KS8721B A4 Micrel Inc, KS8721B A4 Datasheet - Page 17

• Manufacturer Part Number: KS8721B A4
• Manufacturer: Micrel Inc

Specifications of KS8721B A4

• Lead Free Status / RoHS Status: Not Compliant

Register Map
Note 1.
March 2006
Address
Address
Address
Register 0h - Basic Control
Register 0h - Basic Control
0.15
0.15
0.15
0.15
0.15
0.15
0.14
0.14
0.14
0.14
0.14
0.14
0.13
0.13
0.13
0.13
0.13
0.13
0.12
0.12
0.12
0.12
0.12
0.12
0.11
0.11
0.11
0.11
0.11
0.10
0.10
0.10
0.10
0.10
0.10
0.9
0.9
0.9
0.9
0.9
0.9
0.8
0.8
0.8
0.8
0.8
0.8
0.7
0.7
0.7
0.7
0.7
0.7
0.6:1
0.6:1
0.6:1
0.6:1
0.6:1
0.6:1
0.0
0.0
0.0
0.0
0.0
0.0
Register 1h - Basic Status
Register 1h - Basic Status
1.15
1.15
1.15
1.15
1.15
1.15
1.14
1.14
1.14
1.14
1.14
1.14
1.13
1.13
1.13
1.13
1.13
1.13
1.12
1.12
1.12
1.12
1.12
1.12
1.11
1.11
1.11
1.11
1.11
1.11
Register No.
Register No.
RW: Read/Write, RO: Read only, SC: Self clear, LH: Latch High, LL: Latch Low. Some of the default values are set by strap-in. See “Srap-
ping Options.”
15h
15h
15h
1bh
1bh
1bh
1fh
1fh
1fh
0h
0h
0h
1h
1h
1h
2h
2h
2h
3h
3h
3h
4h
4h
4h
5h
5h
5h
6h
6h
6h
7h
7h
7h
8h
8h
8h
Reset
Reset
Reset
Reset
Reset
Reset
Loop-back
Loop-back
Loop-back
Loop-back
Loop-back
Loop-back
Speed Select (LSB)
Speed Select (LSB)
Speed Select (LSB)
Speed Select (LSB)
Speed Select (LSB)
Speed Select (LSB)
Auto-Negotiation Enable
Auto-Negotiation Enable
Auto-Negotiation Enable
Auto-Negotiation Enable
Auto-Negotiation Enable
Auto-Negotiation Enable
Power Down
Power Down
Power Down
Power Down
Power Down
Isolate
Isolate
Isolate
Isolate
Isolate
Isolate
Restart Auto-Negotiation
Restart Auto-Negotiation
Restart Auto-Negotiation
Restart Auto-Negotiation
Restart Auto-Negotiation
Restart Auto-Negotiation
Duplex Mode
Duplex Mode
Duplex Mode
Duplex Mode
Duplex Mode
Duplex Mode
Collision Test
Collision Test
Collision Test
Collision Test
Collision Test
Collision Test
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Disable
Disable
Disable
Disable
Disable
Disable
Transmitter
Transmitter
Transmitter
Transmitter
100BaseT4
100BaseT4
100BaseT4
100BaseT4
100BaseT4
100BaseT4
100BaseTX Full Duplex
100BaseTX Full Duplex
100BaseTX Full Duplex
100BaseTX Full Duplex
100BaseTX Full Duplex
100BaseTX Full Duplex
100BaseTX Half Duplex
100BaseTX Half Duplex
100BaseTX Half Duplex
100BaseTX Half Duplex
100BaseTX Half Duplex
100BaseTX Half Duplex
10BaseT Full Duplex
10BaseT Full Duplex
10BaseT Full Duplex
10BaseT Full Duplex
10BaseT Full Duplex
10BaseT Full Duplex
10BaseT Half Duplex
10BaseT Half Duplex
10BaseT Half Duplex
10BaseT Half Duplex
10BaseT Half Duplex
10BaseT Half Duplex
Name
Name
Name
Description
Description
Basic Control Register
Basic Control Register
Basic Control Register
Basic Status Register
Basic Status Register
Basic Status Register
PHY Identifi er I
PHY Identifi er I
PHY Identifi er I
PHY Identifi er II
PHY Identifi er II
PHY Identifi er II
Auto-Negotiation Advertisement Register
Auto-Negotiation Advertisement Register
Auto-Negotiation Advertisement Register
Auto-Negotiation Link Partner Ability Register
Auto-Negotiation Link Partner Ability Register
Auto-Negotiation Link Partner Ability Register
Auto-Negotiation Expansion Register
Auto-Negotiation Expansion Register
Auto-Negotiation Expansion Register
Auto-Negotiation Next Page Register
Auto-Negotiation Next Page Register
Auto-Negotiation Next Page Register
Link Partner Next Page Ability
Link Partner Next Page Ability
Link Partner Next Page Ability
RXER Counter Register
RXER Counter Register
RXER Counter Register
Interrupt Control/Status Register
Interrupt Control/Status Register
Interrupt Control/Status Register
100BaseTX PHY Control Register
100BaseTX PHY Control Register
100BaseTX PHY Control Register
Description
Description
Description
1 = software reset. Bit is self-clearing
1 = software reset. Bit is self-clearing
1 = software reset. Bit is self-clearing
1 = software reset. Bit is self-clearing
1 = software reset. Bit is self-clearing
1 = software reset. Bit is self-clearing
1 = loop-back mode; 0 = normal operation
1 = loop-back mode; 0 = normal operation
1 = loop-back mode; 0 = normal operation
1 = loop-back mode; 0 = normal operation
1 = loop-back mode; 0 = normal operation
1 = loop-back mode; 0 = normal operation
1 = 100Mbps; 0 = 10Mbps
1 = 100Mbps; 0 = 10Mbps
1 = 100Mbps; 0 = 10Mbps
1 = 100Mbps; 0 = 10Mbps
1 = 100Mbps; 0 = 10Mbps
1 = 100Mbps; 0 = 10Mbps
Ignored if Auto-Negotiation is enabled (0.12 = 1)
Ignored if Auto-Negotiation is enabled (0.12 = 1)
Ignored if Auto-Negotiation is enabled (0.12 = 1)
Ignored if Auto-Negotiation is enabled (0.12 = 1)
Ignored if Auto-Negotiation is enabled (0.12 = 1)
Ignored if Auto-Negotiation is enabled (0.12 = 1)
1 = enable auto-negotiation process (override 0.13 and 0.8) RW
1 = enable auto-negotiation process (override 0.13 and 0.8) RW
1 = enable auto-negotiation process (override 0.13 and 0.8) RW
1 = enable auto-negotiation process (override 0.13 and 0.8) RW
1 = enable auto-negotiation process (override 0.13 and 0.8) RW
1 = enable auto-negotiation process (override 0.13 and 0.8) RW
0 = disable auto-negotiation process
0 = disable auto-negotiation process
0 = disable auto-negotiation process
0 = disable auto-negotiation process
0 = disable auto-negotiation process
0 = disable auto-negotiation process
1 = power down mode; 0 = normal operation
1 = power down mode; 0 = normal operation
1 = power down mode; 0 = normal operation
1 = power down mode; 0 = normal operation
1 = power down mode; 0 = normal operation
1 = electrical isolation of PHY from MII and TX+/TX-
1 = electrical isolation of PHY from MII and TX+/TX-
1 = electrical isolation of PHY from MII and TX+/TX-
1 = electrical isolation of PHY from MII and TX+/TX-
1 = electrical isolation of PHY from MII and TX+/TX-
1 = electrical isolation of PHY from MII and TX+/TX-
0 = normal operation
0 = normal operation
0 = normal operation
0 = normal operation
1 = restart auto-negotiation process
1 = restart auto-negotiation process
1 = restart auto-negotiation process
1 = restart auto-negotiation process
1 = restart auto-negotiation process
1 = restart auto-negotiation process
0 = normal operation. Bit is self-clearing
0 = normal operation. Bit is self-clearing
0 = normal operation. Bit is self-clearing
0 = normal operation. Bit is self-clearing
0 = normal operation. Bit is self-clearing
1 = full duplex; 0 = half duplex
1 = full duplex; 0 = half duplex
1 = full duplex; 0 = half duplex
1 = full duplex; 0 = half duplex
1 = full duplex; 0 = half duplex
1 = full duplex; 0 = half duplex
1 = enable COL test; 0 = disable COL test
1 = enable COL test; 0 = disable COL test
1 = enable COL test; 0 = disable COL test
1 = enable COL test; 0 = disable COL test
1 = enable COL test; 0 = disable COL test
1 = enable COL test; 0 = disable COL test
0 = enable transmitter
0 = enable transmitter
0 = enable transmitter
0 = enable transmitter
0 = enable transmitter
0 = enable transmitter
1 = disable transmitter
1 = disable transmitter
1 = disable transmitter
1 = disable transmitter
1 = T4 capable; 0 = not T4 capable
1 = T4 capable; 0 = not T4 capable
1 = T4 capable; 0 = not T4 capable
1 = T4 capable; 0 = not T4 capable
1 = T4 capable; 0 = not T4 capable
1 = T4 capable; 0 = not T4 capable
1 = capable of 100BaseX full duplex
1 = capable of 100BaseX full duplex
1 = capable of 100BaseX full duplex
1 = capable of 100BaseX full duplex
1 = capable of 100BaseX full duplex
1 = capable of 100BaseX full duplex
0 = not capable of 100BaseX full duplex
0 = not capable of 100BaseX full duplex
0 = not capable of 100BaseX full duplex
0 = not capable of 100BaseX full duplex
1 = capable of 100BaseX half duplex
1 = capable of 100BaseX half duplex
1 = capable of 100BaseX half duplex
1 = capable of 100BaseX half duplex
1 = capable of 100BaseX half duplex
1 = capable of 100BaseX half duplex
0 = not capable of 100BaseX half duplex
0 = not capable of 100BaseX half duplex
0 = not capable of 100BaseX half duplex
0 = not capable of 100BaseX half duplex
1 = 10Mbps with full duplex
1 = 10Mbps with full duplex
1 = 10Mbps with full duplex
1 = 10Mbps with full duplex
1 = 10Mbps with full duplex
1 = 10Mbps with full duplex
0 = no 10Mbps with full duplex capability
0 = no 10Mbps with full duplex capability
0 = no 10Mbps with full duplex capability
0 = no 10Mbps with full duplex capability
1 = 10Mbps with half duplex
1 = 10Mbps with half duplex
1 = 10Mbps with half duplex
1 = 10Mbps with half duplex
1 = 10Mbps with half duplex
1 = 10Mbps with half duplex
0 = no 10Mbps with half duplex capability
0 = no 10Mbps with half duplex capability
0 = no 10Mbps with half duplex capability
0 = no 10Mbps with half duplex capability
17
Mode
Mode
Mode
(Note 1)
Default
Default
RW
RW
RW
RW
RW
RW
RW/SC
RW/SC
RW/SC
RW/SC
RW/SC
RW/SC
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW/SC
RW/SC
RW/SC
RW/SC
RW/SC
RW/SC
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RO
RO
RO
RO
RO
RO
R/W
R/W
R/W
R/W
R/W
R/W
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
0
0
0
0
0
0
0
0
0
0
0
0
Set by
Set by
Set by
Set by
Set by
Set by
SPD100
SPD100
SPD100
SPD100
SPD100
SPD100
Set by
Set by
Set by
Set by
Set by
Set by
NWAYEN
NWAYEN
NWAYEN
NWAYEN
NWAYEN
NWAYEN
0
0
0
0
0
Set by ISO
Set by ISO
Set by ISO
Set by ISO
Set by ISO
Set by ISO
0
0
0
0
0
0
Set by
Set by
Set by
Set by
Set by
Set by
DUPLEX
DUPLEX
DUPLEX
DUPLEX
DUPLEX
DUPLEX
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
M9999-030106