7721 datasheet(562/577 Pages) RENESAS

Part #	7721

Description	16-BIT SINGLE-CHIP MICROCOMPUTER

PDF	577 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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562 / 577 page

7721 Group User’s Manual

17–99

Appendix 11. Electrical characteristics

APPENDIX

tw(EL)

tsu(DRQ- 1)

Address

Data

Ad-

dress

tw(DRQ)

td( 1-STi)

td( 1-DAK)

td(AL-E)

th(E-AL)

td(AM-E)

th(E-AM)

td(ALE-E)

tw(ALE)

td(BHE-E)

td(BLE-E)

td(R/W-E)

td(AH-E)

th(E-BHE)

th(E-BLE)

td( 1-DAK)

td( 1-STi)

At DMA transfer

•Cycle-steal transfer timing (External source DMAREQi)

BHE output

ALE output

R/W output

ST0

A0–A7 output

A8/D8–A15/D15 output

(BYTE = “L”)

A8/D8–A15/D15 output

(BYTE = “H”)

A16/D0–A23/D7 output

BLE output

Test conditions

•Vcc = 5 V ± 10 %

•Output timing voltage : VOL = 0.8 V, VOH = 2.0 V

•D0–D15 input : VIL = 0.8 V, VIH = 2.5 V

•DMAREQi input : VIL = 0.8 V, VIH = 2.5 V

DMAREQi

DMAACKi

Address

Data

Address

Ad-

dress

Ad-

dress

Ad-

dress

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