CS8904
Crystal LAN™ Quad Ethernet Transceiver
Mode
Selected
Mode 1
MODE2 MODE1 MODE0
Controller Compatibility
Advanced Micro Devices AM7990, Motorola 68EN360, or
compatible controllers
Pin
Pin
Pin
1
0
0
Intel 82586, Intel 82596, or compatible controllers
Fujitsu MB86950, Fujitsu MB86960, or compatible controllers
National Semiconductor 8390, Texas Instruments TMS380C26, or
compatible controllers
Mode 2
Mode 3
Mode 4
1
1
1
0
1
1
1
0
1
Seeq 8005 or compatible controller
Reserved; Operation Undefined
Reserved; Operation Undefined
Reserved; Operation Undefined
Mode 5
0
0
0
0
1
1
0
0
1
0
1
0
Table 1. Mode Selection Summary
Parameter
Mode Bits (MODE2, MODE1, MODE0)
Controller Compatibility
Mode 1
1 0 0
AMD
Motorola
Rising
High
Mode 2
1 0 1
Intel
Mode 3
1 1 0
Fujitsu
Mode 4
1 1 1
National
TI
Rising
High
Mode 5
0 1 1
SEEQ
Edge of TxCLK where TxDATA is sampled
Polarity of Active TxENBL
Falling
Low
Falling
High
Rising
High
Polarity of Active LOOP
High
Low
High
High
High
Polarity of Active COLL
High
Low
Low
High
High
Edge of RxCLK where RxDATA is clocked.
Polarity of Active CD
Rising
High
Falling
Low
Falling
High
Rising
High
Rising
High
Level of RxDATA when CD is deasserted
RxCLK after CD is deasserted
High
5 cycles
High
5 cycles
Low
Continuous
Low
5 cycles
Low
Continuous
Table 2. Mode Operation Comparison
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
DS191PP2
11
CIRRUS [ CIRRUS LOGIC ]
