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KSZ8721CL

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33
April 2005 19 M9999-041405
KS8721CL Micrel, Inc.
Address Name Description Mode
(1)
Default
1.10:7 Reserved RO 0
1.6 No Preamble 1 = preamble suppression; 0 = normal preamble. RO 1
1.5 Auto-Negotiation Complete 1 = auto-negotiation process completed. RO 0
0 = auto-negotiation process not completed.
1.4 Remote Fault 1 = remote fault; 0 = no remote fault. RO/LH 0
1.3 Auto-Negotiation Ability 1 = capable to perform auto-negotiation. RO 1
0 = unable to perform auto-negotiation.
1.2 Link Status 1 = link is up; 0 = link is down. RO/LL 0
1.1 Jabber Detect 1 = jabber detected; 0 = jabber not detected. Default is low. RO/LH 0
1.0 Extended Capability 1 = supports extended capabilities registers. RO 1
Register 2h - PHY Identifier 1
2.15:0 PHY ID Number Assigned to the 3rd through 18th bits of the organizationally. RO 0022h
unique identifier (OUI). Micrel’s OUI is 0010A1 (hex).
Register 3h - PHY Identifier 2
3.15:10 PHY ID Number Assigned to the 19th through 24th bits of the organizationally RO 000101
unique identifier (OUI). Micrel’s OUI is 0010A1 (hex).
3.9:4 Model Number Six bit manufacturer’s model number. RO 100001
3.3:0 Revision Number Four bit manufacturer’s model number. RO 1001
Register 4h - Auto-Negotiation Advertisement
4.15 Next Page 1 = next page capable; 0 = no next page capability. RW 0
4.14 Reserved RO 0
4.13 Remote Fault 1 = remote fault supported; 0 = no remote fault. RW 0
4.12 : 11 Reserved RO 0
4.10 Pause 1 = pause function supported; 0 = no pause function. RW 0
4.9 100BASE-T4 1 = T4 capable; 0 = no T4 capability. RO 0
4.8 100BASE-TX Full-Duplex 1 = TX with full-duplex; 0 = no TX full-duplex capability. RW Set by
SPD100 &
DUPLEX
4.7 100BASE-TX 1 = TX capable; 0 = no TX capability. RW Set by
SPD100
4.6 10BASE-T Full-Duplex 1 = 10Mbps with full-duplex. RW Set by
0 = no 10Mbps full-duplex capability. DUPLEX
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. RO 0
0 = link code word not yet received.
5.13 Remote Fault 1 = remote fault detected; 0 = no remote fault. RO 0
5.12 Reserved RO 0
Note:
1. 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 “Strapping
Options.”
KS8721CL Micrel, Inc.
M9999-041405 20 April 2005
Address Name Description Mode
(1)
Default
5.11:10 Pause 5.10 5 .11 RO 0
00
No PAUSE
01
Asymmetric PAUSE (link partner)
10
Symmetric PAUSE
11
Symmetric & Asymmetric PAUSE (local device)
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. RO 0
0 = no 10Mbps full-duplex capability.
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. RO/LH 0
0 = no fault detected by parallel detection.
6.3
Link Partner Next
1 = link partner has next page capability. RO 0
Page Able 0 = link partner does not have next page capability.
6.2 Next Page Able 1 = local device has next page capability. RO 1
0 = local device does not have next page capability.
6.1 Page Received 1 = new page received; 0 = new page not yet received. RO/LH 0
6.0 Link Partner 1 = link partner has auto-negotiation capability. RO 0
Auto-Negotiation Able 0 = link partner does not have auto-negotiation capability.
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
7.12 Acknowledge 2 1 = will comply with message. RW 0
0 = cannot comply with message.
7.11 Toggle 1 = previous value of the transmitted link code word. RO 0
equaled logic One; 0 = logic Zero.
7.10:0 Message Field 11-bit wide field to encode 2048 messages. RW 001
Register 8h - Link Partner Next Page Ability
8.15 Next Page 1 = additional next page(s) will follow; 0 = last page. RO 0
