T89C51SND1-ROTIL datasheet(40/60 Pages) ATMEL

Teilenummer	T89C51SND1-ROTIL

Bauteilbeschribung	Single Chip Microcontroller with MP3 Decoder and Man Machine Interface

PDF	60 Pages

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Hersteller	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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40 / 60 page

T8xC51SND1

Rev. D – 15-Nov-01

Table 46. External 8-bit Bus Cycle - Data Write AC Timings

VDD= 2.7 to 3.3 V, TA= -40 to +85

°C

12.4.3 Waveforms

Figure 16. External 8-bit Bus Cycle - Data Read Waveforms

Figure 17. External 8-bit Bus Cycle - Data Write Waveforms

Symbol

Parameter

Variable Clock

Standard Mode

Variable Clock

X2 Mode

Unit

Min

Max

Min

Max

CLCL

Clock Period

LHLL

ALE Pulse Width

2·T

CLCL-15

AVLL

Address Valid to ALE Low

CLCL-20

0.5·T

CLCL-20

LLAX

Address hold after ALE

Low

CLCL-20

0.5·T

CLCL-20

TLLWL

ALE Low to WR# Low

3·TCLCL-30

1.5·TCLCL-30

TWLWH

WR# Pulse Width

6·TCLCL-25

3·TCLCL-25

TWHLH

WR# High to ALE High

TCLCL-20

TCLCL+20

0.5·TCLCL-20

0.5·TCLCL+20

AVWL

Address Valid to WR#

Low

4·T

CLCL-30

2·T

CLCL-30

QVWH

Data Valid to WR# High

7·T

CLCL-20

3.5·T

CLCL-20

WHQX

Data Hold after WR# High

CLCL-15

0.5·T

CLCL-15

AVDV

LLAX

RHDX

RHDZ

AVLL

TAVRL

RD#

ALE

TLHLL

TRLRH

Data In

A15:8

RLAZ

TLLRL

TRHLH

TRLDV

D7:0

A7:0

T89C51SND1-ROTIL Datenblatt(PDF) 40 Page - ATMEL Corporation

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