Renesas H8S/2378F Informações Técnicas descarregar pdf (Página 10)

2. H8S/2378F (H8S Family)

2.1 Flash Memory Configuration

The flash memory of the H8S/2378F has two types of memory MATs: User MAT (user area) and user boot MAT (user

boot area). In addition, it has an area for storing a flash memory programming and erasing control program that is called

a boot MAT (boot area). This application note calls them the user area, user boot area, and boot area, respectively. The

flash memory configuration is shown in

Table 2-1.

Table 2-1 Flash Memory Configuration

Area Type Size Block(s)

User area Flash memory 512 Kbytes 16 blocks

Eight 4-Kbyte blocks

One 32-Kbyte block

Seven 64-Kbyte blocks

User boot area Flash memory 8 Kbytes 1 block

Boot area Control program - -

2.2 Operating Modes

The H8S/2378 has six operating modes (modes 1 to 5 and 7). The operating mode is selected by the setting the mode

pins (MD2 to MD0).

Modes 1, 2, and 4 are externally expanded modes in which the CPU can access external memory and peripheral devices.

In an externally expanded mode, each area in the external address space can be switched between 8- or 16-bit address

space by the bus controller after the start of the execution of a program. If any one of the areas is set to 16-bit address

space, the 16-bit bus mode is used. When all areas are set to 8-bit address space, the 8-bit bus mode is used.

Mode 7 is a single-chip activation externally expanded mode in which the CPU can switch to access external memory

and peripheral devices at the start of the execution of a program.

Mode 3 is a boot mode and mode 5 is a user boot mode, both in which flash memory can be programmed or erased.

Do not change the settings of pins MD2 to MD0 during LSI operation.

For details, refer to the Hardware Manual.

Table 2-2 MCU Operating Modes

External Data Bus MCU

Operating

Mode

MD2 MD1 MD0 CPU Operating

Mode

Description On-Chip

ROM

Initial

Value

Maximum

Value

1 0 0 1 Advanced Expanded mode with

on-chip ROM disabled

Disabled 16 bits 16 bits

2 0 1 0 Advanced Expanded mode with

on-chip ROM disabled

Disabled 8 bits 16 bits

3 0 1 1 Advanced Boot mode Enabled - 16 bits

4 1 0 0 Advanced Expanded mode with

on-chip ROM enabled

Enabled 8 bits 16 bits

5 1 0 1 Advanced User boot mode Enabled - 16 bits

7 1 1 1 Advanced Single-chip mode Enabled - 16 bits

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 108 109

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