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

WCLK

ALE

WR#

WAIT#

P0

P2

State 1

State 2

State 3

State 4

TWLYX max

TWLYX min

TWLYV

TCLYV

TCLYX min

TCLYX max

WR# stretched

A0-A7

D0-D7

A8-A15

stretched

stretched

Figure 14. External Bus Cycle: Data Write (Nonpage Mode)

A5002-01

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

P2

A8-A15

D0-D7

stretched

A8-A15

P0

A0-A7

stretched

A0-A7

Figure 15. External Bus Cycle: Code Fetch/Data Read (Page Mode)

A5001-01

PRELIMINARY

29

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