ksz8021rnli Micrel Semiconductor, ksz8021rnli Datasheet - Page 24

• Manufacturer Part Number: ksz8021rnli
• Description: 10base-t/100base-tx Phy With Rmii Support
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
Register Map
Register Description
August 2010
Register 0h – Basic Control
Address
Register Number (Hex)
0.15
0.14
0.13
0.12
19h – 1Ah
12h – 14h
1Bh
1Ch
1Dh
1Eh
10h
11h
15h
16h
17h
18h
1Fh
0h
1h
2h
3h
4h
5h
6h
7h
8h
9h
Speed Select
Negotiation
Loop-back
Enable
Name
Reset
Auto-
Description
Basic Control
Basic Status
PHY Identifier 1
PHY Identifier 2
Auto-Negotiation Advertisement
Auto-Negotiation Link Partner Ability
Auto-Negotiation Expansion
Auto-Negotiation Next Page
Link Partner Next Page Ability
Reserved
Digital Reserved Control
AFE Control 1
Reserved
RXER Counter
Operation Mode Strap Override
Operation Mode Strap Status
Expanded Control
Reserved
Interrupt Control/Status
Reserved
LinkMD
PHY Control 1
PHY Control 2
Description
1 = Software reset
0 = Normal operation
This bit is self-cleared after a ‘1’ is written to it.
1 = Loop-back mode
0 = Normal operation
1 = 100Mbps
0 = 10Mbps
This bit is ignored if auto-negotiation is enabled
(register 0.12 = 1).
1 = Enable auto-negotiation process
0 = Disable auto-negotiation process
If enabled, auto-negotiation result overrides
settings in register 0.13 and 0.8.
®
Control/Status
24
Mode
RW/SC
RW
RW
RW
(1)
Default
0
0
Set by ANEN_SPEED strapping
pin.
See “Strapping Options” section
for details.
Set by ANEN_SPEED strapping
pin.
See “Strapping Options” section
for details.
KSZ8021RNL / KSZ8031RNL
M9999-082710-1.0