CS8900A
Crystal LAN™ ISA Ethernet Controller
SWITCHING CHARACTERISTICS (Continued)
Parameter
16-Bit Memory Write
Symbol
Min
Typ
Max
Unit
Address, SBHE, CHIPSEL valid to MEMCS16 low
Address, SBHE, CHIPSEL valid to MEMW low
MEMW pulse width
tMEMW1
tMEMW2
tMEMW3
tMEMW4
tMEMW5
tMEMW6
tMEMW7
-
20
110
-
-
-
-
-
-
-
-
30
-
ns
ns
ns
ns
ns
ns
ns
-
MEMW low to SD valid
40
-
SD hold after MEMW high
0
Address hold after MEMW inactive
MEMW inactive to active
0
-
35
-
10BASE-T Transmit
TXD Pair Jitter into 100 Ω Load
TXD Pair Return to ≤ 50 mV after Last Positive Transition
TXD Pair Positive Hold Time at End of Packet
tTTX1
tTTX2
tTTX3
-
-
-
-
-
8
4.5
-
ns
µs
ns
250
DIRECTION:
IN or OUT of chip
SA [19:0],
SBHE,
Valid Address
IN
CHIPSEL
t
t
MEMW1
MEMW6
MEMCS16
MEMW
OUT
t
t
t
MEMW2
MEMW7
t
MEMW3
IN
IN
MEMW5
t
MEMW4
SD [15:0]
Valid Data In
16-Bit Memory Write
t
TTX2
TXD±
t
t
TTX3
TTX1
10BASE-T Transmit
CIRRUS LOGIC PRODUCT DATA SHEET
116
DS271PP3
CIRRUS [ CIRRUS LOGIC ]
