SH7721 datasheet(366/1524 Pages) RENESAS

Part #	SH7721

Description	Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

PDF	1524 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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366 / 1524 page

Section 9

Bus State Controller (BSC)

Rev. 3.00 Jan. 18, 2008 Page 304 of 1458

REJ09B0033-0300

Bit

Bit Name

Initial

Value

R/W

Description

SW1

SW0

R/W

Number of Delay Cycles from Address,

CSn Assertion to

RD, WEn (BEn) Assertion-

Specify the number of delay cycles from address and

CSn

assertion to

RD and WEn (BEn) assertion.

00: 0.5 cycle

01: 1.5 cycles

10: 2.5 cycles

11: 3.5 cycles

WR3

WR2

WR1

WR0

R/W

Number of Access Wait Cycles

Specify the number of wait cycles that are necessary for

read or write access.

0000: 0 cycle

0001: 1 cycle

0010: 2 cycles

0011: 3 cycles

0100: 4 cycles

0101: 5 cycles

0110: 6 cycles

0111: 8 cycles

1000: 10 cycles

1001: 12 cycles

1010: 14 cycles

1011: 18 cycles

1100: 24 cycles

1101: Reserved (setting prohibited)

1110: Reserved (setting prohibited)

1111: Reserved (setting prohibited)

R/W

External Wait Mask Specification

Specifies whether or not the external wait input is valid.

The specification by this bit is valid even when the number

of access wait cycles is 0.

0: External wait is valid

1: External wait is ignored

SH7721 Datasheet(PDF) 366 Page - Renesas Technology Corp

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