SH7018 Datasheet, PDF (57/431 Pages) Renesas Technology Corp – SuperH™ RISC engine

Section 3 Operating Modes
3.1 Operating Mode Selection
The SH7018 has four operating modes: MCU mode, boot mode, user program mode, and
programmer mode. The settings of the mode pins (MD3 to MD0) determine the mode in which the
chip operates. The mode pin settings must not be changed while the chip is operating (while power
is being supplied).
The method of selecting the operating mode is shown in table 3.1.
Table 3.1 Operating Mode Selection
Pin Settings
FWP MD3*¹ MD2*¹ MD1 MD0
1
0
0
1
0
0
0
0
0
0
0
0
0
1
0
1
1
1
0
1
Notes: 1. F-ZTAT version only.
2. Set using BCR1 of BSC.
Operating Mode
On-Chip ROM CS0 Bus Width
MCU mode
Enabled
8 bits*²
Boot mode*¹
Enabled
8 bits*²
User program mode*¹ Enabled
8 bits*²
Programmer mode*¹ Enabled
—
3.2 Description of Operating Modes
MCU Mode: The on-chip ROM is enabled in the MCU mode. The bus width for the on-chip
ROM space is 32 bits.
Boot Mode: Refer to section 16.6.1 Boot Mode for information on the boot mode.
User Program Mode: Refer to section 16.6.2 User Program Mode for information on the user
program mode.
Programmer Mode: Refer to section 16.11 Flash Memory Programmer Mode for information on
the programmer mode.
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