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CS82C55A Fiches technique(PDF) 21 Page - Intersil Corporation

No de pièce CS82C55A
Description  CMOS Programmable Peripheral Interface
PDF  29 Pages
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Fabricant  INTERSIL [Intersil Corporation]
Site Internet  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

CS82C55A Fiches technique(HTML) 21 Page - Intersil Corporation

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21
FN2969.10
November 16, 2006
FIGURE 28. MODE 1 (STROBED OUTPUT)
FIGURE 29. MODE 2 (BIDIRECTIONAL)
NOTE:
Any sequence where WR occurs before ACK and STB occurs before RD is permissible. (INTR = IBF
• MASK • STB • RD + OBF • MASK
• ACK • WR)
Timing Waveforms (Continued)
tWOB (21)
tWB (12)
tAK (15)
tAIT (27)
tAOB (22)
tWIT
OBF
WR
INTR
ACK
OUTPUT
(28)
tWOB
tAOB
tAK
tAD (19)
tKD
tPH (18)
tPS (17)
tSIB
tST
OBF
WR
INTR
ACK
IBF
STB
PERIPHERAL
BUS
RD
tRIB (24)
DATA FROM
PERIPHERAL TO 82C55A
DATA FROM
82C55A TO PERIPHERAL
DATA FROM
82C55A TO CPU
DATA FROM
CPU TO 82C55A
(21)
(22)
(15)
(16)
(20)
(23)
(NOTE)
(NOTE)
82C55A



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