82C50A_06 Datasheet, PDF (21/25 Pages) Intersil Corporation – CMOS Asynchronous

82C50A
Timing Waveforms (Continued)
ADS
(2) tAS
A2, A1, A0
(4) tCS
CS2, CS1, CS0
CSOUT
DOSTR/DOSTR
(1)
tAW
VALID
VALID
(17)
tCSC†
(3) tAH
(5) tCH
(22) tWA†
(23)
tWCS†
(25)
tCSW†
(24)
tAW†
(12)
tDOW
ACTIVE
(14)
WC
(13)
tWC
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
(9)
(9)
tDD
tDD
(10)
tDDD
(11) tHZ
VALID DATA
† Applicable only when ADS is tied low.
FIGURE 7. READ CYCLE
21
ACTIVE
OR
ACTIVE
ACTIVE
OR
ACTIVE
FN2958.5
August 24, 2006