Cirrus Logic CS8900A - Manual (Page 130)

130 DS271F5
CS8900A
Crystal LAN™ Ethernet Controller
CIRRUS LOGIC PRODUCT DATASHEET
SWITCHING CHARACTERISTICS
(Continued)
Parameter Symbol Min Typ Max Unit
AUI Transmit
DO Pair Rise and Fall Times t
ATX1
- 4 - ns
DO Pair Jitter at Bit Cell Center t
ATX2
- 0.4 - ns
DO Pair Positive Hold Time at Start of Idle t
ATX3
- 250 - ns
DO Pair Return to
≤ 40 mVp after Last Positive Transition
t
ATX4
- 6.0 - µs
AUI Receive
DI Pair Rise and Fall Time t
ARX1
- 8 - ns
Allowable Bit Cell Center and Boundary Jitter in Data t
ARX2
- ±14 - ns
Carrier Sense Assertion Delay t
ARX3
- 240 - ns
Invalid Preamble Bits after Carrier Sense Asserts t
ARX4
- 2 - bits
Carrier Sense Deassertion Delay t
ARX5
- 200 - ns
AUI Collision
CI Pair Cycle Time t
ACL1
- 100 - ns
CI Pair Rise and Fall Times t
ACL2
- 8 - ns
CI Pair Return to Zero from Last Positive Transition t
ACL3
- 200 - ns
Collision Assertion Delay t
ACL4
- 125 - ns
Collision Deassertion Delay t
ACL5
- 225 - ns
DO±
tATX1 tATX1 tATX2
tATX4
tATX3
1 0 0 0
Figure 59. AUI Transmit
DI±
tARX1 tARX2
1 0 1 0
tARX3 tARX4 tARX5
tARX1
Carrier Sense (Internal)
Figure 60. AUI Receive
t ACL1
CI±
t
ACL4
t ACL5
Collision (Internal)
t ACL2
t ACL2
t
ACL3
Figure 61. AUI Collision