KSZ8851SNL-BBE-EVAL Micrel Inc, KSZ8851SNL-BBE-EVAL Datasheet - Page 62

• Manufacturer Part Number: KSZ8851SNL-BBE-EVAL
• Description: BOARD EVAL MAC/PHY FOR KSZ8851
• Manufacturer: Micrel Inc
• Series: LinkMD®r

Specifications of KSZ8851SNL-BBE-EVAL

• Design Resources: BeagleBoard Zippy2
• Main Purpose: Interface, Ethernet Controller (PHY and MAC)
• Embedded: No
• Utilized Ic / Part: KSZ8851SNL
• Primary Attributes: 1 Port, 100BASE-TX/10BASE-T
• Secondary Attributes: SPI Interface, LinkMD Cable Diagnostics
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-3602; KSZ8851SNL-BBE-EVL; ZIPPY2

PHY Reset Register (0xD8 – 0xD9): PHYRR
This register contains a control bit to reset PHY block when write an “1”.
0xDA – 0xDF: Reserved
0xE0 – 0xE3: Reserved
PHY 1 MII-Register Basic Control Register (0xE4 – 0xE5): P1MBCR
This register contains Media Independent Interface (MII) register for port 1 as defined in the IEEE 802.3 specification.
August 2009
Micrel, Inc.
Bit
7-0
Bit
15-1
0
Bit
15
14
13
12
11-10
9
8
7-6
5
4
Default
0
0
1
1
0
0
1
0
1
0
-
0
Default
0x0C
Default
R/W
RO
RW
RW
RW
RW
RW
RW
RO
R/W
RW
R/W
RW
R/W
RW
WO
(Self
clear)
Description
Go-sleep Time
This value is used to control the minimum period that the no energy event has to be
detected consecutively before the device enters the low power state when the energy
detect mode is on. The unit is 1 sec +/-80%, the default go-sleep time is 12 sec (1s x 12).
Zero time (0x00) is not allowed.
Description
Reserved.
PHY Reset Bit
This bit is write only and self clear after write an “1”, it is used to reset PHY block circuitry.
Description
Reserved
Local (far-end) loopback (llb)
1 = perform local loopback at host
(host SPI Tx -> PHY -> host SPI Rx,
see Figure 14)
0 = normal operation
Force 100
1 = force 100Mbps if AN is disabled (bit 12)
0 = force 10Mbps if AN is disabled (bit 12)
AN Enable
1 = auto-negotiation enabled.
0 = auto-negotiation disabled.
Reserved
Restart AN
1 = restart auto-negotiation.
0 = normal operation.
Force Full Duplex
1 = force full duplex
0 = force half duplex.
if AN is disabled (bit 12) or AN is enabled but failed.
Reserved
HP_mdix
1 = HP Auto MDI-X mode.
0 = Micrel Auto MDI-X mode.
Force MDI-X
1 = force MDI-X.
0 = normal operation.
62
Bit is same as:
Bit 6 in P1CR
Bit 7 in P1CR
Bit 13 in P1CR
Bit 5 in P1CR
Bit 15 in P1SR
Bit 9 in P1CR
KSZ8851SNL/SNLI
M9999-083109-2.0