Section 3 Mcu Operating Modes; Operating Mode Selection; Table 3.1 Mcu Operating Mode Selection - Hitachi H8S/2215 Series Hardware Manual

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
MCU
Operating
Mode MD2 MD1 MD0
4 1 0
5 1 0
6 1 1
7* 1 1
Note : The USB cannot be used in mode 7.
*

Section 3 MCU Operating Modes

CPU Operating
Mode
0 Advanced mode
1 Advanced mode
0 Advanced mode
1 Advanced mode
On-chip
Description ROM
On-chip ROM Disabled
disabled, extended
mode
On-chip ROM Disabled
disabled, extended
mode
On-chip ROM Enabled
enabled, extended
mode
Singlechip mode Enabled
External Data Bus
Maximum
Initial Value Value
16 bits 16 bits
8 bits 16 bits
8 bits 16 bits
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Rev. 3.0, 10/02, page 55 of 686