Section 3 Mcu Operating Modes; Operating Mode Selection - Renesas H8SX/1520 Series Hardware Manual

3.1

Operating Mode Selection

This LSI has three operating modes (modes 1 to 3). The operating mode is selected by the setting
of mode pins (MD1 and MD0). Table 3.1 lists MCU operating mode settings.
In this LSI, advanced mode for the CPU operating mode and 16-Mbyte address space are
available. LSI initiation mode can be selected from boot mode and user boot mode for
programming/erasing the flash memory and single chip initiation mode.
Table 3.1
MCU
Operating
Mode MD1
1 0
2 1
3 1
In mode 1 and mode 2, which are user boot mode and boot mode, the flash memory can be
programmed and erased. For details on user boot mode and boot mode, see section 17, Flash
Memory (0.18-µm F-ZTAT Version).
In mode 3, this LSI operates in single chip mode.
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Section 3 MCU Operating Modes

MCU Operating Mode Settings
CPU
Operating
MD0 Mode
1 Advanced
0
1
Address
Space Description
16 Mbytes User boot mode
Boot mode
Single chip initiation mode

Section 3 MCU Operating Modes

On-Chip ROM
Enabled
Enabled
Enabled
Rev. 3.00 Mar. 14, 2006 Page 67 of 804
REJ09B0104-0300