H8SSLASH2224 datasheet(836/1071 Pages) RENESAS

Il numero della parte	H8S/2224

Spiegazioni elettronici	16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

PDF	1071 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

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Section 20 Flash Memory (F-ZTAT Version)

Rev. 5.00 Aug 08, 2006 page 750 of 982

REJ09B0054-0500

FWE

OSC1

min 0ms

MDS

RESW

MD2 to MD0

RES

SWE1 bit

Mode

change*1

Boot

mode

Mode

change*

User

mode

User program mode

User

mode

User program

mode

SWE1 set

SWE1

cleared

When entering boot mode or making a transition from boot mode to another mode, mode switching must be

carried out by means of

RES input

When making a transition from boot mode to another mode, a mode programming setup time tMDS (min) of 200

ns is necessary with respect to

RES clearance timing.

See sections

27.2.6, 27.3.6, 27.4.6, 27.5.6 and 27.6.6, Flash Memory Characteristics.

Wait time: 100

µs.

Period during which flash memory access is prohibited

(tsswe: Wait time after setting SWE1 bit)*

Period during which flash memory can be programmed

(Execution of program in flash memory prohibited, and data reads other than verify operations prohibited)

Notes:

Figure 20.16 Mode Transition Timing

(Example: Boot Mode → User Mode ↔ User Program Mode)

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