HD64F2328VTE25 Datasheet, PDF (107/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 3 MCU Operating Modes
Table 3.2 MCU Operating Mode Selection (Mask ROM, ROMless versions, H8S/2319 F-
ZTAT, and H8S/2319C F-ZTAT)
MCU
CPU
Operating
Operating
Mode
MD2 MD1 MD0 Mode Description
1^*1
001—
—
2^*2
10
3^*2
1
4^*3
1 0 0 Advanced Expanded mode with
5^*3
1
on-chip ROM disabled
External Data Bus
On-Chip Initial
ROM Value
Max.
Value
—
—
—
Disabled 16 bits
8 bits
16 bits
16 bits
6
10
Expanded mode with Enabled 8 bits
16 bits
on-chip ROM enabled
7
1
Single-chip mode
—
—
Notes: 1. User boot mode in the H8S/2319C F-ZTAT. For user boot mode in the H8S/2319C
F-ZTAT, see table 17.52.
2. Boot mode in the H8S/2319 F-ZTAT and H8S/2319C F-ZTAT.
For boot mode in the H8S/2319 F-ZTAT, see table 17.30. Also see table 17.30, for
information on user program mode.
For boot mode in the H8S/2319C F-ZTAT, see table 17.52. Also see table 17.52, for
information on user program mode.
3. Only modes 4 and 5 are provided in the ROMless versions.
The CPU's architecture allows for 4 Gbytes of address space, but the Mask ROM, ROMless
version, H8S/2319 F-ZTAT, and H8S/2319C F-ZTAT actually access a maximum of 16 Mbytes.
Modes 4 to 6 are externally expanded modes that allow access to external memory and peripheral
devices.
The external expansion modes allow switching between 8-bit and 16-bit bus modes. After
program execution starts, an 8-bit or 16-bit address space can be set for each area, depending on
the bus controller setting. If 16-bit access is selected for any one area, 16-bit bus mode is set; if 8-
bit access is selected for all areas, 8-bit bus mode is set. Note that the functions of each pin depend
on the operating mode.
The ROMless and mask ROM versions can only be used in modes 4 to 7. This means that the
mode pins must be set to select one of these modes. However, note that only mode 4 or 5 can be
set for the ROMless versions. The H8S/2319 F-ZTAT can only be used in modes 2 to 7. This
means that the mode pins must be set to select one of these modes. The H8S/2319C F-ZTAT can
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