ICS1894-40
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
PHYCEIVER
Register Map
Register Address
Register Name
Basic / Extended
Basic
0
Control
1
Status
Basic
2,3
PHY Identifier
Extended
Extended
Extended
Extended
Extended
Extended
Extended
Extended
4
Auto-Negotiation Advertisement
Auto-Negotiation Link Partner Ability
Auto-Negotiation Expansion
5
6
7
Auto-Negotiation Next Page Transmit
Auto-Negotiation Next Page Link Partner Ability
Reserved by IEEE
8
9 through 15
16 through 31
Vendor-Specific (IDT) Registers
Register Description
Bit
Definition
When Bit = 0
When Bit = 1
Access 2 SF2
Default3
Hex
Register 0h - Control
0.15
0.14
0.13
0.12
0.11
0.10
0.9
Reset
No effect
Disable Loopback mode Enable Loopback mode
10 Mbps operation 100 Mbps operation
Reset mode
RW
RW
RW
RW
RW
RW
RW
RW
RW
RO
RO
RO
RO
RO
RO
RO
SC
–
0
0
3
Loopback enable
Speed select1
–
1
Auto-Negotiation enable DisableAuto-Negotiation Enable Auto-Negotiation
–
1
Low-power mode
Isolate
Normal power mode
No effect
Low-power mode
–
0
0/5‡
Isolate from MII
–
0/1‡
0
Auto-Negotiation restart No effect
Restart Auto-Negotiation
SC
–
0.8
Duplex mode
Collision test
Half-duplex operation
Full-duplex operation
1
0.7
No effect
Always 0
Always 0
Always 0
Always 0
Always 0
Always 0
Always 0
Enable collision test
–
0
0
0.6
IEEE reserved
IEEE reserved
IEEE reserved
IEEE reserved
IEEE reserved
IEEE reserved
IEEE reserved
N/A
N/A
N/A
N/A
N/A
N/A
N/A
–
0†
0†
0†
0†
0†
0†
0†
0.5
–
0.4
–
0.3
–
0
0.2
–
0.1
–
0.0
–
IDT® 10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
16
ICS1894-40
REV G 060110
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
