82C55A_15 Просмотр технического описания (PDF) - Intersil

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производитель

82C55A_15

CMOS Programmable Peripheral Interface

Intersil 

82C55A

Timing Waveforms

RD

INPUT

CS, A1, A0

D7-D0

tIR (13)

tAR (1)

tRR (3)

tHR (14)

tRA (2)

tRD (4)

FIGURE 25. MODE 0 (BASIC INPUT)

tDF (5)

WR

D7-D0

CS, A1, A0

OUTPUT

STB

IBF

INTR

RD

INPUT FROM

PERIPHERAL

FN2969 Rev 11.00

Dec 8, 2015

tAW (7)

tWW (9)

tDW

(10)

tWD (11)

tWA (8)

tWS (12)

FIGURE 26. MODE 0 (BASIC OUTPUT)

tST (16)

tSIB

(23)

tSIT

(26)

tRIT

(25)

tPH

(18)

tPS (17)

FIGURE 27. MODE 1 (STROBED INPUT)

tRIB (24)

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