Renesas H8S/2319 series Hardware Manual page 101

Table 3-2 MCU Operating Mode Selection (Mask ROM, ROMless versions, H8S/2319 F-
ZTAT, and H8S/2319C F-ZTAT)
MCU
Operating
Mode MD2 MD1 MD0
1
1 *
0 0
2
2 *
1
2
3 *
3
4 *
1 0
3
5 *
6 1
7
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 in section 17.24, On-Board Programming Modes.
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 in section 17.15, On-Board
Programming Modes. Also see table 17-30 in section 17.15, On-Board Programming
Modes, for information on user program mode.
For boot mode in the H8S/2319C F-ZTAT, see table 17-52 in section 17.24, On-Board
Programming Modes. Also see table 17-52 in section 17.24, On-Board Programming
Modes, 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
only be used in modes 1 to 7. This means that the mode pins must be set to select one of these
modes.
CPU
Operating
Mode Description
1 — —
0
1
0 Advanced Expanded mode with
on-chip ROM disabled
1
0 Expanded mode with
on-chip ROM enabled
1 Single-chip mode
External Data Bus
On-Chip Initial
ROM Value
— —
Disabled 16 bits
8 bits
Enabled 8 bits
—
Rev. 5.00, 12/03, page 71 of 1088
Max.
Value
—
16 bits
16 bits
16 bits
—