SH7050 Datasheet, PDF (71/841 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH RISC engine Family/

Section 3 Operating Modes
Section 3 Operating Modes
3.1 Operating Mode Selection
The SH7050 series has five operating modes that are selected by pins MD3 to MD0 and FWE. The
mode setting pins should not be changed during operation of the SH7050 series, and only the
setting combinations shown in table 3.1 should be used.
Table 3.1 Operating Mode Selection
Pin Settings
Operating
Mode No. FWE MD3 MD2 MD1 MD0 Mode Name
On-Chip Area 0
ROM
Bus Width
Mode 0 0
*
*0
0
MCU expanded mode Disabled 8 bits
Mode 1 0
01
16 bits
Mode 2 0
1
0
Enabled Set by BCR1
Mode 3 0
1
1
MCU single-chip mode Enabled —
Mode 16 1
0
0
Boot mode
Enabled Set by BCR1
Mode 17 1
01
—
Mode 18 1
1
0
User program mode Enabled Set by BCR1
Mode 19 1
11
—
Mode 13 0/1 1
1
0
1
Writer mode
Note: * Pins MD3 and MD2 set the clock operating mode. For details of the clock mode
settings, see section 4.2, Clock Operating Modes.
There are two normal operating modes: single-chip mode and expanded mode.
Modes in which the flash memory can be programmed are boot mode and user program mode (the
two on-board programming modes) and writer mode in which programming is performed with an
EPROM programmer (a type which supports programming of this device).
For details, see the sections on ROM.
Rev. 5.00 Jan 06, 2006 page 51 of 818
REJ09B0273-0500