P80C251TP View Datasheet(PDF) - Intel

Part Name

Description

Manufacturer

P80C251TP

HIGH-PERFORMANCE CHMOS MICROCONTROLLER

Intel 

8xC251TA/TB/TP/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER

6.3.3 Definition of Real-Time Wait Symbols

Table 12. Real-time Wait Timing Symbol Definitions

Signals

A Address

D Data

C WCLK

Y WAIT#

W WR#

R RD#/PSEN#

Conditions

L Low

X Hold

V Setup

6.3.4 External Bus Cycles, Real-Time Wait States

WCLK

ALE

RD#/PSEN#

WAIT#

State 1

State 2

State 3

State 1 (next cycle)

TRLYX max

TRLYX min

TRLYV

TCLYV

TCLYX min

TCLYX max

RD#/PSEN# stretched

P0

A7:0

D7:0

stretched

A7:0

P2

A15:8

stretched

A15:8

A5000-02

Figure 11. External Bus Cycle: Code Fetch/Data Read (Nonpage Mode)

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