
Reset State
0
0/1
0/1
User Mode
1
0
1
User Program
Mode
1
1
1
Boot Mode
1
1
0
Rev. 4.00 Jul. 25, 2008 Page 578 of 750
REJ09B0243-0400