SH7125_08 Datasheet, PDF (69/774 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 3 MCU Operating Modes
Section 3 MCU Operating Modes
3.1 Selection of Operating Modes
This LSI has four MCU operating modes and three on-chip flash memory programming modes.
The operating mode is determined by the setting of FWE, MD1, and MD0 pins. Table 3.1 shows
the allowable combinations of these pin settings; do not set these pins in the other way than the
shown combinations.
When power is applied to the system, be sure to conduct power-on reset.
The MCU operating mode can be selected from MCU extension modes 0 to 2 and single chip
mode. For the on-chip flash memory programming mode, boot mode, user boot mode, and user
program mode, which are on-chip programming modes are available.
Table 3.1 Selection of Operating Modes
Pin Setting
Mode No. FWE
MD1
Mode Name
Mode 3
0
1
Single chip mode
Mode 4*¹ 1
0
Boot mode
Mode 6*² 1
1
User program mode
Notes: 1. Flash memory programming mode.
2. Prohibited in SH71241.
On-Chip ROM
Active
Active
Active
Rev. 4.00 Jul. 25, 2008 Page 49 of 750
REJ09B0243-0400