HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 113

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

3.1
3.1.1
Except for the H8S/2240, all H8S/2245 Group products have seven operating modes (modes 1 to
7). The H8S/2240 has three operating modes (modes 1, 4, and 5). These modes enable selection of
the CPU operating mode, enabling/disabling of on-chip ROM, and the initial bus width setting, by
setting the mode pins (MD
Table 3.1 lists the MCU operating modes.
Table 3.1
Note:
The CPU's architecture allows for 4 Gbytes of address space, but the H8S/2245 Group actually
accesses a maximum of 16 Mbytes.
Modes 1, 2, and 4 to 6 are externally expanded modes that allow access to external memory and
peripheral devices.
MCU
Operating
Mode
0
1
2*
3*
4
5
6*
7*
* Cannot be used in the H8S/2240.
Operating Mode Selection
Overview
MD
0
1
MCU Operating Mode Selection
2
MD
0
1
0
1
Section 3 MCU Operating Modes
1
MD
0
1
0
1
0
1
0
1
2
0
to MD
CPU
Operating
Mode
—
Normal
Advanced
0
).
Description
—
On-chip ROM disabled,
expanded mode
On-chip ROM enabled,
expanded mode
Single-chip mode
On-chip ROM disabled,
expanded mode
On-chip ROM enabled,
expanded mode
Single-chip mode
Rev.3.00 Mar. 26, 2007 Page 71 of 772
Section 3 MCU Operating Modes
On-chip
ROM
—
Disabled
Enabled
Disabled
Enabled
External Data Bus
Initial
Width
—
8 bits
8 bits
—
16 bits
8 bits
8 bits
—
REJ09B0355-0300
Max.
Width
—
16 bits
16 bits
—
16 bits
16 bits
16 bits
—