SH7018 datasheet(333/431 Pages) RENESAS

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SH7018 Datasheet(PDF) 333 Page - Renesas Technology Corp

Part #	SH7018

Description	SuperH??RISC engine

PDF	431 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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333 / 431 page

317

16.2.2

Mode Transitions

When the mode pins and the FWP pin are set in the reset state and a reset-start is executed, the

SH7018 enters one of the operating modes shown in figure 16.2. In user mode, flash memory can

be read but not programmed or erased.

Flash memory can be programmed and erased in boot mode, user program mode, and programmer

mode.

Boot mode

On-board programming mode

User

program mode

User mode

Reset state

Programmer

mode

RES = 0

FWP = 0

FWP = 1

Notes: Only make a transition between user mode and user program mode when the CPU is

not accessing the flash memory.

1. RAM emulation possible

2. MD0 = 1, MD1 = 0, MD2 = 1, MD3 = 1

RES = 0

MD1 = 0,

FWP = 0

RES = 0

MD1 = 1,

FWP = 1

MD1 = 1,

FWP = 0

Figure 16.2 Flash Memory Mode Transitions

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