H8SLASH3021 datasheet(148/712 Pages) RENESAS

No. de pieza	H8/3021

Descripción Electrónicos	16-Bit Single-Chip Microcomputer

PDF	712 Pages

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Fabricante Electrónico	RENESAS [Renesas Technology Corp]

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6. Bus Controller

Rev.2.00 Mar. 22, 2007 Page 124 of 684

REJ09B0352-0200

Example of Wait State Control Settings: A reset initializes ASTCR and WCER to H'FF and

WCR to H'F3, selecting programmable wait mode and three wait states for all areas. Software can

select other wait modes for individual areas by modifying the ASTCR, WCER, and WCR settings.

Figure 6.9 shows an example of wait mode settings.

76543210

—

Bit:

ASTCR H'0F:

WCER H'33:

WCR H'F3:

Area 0

Area 1

Area 2

Area 3

Area 4

Area 5

Area 6

Area 7

3-state-access area,

programmable wait mode

3-state-access area,

programmable wait mode

3-state-access area,

pin wait mode 0

3-state-access area,

pin wait mode 0

2-state-access area,

no wait states inserted

2-state-access area,

no wait states inserted

2-state-access area,

no wait states inserted

2-state-access area,

no wait states inserted

Note: Wait states cannot be inserted in areas designated for two-state access by ASTCR.

Figure 6.9 Wait Mode Settings (Example)

H8/3021 Datasheet(PDF) 148 Page - Renesas Technology Corp