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
7.4 SWITCHING CHARACTERISTICS (TA = 25 °C; VDD = 5.0 V or VDD = 3.3V)
Parameter
16-Bit I/O Read, IOCHRDY Not Used
Address, AEN, SBHE active to IOCS16 low
Address, AEN, SBHE active to IOR active
IOR low to SD valid
Address, AEN, SBHE hold after IOR inactive
IOR inactive to active
IOR inactive to SD 3-state
16-Bit I/O Read, With IOCHRDY
IOR active to IORCHRDY inactive
IOCHRDY low pulse width
IOCHRDY active to SD valid
Symbol Min
Typ
Max
tIOR1
-
tIOR2
10
tIOR3
-
tIOR4
0
tIOR5
35
tIOR6
-
-
35
-
-
-
135
-
-
-
-
30
-
tIOR7
-
30
-
tIOR8
125
-
175
tIOR9
-
-
0
SA [15:0],
AEN, SBHE
IO C S 1 6
Valid Address
t IOR1
t IOR4
D IRECTION :
IN or OUT of chip
IN
OUT
IO R
SD [15:0]
t IOR2
t IOR5
t IOR3
t IOR6
Valid Data
IN
OUT
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
SA [15:0],
AEN, SBHE
IO C S 1 6
Figure 34. 16-Bit I/O Read, IOCHRDY not used
Valid Address
D IR E C T IO N :
IN or OUT of chip
IN
OUT
IO R
IO CHRDY
SD [15:0]
t IOR7
t IOR8
Valid Data
IN
OUT
OUT
t IOR9
Figure 35. 16-Bit I/O Read, with IOCHRDY
CIRRUS LOGIC PRODUCT DATASHEET
114
DS271F4
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