CS8900A
Crystal LAN™ ISA 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
Symbol
Min
Typ
Max
Unit
tIOR1
tIOR2
tIOR3
tIOR4
tIOR5
tIOR6
-
10
-
-
-
35
ns
ns
ns
ns
ns
ns
-
-
135
Address, AEN, SBHE hold after IOR inactive
IOR inactive to active
0
-
-
-
-
35
-
-
IOR inactive to SD 3-state
30
16-Bit I/O Read, With IOCHRDY
IOR active to IORCHRDY inactive
IOCHRDY low pulse width
tIOR7
tIOR8
tIOR9
-
125
-
30
-
-
175
0
ns
ns
ns
IOCHRDY active to SD valid
-
DIRECTION:
IN or OUT of chip
SA [15:0],
AEN, SBHE
Valid Address
IN
t
IOR1
t
IOR4
IOCS16
IOR
OUT
t
IOR5
t
IOR2
IN
t
IOR6
t
IOR3
OUT
SD [15:0]
Valid Data
16-Bit I/O Read, IOCHRDY not used
DIRECTION:
IN or OUT of chip
SA [15:0],
AEN, SBHE
Valid Address
IN
IOCS16
IOR
OUT
IN
t
IOR7
IOCHRDY
OUT
OUT
t
IOR8
SD [15:0]
Valid Data
t
IOR9
16-Bit I/O Read, with IOCHRDY
CIRRUS LOGIC PRODUCT DATA SHEET
DS271PP3
113
CIRRUS [ CIRRUS LOGIC ]
