HD6413003RVF RENESAS [Renesas Technology Corp], HD6413003RVF Datasheet - Page 75

• Manufacturer Part Number: HD6413003RVF
• Description: microcontroller (MCU)
• Manufacturer: RENESAS [Renesas Technology Corp]

3.1 Overview
3.1.1 Operating Mode Selection
The H8/3003 has four operating modes (modes 1 to 4) that are selected by the mode pins (MD
MD
and the initial bus mode.
Table 3-1 Operating Mode Selection
Operating Mode
—
Mode 1
Mode 2
Mode 3
Mode 4
—
—
—
Notes: 1. In all modes, an 8-bit or 16-bit data bus can be selected on a per-area basis by settings
For the address space size there are two choices: 1 Mbyte or 16 Mbytes. The external data bus is
either 8 or 16 bits wide depending on the settings in the area bus width control register (ABWCR).
If 8-bit access is selected for all areas, the external data bus is 8 bits wide. For details see
section 6, Bus Controller.
Modes 1 to 4 are externally expanded modes that enable access to external memory and peripheral
devices. Modes 1 and 2 support a maximum address space of 1 Mbyte. Modes 3 and 4 support a
maximum address space of 16 Mbytes.
The H8/3003 can only be used in modes 1 to 4. The inputs at the mode pins must select one of
these four modes. The inputs at the mode pins must not be changed during operation.
0
) as indicated in table 3-1. The input at these pins determines the size of the address space
2. If the RAM enable bit (RAME) in the system control register (SYSCR) is cleared to 0,
made in the area bus width control register (ABWCR). For details see section 6, Bus
Controller.
these addresses become external addresses.
MD
0
0
0
0
1
1
1
1
Section 3 MCU Operating Modes
Mode Pins
2
MD
0
0
1
1
0
0
1
1
1
MD
0
1
0
1
0
1
0
1
0
Address Space
—
1 Mbyte
1 Mbyte
16 Mbytes
16 Mbytes
—
—
—
57
Initial Bus Mode
—
8 bits
16 bits
8 bits
16 bits
—
—
—
Description
*1
On-Chip RAM
—
Enabled
Enabled
Enabled
Enabled
—
—
—
*2
*2
*2
*2
2
to