KSZ9031MNX Gigabit Ethernet Transceiver with GMII/MII Support Revision 2.2 General Description Features The KSZ9031MNX is a completely integrated triple-speed (10Base-T/100Base-TX/1000Base-T) Ethernet physicallayer transceiver for transmission and reception of data on standard CAT-5 unshielded twisted pair (UTP) cable. • Single-chip 10/100/1000Mbps IEEE 802.3 compliant Ethernet transceiver • GMII/MII standard interface with 3.3V/2.5V/1.8V tolerant I/Os • Auto-negotiation to automatically select the highest linkup speed (10/100/1000Mbps) and duplex (half/full) • On-chip termination resistors for the differential pairs • On-chip LDO controller to support single 3.3V supply operation – requires only one external FET to generate 1.2V for the core • Jumbo frame support up to 16KB • 125MHz reference clock output • Energy-detect power-down mode for reduced power consumption when the cable is not attached • Energy Efficient Ethernet (EEE) support with low-power idle (LPI) mode and clock stoppage for 100Base-TX/ 1000Base-T and transmit amplitude reduction with 10Base-Te option • Wake-On-LAN (WOL) support with robust custompacket detection The KSZ9031MNX offers the industry-standard GMII/MII (Gigabit Media Independent Interface / Media Independent Interface) for connection to GMII/MII MACs in Gigabit Ethernet processors and switches for data transfer at 1000Mbps or 10/100Mbps. The KSZ9031MNX reduces board cost and simplifies board layout by using on-chip termination resistors for the four differential pairs and by integrating an LDO controller to drive a low-cost MOSFET to supply the 1.2V core. The KSZ9031MNX offers diagnostic features to facilitate system bring-up and debugging in production testing and in product deployment. Parametric NAND tree support enables fault detection between KSZ9031MNX I/Os and ® the board. The LinkMD TDR-based cable diagnostic identifies faulty copper cabling. Remote and local loopback functions verify analog and digital data paths. The KSZ9031MNX is available in a 64-pin, lead-free QFN package (see Ordering Information). Data sheets and support documentation are available on Micrel’s web site at: www.micrel.com. Functional Diagram LinkMD is a registered trademark of Micrel, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com May 14, 2015 Revision 2.2 Micrel, Inc. KSZ9031MNX Features (Continued) Applications • Programmable LED outputs for link, activity, and speed • Baseline wander correction • LinkMD TDR-based cable diagnostic to identify faulty copper cabling • Parametric NAND tree support to detect faults between chip I/Os and board. • Loopback modes for diagnostics • Automatic MDI/MDI-X crossover to detect and correct pair swap at all speeds of operation • Automatic detection and correction of pair swaps, pair skew, and pair polarity • MDC/MDIO management interface for PHY register configuration • Interrupt pin option • Power-down and power-saving modes • Operating voltages − Core (DVDDL, AVDDL, AVDDL_PLL): 1.2V (external FET or regulator) − VDD I/O (DVDDH): 3.3V, 2.5V, or 1.8V − Transceiver (AVDDH): 3.3V or 2.5V (commercial temp) • Available in a 64-pin QFN (8mm × 8mm) package • • • • • • • • • • • Laser/Network printer Network attached storage (NAS) Network server Broadband gateway Gigabit SOHO/SMB router IPTV IP set-top box Game console IP camera Triple-play (data, voice, video) media center Media converter Ordering Information Temperature Range Package Lead Finish Wire Bonding 0°C to 70°C 64-Pin QFN Pb-Free Gold GMII/MII, Commercial Temperature, Gold Wire Bonding 0°C to 70°C 64-Pin QFN Pb-Free Copper GMII/MII, Commercial Temperature, Copper Wire Bonding (1) −40°C to 85°C 64-Pin QFN Pb-Free Gold GMII/MII, Industrial Temperature, Gold Wire Bonding (1) −40°C to 85°C 64-Pin QFN Pb-Free Copper GMII/MII, Industrial Temperature, Copper Wire Bonding 0°C to 70°C 64-Pin QFN Pb-Free Part Number KSZ9031MNXCA (1) KSZ9031MNXCC KSZ9031MNXIA KSZ9031MNXIC Description KSZ9031MNX Evaluation Board KSZ9031MNX-EVAL (Mounted with KSZ9031MNX device in commercial temperature) Note: 1. Contact factory for availability May 14, 2015 2 Revision 2.2 Micrel, Inc. KSZ9031MNX Revision History Revision Date Summary of Changes 1.0 10/31/12 2.0 07/31/13 2.1 03/02/15 2.2 5/14/15 Data sheet created. • Updated Functional Diagram with “PME_N” signal. • Indicated pin type is not an open-drain for PME_N1 (Pin 19) and INT_N/PME_N2 (Pin 53) (10) • Deleted TSLP package height from Package Information and Recommended Landing Pattern. • Added typical series resistance and load capacitance for crystal selection criteria. • Corrected register definition for override strap-in for LED_MODE in MMD Address 2h, Register 0h. • Clarified register description for software power-down bit (Register 0h, Bit [11]). • Clarified power cycling specification to have all supply voltages to the KSZ9031MNX reach less than 0.4V before the next power-up cycle. (10) • Corrected Package Information and Recommended Landing Pattern for 64-pin (8mm × 8mm) QFN. This is a datasheet correction. There is no change to the 64-pin (8mm × 8mm) QFN package. • Added more details for XI (25MHz reference clock) input specification to Reference Clock – Connection and Selection section. • Added note in Standard Register 0h, Bit [12] to indicate when Auto-Negotiation is disabled, Auto MDI-X is also automatically disabled. • Added note in 10Base-T Receive section that all 7 bytes of preamble are removed. • Added instruction in Register 9h, Bits [15:13] to enable 1000Base-T Test Mode. • Added description in Auto-Negotiation Timing section to change FLP timing from 8ms to 16ms. • Added MMD Address 0h, Registers 3h and 4h for FLP timing. • Specified maximum frequency (minimum clock period) for MDC clock. (10) • Updated input leakage current for the digital input pins in Electrical Characteristics section. (10) • Added minimum output currents for the digital output pins in Electrical Characteristics section. (10) • Corrected output drive current for LED1 and LED2 pins in Electrical Characteristics section. • Updated Reset Circuit section and added reset circuit with MIC826 Voltage Supervisor. • Clarified LED indication support for 1.8V DVDDH requires voltage level shifters. • Added 10/100Mbps Speeds only section. • Added section for MOSFET selection for optional on-chip LDO controller. May 14, 2015 3 Revision 2.2 Micrel, Inc. KSZ9031MNX Contents General Description ................................................................................................................................................................ 