SH7125 Datasheet, PDF (596/782 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer

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. 3.00 Sep. 27, 2007 Page 576 of 758
REJ09B0243-0300