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CS8900A Datasheet(PDF) 115 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) 115 Page - Cirrus Logic

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 115 / 128 page
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DS271PP3
115
CS8900A
Crystal LAN™ ISA Ethernet Controller
CIRRUS LOGIC PRODUCT DATA SHEET
SWITCHING CHARACTERISTICS (Continued)
Parameter
Symbol
Min
Typ
Max
Unit
DMA Read
DMACKx active to IOR active
tDMAR1
60
-
-
ns
AEN active to IOR active
tDMAR2
10
-
-
ns
IOR active to Data Valid
tDMAR3
--
135
ns
IOR inactive to SD 3-state
tDMAR4
-30
-
ns
IOR n-1 high to DMARQx inactive
tDMAR5
-
-
20
ns
DMACKx, AEN hold after IOR high
tDMAR6
20
ns
16-Bit I/O Write
Address, AEN, SBHE valid to IOCS16 low
tIOW1
-
-
35
ns
Address, AEN, SBHE valid to IOW low
tIOW2
20
-
-
ns
IOW pulse width
tIOW3
110
-
-
ns
SD hold after IOW high
tIOW4
0-
-
ns
IOW low to SD valid
tIOW5
-
-
10
ns
IOW inactive to active
tIOW6
35
-
-
ns
Address hold after IOW high
tIOW7
0-
-
ns
DIRECTION:
IN or OUT of chip
SD[15:0]
OUT
IOR
DMARQx
OUT
IN
DMACKx
IN
AEN
IN
t
DMA1
IOR
n
IOR
n-1
t
DMA2
Valid
Data
Valid
Data
Valid
Data
t
DMA3
t
DMA5
t
DMA4
t
DMA6
16-Bit DMA Read
16-Bit I/O Write
SA [15:0],
AEN, SBHE
Valid Address
IOCS16
IN
DIRECTION:
IN or OUT of chip
IOW
SD [15:0]
Valid Data In
OUT
IN
IN
t
IOW1
tIOW2
tIOW3
tIOW4
tIOW5
tIOW6
tIOW7



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