80C251SB16 Ver la hoja de datos (PDF) - Intel

Número de pieza

componentes Descripción

Fabricante

80C251SB16

HIGH-PERFORMANCE CHMOS MICROCONTROLLER

Intel 

8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER

5.3.3 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

5.3.4 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

A0-A7

D0-D7

stretched

A0-A7

P2

A8-A15

stretched

A8-A15

Figure 13. External Bus Cycle: Code Fetch/Data Read (Nonpage Mode)

A5000-01

28

PRELIMINARY

Share Link: