KSZ8721SL Micrel Inc, KSZ8721SL Datasheet - Page 19

• Manufacturer Part Number: KSZ8721SL
• Description: IC TXRX PHY 10/100 3.3V 48-SSOP
• Manufacturer: Micrel Inc
• Type: Transceiverr

Specifications of KSZ8721SL

• Number Of Drivers/receivers: 1/1
• Protocol: IEEE 802
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 48-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 576-1630 - BOARD EVALUATION FOR KSZ8721SL
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant
• Other names: 576-1031-5; 576-1512-5; 576-1512-5; KSZ8721SL

Micrel, Inc.
Register Map
June 2009
Address
Register 0h - Basic Control
0.15
0.14
0.13
0.12
0.11
0.10
0.9
0.8
0.7
0.6:1
0.0
Register 1h - Basic Status
1.15
1.14
Register No.
15h
1bh
1fh
0h
1h
2h
3h
4h
5h
6h
7h
8h
Name
Reset
Loop-Back
Speed Select (LSB)
Auto-Negotiation Enable
Power Down
Isolate
Restart Auto-Negotiation
Duplex Mode
Collision Test
Reserved
Disable
Transmitter
100BASE-T4
100BASE-TX Full-Duplex
Description
Basic Control Register
Basic Status Register
PHY Identifier I
PHY Identifier II
Auto-Negotiation Advertisement Register
Auto-Negotiation Link Partner Ability Register
Auto-Negotiation Expansion Register
Auto-Negotiation Next Page Register
Link Partner Next Page Ability
RXER Counter Register
Interrupt Control/Status Register
100BASE-TX PHY Control Register
Description
1 = software reset. Bit is self-clearing
1 = loop-back mode
0 = normal operation
1 = 100Mbps
0 = 10Mbps
Ignored if Auto-Negotiation is enabled (0.12 = 1)
1 = enable auto-negotiation process (override 0.13 and 0.8)
0 = disable auto-negotiation process
1 = power-down mode
0 = normal operation
1 = electrical isolation of PHY from MII and TX+/TX-
0 = normal operation
1 = restart auto-negotiation process
0 = normal operation. Bit is self-clearing
1 = full-duplex
0 = half-duplex
1 = enable COL test
0 = disable COL test
0 = enable transmitter
1 = disable transmitter
1 = T4 capable
0 = not T4 capable
1 = capable of 100BASE-X full-duplex
0 = not capable of 100BASE-X full-duplex
19
Default
RW/SC
RW
RW
RW
RW
RW
RW/SC
RW
RW
RO
RW
RO
RO
M9999-062509-1.3
(1)
KS8721BL/SL
Mode
0
Set by
SPD100
Set by
NWAYEN
0
0
Set by
DUPLEX
0
0
0
0
1
0
Set by ISO