1 Features .................................................................................................................................................................................. 1 Functional Diagram ................................................................................................................................................................. 1 Applications ............................................................................................................................................................................. 2 Ordering Information ............................................................................................................................................................... 2 Revision History ...................................................................................................................................................................... 3 Contents .................................................................................................................................................................................. 4 List of Figures .......................................................................................................................................................................... 7 List of Tables ........................................................................................................................................................................... 8 Pin Configuration ..................................................................................................................................................................... 9 Pin Description ...................................................................................................................................................................... 10 Strapping Options ................................................................................................................................................................. 17 Functional Overview .............................................................................................................................................................. 18 Functional Description: 10Base-T/100Base-TX Transceiver ................................................................................................ 19 100Base-TX Transmit 100Base-TX Receive Scrambler/De-Scrambler (100Base-TX only) 10Base-T Transmit 10Base-T Receive 19 19 19 19 19 Functional Description: 1000Base-T Transceiver ................................................................................................................. 20 Analog Echo-Cancellation Circuit Automatic Gain Control (AGC) Analog-to-Digital Converter (ADC) Timing Recovery Circuit Adaptive Equalizer Trellis Encoder and Decoder 20 20 21 21 21 21 Functional Description: Additional 10/100/1000 PHY Features ............................................................................................ 22 Pair-Swap, Alignment, and Polarity Check Wave Shaping, Slew-Rate Control, and Partial Response PLL Clock Synthesizer 22 22 22 Auto-Negotiation ................................................................................................................................................................... 23 10/100Mbps Speeds only...................................................................................................................................................... 24 GMII Interface........................................................................................................................................................................ 25 GMII Signal Definition GMII Signal Diagram 26 26 MII Interface .......................................................................................................................................................................... 27 MII Signal Definition MII Signal Diagram 28 28 MII Management (MIIM) Interface ......................................................................................................................................... 29 Interrupt (INT_N) ................................................................................................................................................................... 30 May 14, 2015 4 Revision 2.2 Micrel, Inc. KSZ9031MNX LED Mode ............................................................................................................................................................................. 30 Single-LED Mode Tri-Color Dual-LED Mode 30 30 Loopback Mode ..................................................................................................................................................................... 31 Local (Digital) Loopback Remote (Analog) Loopback 31 32 ® LinkMD Cable Diagnostic .................................................................................................................................................... 33 NAND Tree Support .............................................................................................................................................................. 33 Power Management .............................................................................................................................................................. 