LAN9312-NU Standard Microsystems (SMSC), LAN9312-NU Datasheet - Page 5
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LAN9312-NU
Manufacturer Part Number
LAN9312-NU
Description
Manufacturer
Standard Microsystems (SMSC)
Datasheet
1.LAN9312-NU.pdf
(458 pages)
Specifications of LAN9312-NU
Number Of Primary Switch Ports
2
Operating Supply Voltage (typ)
3.3V
Fiber Support
No
Phy/transceiver Interface
MII
Power Supply Type
Analog
Data Rate (typ)
10/100Mbps
Vlan Support
Yes
Operating Temperature (max)
70C
Operating Temperature (min)
0C
Pin Count
128
Mounting
Surface Mount
Jtag Support
No
Operating Supply Voltage (max)
3.6V
Operating Supply Voltage (min)
3V
Operating Temperature Classification
Commercial
Data Rate
100Mbps
Lead Free Status / RoHS Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LAN9312-NU
Manufacturer:
Microchip Technology
Quantity:
10 000
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High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
7.2.2
7.2.3
7.2.4
7.2.5
7.2.6
7.2.7
7.2.8
7.2.9
7.2.10 PHY Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
7.2.11 LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
7.2.12 Required Ethernet Magnetics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
7.3
7.3.1
7.3.2
Chapter 8 Host Bus Interface (HBI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
8.1
8.2
8.3
8.4
8.4.1
8.4.2
8.4.3
8.4.4
8.4.5
8.4.6
8.4.7
8.4.8
8.4.9
8.5
Chapter 9 Host MAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
9.1
SMSC LAN9312
7.2.1.6
7.2.2.1
7.2.2.2
7.2.2.3
7.2.2.4
7.2.2.5
7.2.2.6
7.2.2.7
7.2.3.1
7.2.3.2
7.2.4.1
7.2.4.2
7.2.4.3
7.2.4.4
7.2.5.1
7.2.5.2
7.2.5.3
7.2.5.4
7.2.5.5
7.2.8.1
7.2.9.1
7.2.9.2
7.2.10.1
7.2.10.2
7.2.10.3
7.3.1.1
7.3.1.2
7.3.1.3
7.3.2.1
7.3.2.2
7.3.2.3
8.4.1.1
8.4.1.2
Virtual PHY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Host Memory Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Host Endianess. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Host Interface Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
HBI Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
100BASE-TX Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
10BASE-T Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
10BASE-T Receive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
PHY Auto-negotiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
HP Auto-MDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
MII MAC Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
PHY Management Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
PHY Power-Down Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Virtual PHY Auto-Negotiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Virtual PHY Resets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Special Situations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Special Restrictions on Back-to Back Write-Read Cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Special Restrictions on Back-to-Back Read Cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
PIO Reads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
PIO Burst Reads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
RX Data FIFO Direct PIO Reads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
RX Data FIFO Direct PIO Burst Reads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
PIO Writes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
TX Data FIFO Direct PIO Writes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
100M Phase Lock Loop (PLL) ........................................................................................................................................................................ 86
A/D Converter ................................................................................................................................................................................................. 87
DSP: Equalizer, BLW Correction and Clock/Data Recovery .......................................................................................................................... 87
NRZI and MLT-3 Decoding ............................................................................................................................................................................. 88
Descrambler and SIPO ................................................................................................................................................................................... 88
5B/4B Decoding .............................................................................................................................................................................................. 88
Receiver Errors ............................................................................................................................................................................................... 88
MII MAC Interface ........................................................................................................................................................................................... 88
MII MAC Interface ........................................................................................................................................................................................... 89
10M TX Driver and PLL .................................................................................................................................................................................. 89
Filter and Squelch ........................................................................................................................................................................................... 89
10M RX and PLL............................................................................................................................................................................................. 89
MII MAC Interface ........................................................................................................................................................................................... 90
Jabber Detection............................................................................................................................................................................................. 90
PHY Pause Flow Control ................................................................................................................................................................................ 92
Parallel Detection............................................................................................................................................................................................ 92
Restarting Auto-Negotiation............................................................................................................................................................................ 92
Disabling Auto-Negotiation ............................................................................................................................................................................. 92
Half Vs. Full-Duplex ........................................................................................................................................................................................ 93
PHY Interrupts ................................................................................................................................................................................................ 94
PHY General Power-Down ............................................................................................................................................................................. 95
PHY Energy Detect Power-Down ................................................................................................................................................................... 95
PHY Software Reset via RESET_CTL............................................................................................................................................................ 95
PHY Software Reset via PHY_BASIC_CTRL_x ............................................................................................................................................. 96
PHY Power-Down Reset................................................................................................................................................................................. 96
Parallel Detection............................................................................................................................................................................................ 97
Disabling Auto-Negotiation ............................................................................................................................................................................. 97
Virtual PHY Pause Flow Control ..................................................................................................................................................................... 98
Virtual PHY Software Reset via RESET_CTL ................................................................................................................................................ 98
Virtual PHY Software Reset via VPHY_BASIC_CTRL ................................................................................................................................... 98
Virtual PHY Software Reset via PMT_CTRL .................................................................................................................................................. 98
Reset Ending During a Read Cycle .............................................................................................................................................................. 101
Writes Following a Reset .............................................................................................................................................................................. 101
DATASHEET
5
Revision 1.7 (06-29-10)
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