8.14 Acknowledge 1 = successful receipt of link word. RO 0
0 = no successful receipt of link word.
8.13 Message Page 1 = Message Page; 0 = unformatted page. RO 0
8.12 Acknowledge 2 1 = able to act on the information. RO 0
0 = not able to act on the information.
8.11 Toggle 1 = previous value of transmitted link code word equal RO 0
to logic zero; 0 = previous value of transmitted link code
word equal to logic one.
8.10:0 Message Field RO 0
Note:
1. 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 “Strapping
Options.”
April 2005 21 M9999-041405
KS8721CL Micrel, Inc.
Address Name Description Mode
(1)
Default
Register 15h - RXER Counter
15.15:0 RXER Counter RX Error counter for the RX_ER in each package. RO 0000
Register 1bh - Interrupt Control/Status Register
1b.15 Jabber Interrupt Enable 1 = Enable jabber interrupt; 0 = Disable jabber interrupt. RW 0
1b.14 Receive Error 1 = Enable receive error interrupt. RW 0
Interrupt Enable 0 = Disable receive error interrupt.
1b.13 Page Received 1 = Enable page received interrupt. RW 0
Interrupt Enable 0 = Disable page received interrupt.
1b.12 Parallel Detect Fault 1 = Enable parallel detect fault interrupt. RW 0
Interrupt Enable 0 = Disable parallel detect fault interrupt.
1b.11 Link Partner Acknowledge 1 = Enable link partner acknowledge interrupt. RW 0
Interrupt Enable 0 = Disable link partner acknowledge interrupt.
1b.10 Link Down 1 = Enable link down interrupt. RW 0
Interrupt Enable 0 = Disable link down interrupt.
1b.9 Remote Fault 1 = Enable remote fault interrupt. RW 0
Interrupt Enable 0 = Disable remote fault interrupt.
1b.8 Link Up Interrupt Enable 1 = Enable link up interrupt. RW 0
0 = Disable link up interrupt.
1b.7 Jabber Interrupt 1 = Jabber interrupt occurred. RO/SC 0
0 = Jabber interrupt has not occurred.
1b.6 Receive Error Interrupt 1 = Receive error occurred. RO/SC 0
0 = Receive error has not occurred.
1b.5 Page Receive Interrupt 1 = Page receive occurred. RO/SC 0
0 = Page receive has not occurred.
1b.4 Parallel Detect 1 = Parallel detect fault occurred. RO/SC 0
Fault Interrupt 0 = Parallel detect fault has not occurred.
1b.3 Link Partner 1 = Link partner acknowledge occurred. RO/SC 0
Acknowledge Interrupt 0 = Link partner acknowledge has not occurred.
1b.2 Link Down Interrupt 1 = Link down occurred. RO/SC 0
0 = Link down has not occurred.
1b.1 Remote Fault Interrupt 1 = Remote fault occurred. RO/SC 0
0 = Remote fault has not occurred.
1b.0 Link Up Interrupt 1 = Link up interrupt occurred. RO/SC 0
0 = Link up interrupt has not occurred.
Register 1fh - 100BASE-TX PHY Controller
1f.15:14 Reserved
1f:13 Pairswap Disable 1 = Disable MDI/MDI-X; 0 = Enable MDI/MDI-X. R/W 0
1f.12 Energy Detect 1 = Presence of signal on RX+/RX- analog wire pair. RO 0
0 = No signal detected on RX+/RX-.
1f.11 Force Link 1 = Force link pass; 0 = Normal link operation. R/W 0
This bit bypasses the control logic and allow transmitter
to send pattern even if there is no link.
1f.10 Power-Saving 1 = Enable power-saving; 0 = Disable. RW 1
1f.9 Interrupt Level 1 = Interrupt pin active high; 0 = Active low. RW 0
1f.8 Enable Jabber 1 = Enable jabber counter; 0 = Disable. RW 1
1f.7 Auto-Negotiation Complete 1 = Auto-Negotiation complete; 0 = Not complete. RW 0
Note:
1. 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 “Strapping
Options.”
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33

KSZ8721CL

Mfr. #:
Buy KSZ8721CL
Manufacturer:
Microchip Technology / Micrel
Description:
Ethernet ICs 10/100 BASE-TX/FX Physical Layer Transceiver
Lifecycle:
New from this manufacturer.
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