Datasheet

Micrel, Inc. KS8721BL/SL
June 2009
21
M9999-062509-1.3
Address Name Description Default
(1)
Mode
4.5 10BASE-T
1 = 10Mbps capable
0 = no 10Mbps capability
RW 1
4.4:0 Selector Field [00001] = IEEE 802.3 RW 00001
Register 5h - Auto-Negotiation Link Partner Ability
5.15 Next Page
1 = next page capable
0 = no next page capability
RO 0
5.14 Acknowledge
1 = link code word received from partner
0 = link code word not yet received
RO 0
5.13 Remote Fault 1 = remote fault detected; 0 = no remote fault RO 0
5.12 Reserved RO 0
5.11:10 Pause
5.10 5 .11
0 0
No PAUSE
0 1
Asymmetric PAUSE (link partner)
1 0
Symmetric PAUSE
1 1
Symmetric & Asymmetric PAUSE (local device)
RO 0
5.9 100 BASE-T4
1 = T4 capable
0 = no T4 capability
RO 0
5.8 100BASE-TX Full-Duplex
1 = TX with full-duplex
0 = no TX full-duplex capability
RO 0
5.7 100BASE-TX
1 = TX capable
0 = no TX capability
RO 0
5.6 10BASE-T Full-Duplex
1 = 10Mbps with full-duplex
0 = no 10Mbps full-duplex capability
RO 0
5.5 10BASE-T
1 = 10Mbps capable
0 = no 10Mbps capability
RO 0
5.4:0 Selector Field [00001] = IEEE 802.3 RO 00001
Register 6h - Auto-Negotiation Expansion
6.15:5 Reserved RO 0
6.4 Parallel Detection Fault
1 = fault detected by parallel detection
0 = no fault detected by parallel detection
RO/LH 0
6.3
Link Partner Next Page
Able
1 = link partner has next page capability
0 = link partner does not have next page capability
RO 0
6.2 Next Page Able
1 = local device has next page capability
0 = local device does not have next page capability
RO 1
6.1 Page Received
1 = new page received
0 = new page not yet received
RO/LH 0
6.0
Link Partner
Auto-Negotiation Able
1 = link partner has auto-negotiation capability
0 = link partner does not have auto-negotiation capability
RO 0
Register 7h - Auto-Negotiation Next Page
7.15 Next Page
1 = additional next page(s) will follow
0 = last page
RW 0
7.14 Reserved RO 0
7.13 Message Page
1 = message page
0 = unformatted page
RW 1