MSC1211 datasheet(10/105 Pages) TI

Teilenummer	MSC1211

Bauteilbeschribung	Precision Analog-to-Digital Converter (ADC) and Digital-to-Analog Converters (DACs) with 8051 Microcontroller and Flash Memory

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Hersteller	TI [Texas Instruments]

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MSC1211, MSC1212

MSC1213,MSC1214

SBAS323D − JUNE 2004 − REVISED SEPTEMBER 2005

www.ti.com

EXPLANATION OF THE AC SYMBOLS

Each Timing Symbol has five characters. The first character is always ’t’ (= time). The other characters, depending on their positions, indicate the name of a signal

or the logical status of that signal. The designators are:

Address

Clock

Input Data

Logic Level High

Instruction (program memory contents)

Logic Level Low, or ALE

PSEN

Output Data

RD Signal

Time

Valid

WR Signal

No Longer a Valid Logic Level

Float

Examples:

(1) tAVLL = Time for address valid to ALE Low.

(2) tLLPL = Time for ALE Low to PSEN Low.

LHLL

AVLL

LLPL

PLPH

LLIV

LLAX

PLAZ

PXIZ

PXIX

AVIV

PLIV

A0−A7

A8−A15

INSTR IN

ALE

PSEN

PORT 0

PORT 2

Figure 1. External Program Memory Read Cycle

AVLL

ALE

PSEN

PORT 0

PORT 2

A0−A7

from RI or DPL

DATA IN

A0−A7 from PCL

INSTR IN

P2.0−P2.7 or A8−A15 from DPH

A8−A15 from PCH

AVDV

LLDV

WHLH

RLRH

LLWL

LLAX

RLAZ

RHDX

RLDV

AVWL

RHDZ

Figure 2. External Data Memory Read Cycle

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