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CS8900A Datasheet(PDF) 114 Page - Cirrus Logic

Part # CS8900A
Description  Crystal LAN ??ISA Ethernet Controller
PDF  128 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS8900A Datasheet(HTML) 114 Page - Cirrus Logic

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114
DS271PP3
CS8900A
Crystal LAN™ ISA Ethernet Controller
CIRRUS LOGIC PRODUCT DATA SHEET
SWITCHING CHARACTERISTICS (Continued)
Parameter
Symbol
Min
Typ
Max
Unit
16-Bit Memory Read, IOCHRDY Not Used
SA [19:0], SBHE, CHIPSEL, active to MEMCS16 low
tMEMR1
-
-
30
ns
Address, SBHE, CHIPSEL active to MEMR active
tMEMR2
10
-
-
ns
MEMR low to SD valid
tMEMR3
--
135
ns
Address, SBHE, CHIPSEL hold after MEMR inactive
tMEMR4
0-
-
ns
MEMR inactive to SD 3-state
tMEMR5
-30
-
ns
MEMR inactive to active
tMEMR6
35
-
-
ns
16-Bit Memory Read, With IOCHRDY
MEMR low to IOCHRDY inactive
tMEMR7
-35
-
ns
IOCHRDY low pulse width
tMEMR8
125
-
175
ns
IOCHRDY active to SD valid
tMEMR9
--
0
ns
SA [19:0],
SBHE,
CHIPSEL
Valid Address
MEMCS16
IN
DIRECTION:
IN or OUT of chip
MEMR
SD [15:0]
Valid Data
OUT
IN
OUT
tMEMR1
tMEMR2
tMEMR3
tMEMR4
tMEMR5
tMEMR6
16-Bit Memory Read, IOCHRDY not used
SA [19:0],
SBHE,
CHIPSEL
Valid Address
MEMCS16
IN
DIRECTION:
IN or OUT of chip
MEMR
SD [15:0]
Valid Data
OUT
IN
OUT
IOCHRDY
OUT
t MEMR7
t MEMR8
t MEMR9
16-Bit Memory Read, with IOCHRDY



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