T80C251TB 查看數據表（PDF） - Intel

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T80C251TB

HIGH-PERFORMANCE CHMOS MICROCONTROLLER

Intel 

Contents

FIGURES

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TABLES

Table 1.

Table 2.

Table 3.

Table 4.

Table 5.

Table 6.

Table 7.

Table 8.

Table 9.

Table 10.

Table 11.

Table 12.

Table 13.

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Table 16.

8xC251TB/TQ Block Diagram.................................................................................................... 1

The 8xC251TB/TQ Family Nomenclature .................................................................................. 2

8xC251TB/TQ 44-pin PLCC Package........................................................................................ 4

8xC251TB/TQ 40-pin PDIP Packages ....................................................................................... 5

External Bus Cycle: Code Fetch (Nonpage Mode) .................................................................. 18

External Bus Cycle: Data Read (Nonpage Mode) ................................................................... 19

External Bus Cycle: Data Write (Nonpage Mode).................................................................... 20

External Bus Cycle: Code Fetch (Page Mode) ........................................................................ 21

External Bus Cycle: Data Read (Page Mode).......................................................................... 22

External Bus Cycle: Data Write (Page Mode) .......................................................................... 23

External Bus Cycle: Code Fetch/Data Read (Nonpage Mode) ................................................ 24

External Bus Cycle: Data Write (Nonpage Mode).................................................................... 25

External Bus Cycle: Code Fetch/Data Read (Page Mode) ...................................................... 26

External Bus Cycle: Data Write (Page Mode) .......................................................................... 27

Serial Port Waveform — Shift Register Mode .......................................................................... 28

External Clock Drive Waveforms ............................................................................................. 29

AC Testing Input, Output Waveforms....................................................................................... 29

Float Waveforms ...................................................................................................................... 30

Description of Product Nomenclature ........................................................................................2

Proliferation Options .................................................................................................................. 3

Package Information .................................................................................................................. 3

8xC251TB/TQ Pin Assignment .................................................................................................. 6

8xC251TB/TQ PLCC/DIP Pin Assignments Arranged by Functional Category ......................... 7

Signal Descriptions ....................................................................................................................8

Memory Signal Selections (RD1:0) ..........................................................................................10

8xC251TB/TQ Address Map .................................................................................................... 11

DC Characteristics at VCC = 4.5 – 5.5 V ..................................................................................12

AC Timing Symbol Definitions ..................................................................................................14

AC Characteristics ................................................................................................................... 14

Real-time Wait Timing Symbol Definitions ...............................................................................24

Real-Time Wait AC Timing ....................................................................................................... 27

Serial Port Timing — Shift Register Mode ...............................................................................28

External Clock Drive ................................................................................................................ 29

Thermal Characteristics ........................................................................................................... 30

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