CS8900A-CQZ データシートの表示（PDF） - Cirrus Logic
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CS8900A-CQZ Datasheet PDF : 138 Pages
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CS8900A
Crystal LAN™ Ethernet Controller
SWITCHING CHARACTERISTICS (Continued)
Parameter
DMA Read
DMACKx active to IOR active
AEN active to IOR active
IOR active to Data Valid
IOR inactive to SD 3-state
IOR n-1 high to DMARQx inactive
DMACKx, AEN hold after IOR high
16-Bit I/O Write
Address, AEN, SBHE valid to IOCS16 low
Address, AEN, SBHE valid to IOW low
IOW pulse width
SD hold after IOW high
IOW low to SD valid
IOW inactive to active
Address hold after IOW high
Symbol Min
tDMAR1
60
tDMAR2
10
tDMAR3
-
tDMAR4
-
tDMAR5
-
tDMAR6
20
tIOW1
-
tIOW2
20
tIOW3
110
tIOW4
0
tIOW5
-
tIOW6
35
tIOW7
0
DMARQx
DMACKx
AEN
IOR
SD[15:0]
tDMA1
tDMA5
tDMA6
tDMA3
tDMA2
IORn-1
Valid
Data
tDMA4
Valid
Data
IORn
Valid
Data
Figure 38. 16-Bit DMA Read
Typ
Max
-
-
-
-
-
135
30
-
-
20
-
35
-
-
-
-
-
-
-
10
-
-
-
-
DIRECTION:
IN or OUT of chip
OUT
IN
IN
IN
OUT
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
SA [15:0],
AEN, SBHE
IO C S 16
IO W
SD [15:0]
V alid A ddress
t IO W 1
tIO W 7
t IO W 2
tIOW 3
tIOW 6
tIO W 5
Valid Data In
tIO W 4
DIRECTION:
IN or OUT of chip
IN
OUT
IN
IN
Figure 39. 16-Bit I/O Write
CIRRUS LOGIC PRODUCT DATASHEET
116
DS271F4
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