34 Energy-Detect Power-Down Mode Software Power-Down Mode Chip Power-Down Mode 34 34 34 Energy Efficient Ethernet (EEE) ............................................................................................................................................ 35 Transmit Direction Control (MAC-to-PHY) Receive Direction Control (PHY-to-MAC) Registers Associated with EEE 36 37 37 Wake-On-LAN ....................................................................................................................................................................... 38 Magic-Packet Detection Customized-Packet Detection Link Status Change Detection 38 38 39 Typical Current/Power Consumption .................................................................................................................................... 40 Register Map ......................................................................................................................................................................... 42 IEEE-Defined Registers Vendor-Specific Registers 42 42 Standard Registers ............................................................................................................................................................... 45 IEEE Defined Registers – Descriptions Vendor-Specific Registers – Descriptions 45 53 MMD Registers...................................................................................................................................................................... 56 MMD Registers – Descriptions 57 Absolute Maximum Ratings .................................................................................................................................................. 66 Operating Ratings ................................................................................................................................................................. 66 Electrical Characteristics ....................................................................................................................................................... 66 Timing Diagrams ................................................................................................................................................................... 70 GMII Transmit Timing GMII Receive Timing MII Transmit Timing MII Receive Timing Auto-Negotiation Timing MDC/MDIO Timing Power-Up/Power-Down/Reset Timing 70 71 72 73 74 75 76 Reset Circuit .......................................................................................................................................................................... 77 Reference Circuits – LED Strap-In Pins ................................................................................................................................ 78 Reference Clock – Connection and Selection ...................................................................................................................... 79 May 14, 2015 5 Revision 2.2 Micrel, Inc. KSZ9031MNX On-chip LDO Controller – MOSFET Selection ...................................................................................................................... 79 Magnetic – Connection and Selection .................................................................................................................................. 80 Package Information and Recommended Landing Pattern .................................................................................................. 82 May 14, 2015 6 Revision 2.2 Micrel, Inc. KSZ9031MNX List of Figures Figure 1. KSZ9031MNX Block Diagram .............................................................................................................................. 18 Figure 2. KSZ9031MNX 1000Base-T Block Diagram – Single Channel ............................................................................. 20 Figure 3. Auto-Negotiation Flow Chart ................................................................................................................................. 23 Figure 4. KSZ9031MNX GMII Interface ............................................................................................................................... 26 Figure 5. KSZ9031MNX MII Interface .................................................................................................................................. 28 Figure 6. Local (Digital) Loopback ....................................................................................................................................... 31 Figure 7. Remote (Analog) Loopback .................................................................................................................................. 32 Figure 8. LPI Mode (Refresh Transmissions and Quiet Periods) ........................................................................................ 35 Figure 9. LPI Transition – GMII (1000Mbps) Transmit ........................................................................................................ 36 Figure 10. LPI Transition – MII (100Mbps) Transmit ........................................................................................................... 36 Figure 11. LPI Transition – GMII (1000Mbps) Receive ....................................................................................................... 37 Figure 12. LPI Transition – MII (100Mbps) Receive ............................................................................................................ 37 Figure 13. GMII Transmit Timing – Data Input to PHY ........................................................................................................ 70 Figure 14. GMII Receive Timing – Data Input to MAC ........................................................................................................ 71 Figure 15. MII Transmit Timing – Data Input to PHY ........................................................................................................... 72 Figure 16. MII Receive Timing – Data Input to MAC ........................................................................................................... 73 Figure 17. