H8SLASH3028F datasheet(603/923 Pages) RENESAS

603 / 923 page

Rev. 2.00, 09/03, page 573 of 890

Section 18 ROM

(H8/3028F-ZTAT, Mask ROM Version)

18.1

Flash Memory Version Overview

The H8/3028F-ZTAT has 384 kbytes of on-chip flash memory. The flash memory is connected to

the CPU by a 16-bit data bus. The CPU accesses both byte data and word data in two states,

enabling rapid data transfer.

The on-chip ROM is enabled and disabled by setting the mode pins (MD2 to MD0) as shown in

table 18.1.

The on-chip flash memory product (H8/3028F-ZTAT) can be erased and programmed on-board,

as well as with a special-purpose PROM programmer.

Table 18.1 Operating Modes and ROM

Mode Pins

Mode

MD2

MD1

MD0

On-Chip ROM

Mode 1 (expanded 1-Mbyte mode with on-chip ROM

disabled)

001Disabled (external

address area)

Mode 2 (expanded 1-Mbyte mode with on-chip ROM

disabled)

010

Mode 3 (expanded 16-Mbyte mode with on-chip ROM

disabled)

011

Mode 4 (expanded 16-Mbyte mode with on-chip ROM

disabled)

100

Mode 5 (expanded 16-Mbyte mode with on-chip ROM

enabled)

101Enabled

Mode 6 (single-chip normal mode)

Mode 7 (single-chip advanced mode)

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