82C50A Datasheet, PDF (20/21 Pages) Intersil Corporation – CMOS Asynchronous Communications Element

82C50A
Timing Waveforms (Continued)
(1)
tAW
ADS
(2) tAS
A2, A1, A0
(4) tCS
CS2, CS1, CS0
CSOUT
VALID
VALID
(17)
tCSC†
(3) tAH
(5) tCH
(22) tWA†
(23)
tWCS†
(25)
tCSW†
(24)
tAW†
(12)
tDOW
(14)
WC
(13)
tWC
DOSTR/DOSTR
ACTIVE
DISTR/DISTR
DATA
D0-D7
† Applicable only when ADS is tied low.
(15) tDS
(16) tDH
VALID DATA
FIGURE 6. WRITE CYCLE
ADS
(2) tAS
A2, A1, A0
(4) tCS
CS2, CS1, CS0
CSOUT
DISTR/DISTR
(1)
tAW
VALID
VALID
(17)
tCSC†
(3) tAH
(5) tCH
(18) tRA†
(19)
tRCS†
(21)
tCSR†
(20)
tAR†
(6)
tDIW
ACTIVE
(8)
RC
(7)
tRC
DOSTR/DOSTR
DD/S
DATA
D0-D7
† Applicable only when ADS is tied low.
(9)
(9)
tDD
tDD
(10)
tDDD
(11) tHZ
VALID DATA
FIGURE 7. READ CYCLE
ACTIVE
OR
ACTIVE
ACTIVE
OR
ACTIVE
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