Rev. 3.0, 10/02, page 55 of 686
Section 3 MCU Operating Modes
3.1
Operating Mode Selection
This LSI supports four operating modes (modes 4 to 7). 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 (MD2 to MD0) as show in table 3.1. Do not change the mode pin settings during
operation.
Table 3.1
MCU Operating Mode Selection
External Data Bus
MCU
Operating
Mode
MD2 MD1 MD0
CPU Operating
Mode
Description
On-chip
ROM
Initial Value
Maximum
Value
4
1
0
0
Advanced mode
On-chip ROM
disabled, extended
mode
Disabled
16 bits
16 bits
5
1
0
1
Advanced mode
On-chip ROM
disabled, extended
mode
Disabled
8 bits
16 bits
6
1
1
0
Advanced mode
On-chip ROM
enabled, extended
mode
Enabled
8 bits
16 bits
7
*
1
1
1
Advanced mode
Singlechip mode
Enabled
–
–
Note :
*
The USB cannot be used in mode 7.
Summary of Contents for H8S/2215 Series
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