CS8900A-CQZ View Datasheet(PDF) - Cirrus Logic
Part Name
Description
Manufacturer
CS8900A-CQZ Datasheet PDF : 138 Pages
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CS8900A
Crystal LAN™ Ethernet Controller
SWITCHING CHARACTERISTICS (Continued)
Parameter
16-Bit Memory Read, IOCHRDY Not Used
SA [19:0], SBHE, CHIPSEL, active to MEMCS16 low
Address, SBHE, CHIPSEL active to MEMR active
MEMR low to SD valid
Address, SBHE, CHIPSEL hold after MEMR inactive
MEMR inactive to SD 3-state
MEMR inactive to active
16-Bit Memory Read, With IOCHRDY
MEMR low to IOCHRDY inactive
IOCHRDY low pulse width
IOCHRDY active to SD valid
Symbol
tMEMR1
tMEMR2
tMEMR3
tMEMR4
tMEMR5
tMEMR6
tMEMR7
tMEMR8
tMEMR9
SA [19:0],
SBHE,
C H IP S E L
MEMCS16
MEMR
SD [15:0]
tMEMR1
Valid Address
tMEMR2
tMEMR4
tMEMR6
tMEMR3
tMEMR5
Valid Data
Min
Typ
-
-
10
-
-
-
0
-
-
30
35
-
-
35
125
-
-
-
D IR E C T IO N :
IN or OUT of chip
IN
OUT
IN
OUT
Figure 36. 16-Bit Memory Read, IOCHRDY not used
Max
30
-
135
-
-
-
-
175
0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
DS271F4
SA [19:0],
SBHE,
C H IP S E L
MEMCS16
Valid Address
DIR ECTION:
IN or OUT of chip
IN
OUT
MEMR
IO C H R D Y
SD [15:0]
t MEMR7
t MEMR8
Valid Data
IN
OUT
OUT
t MEMR9
Figure 37. 16-Bit Memory Read, with IOCHRDY
CIRRUS LOGIC PRODUCT DATASHEET
115
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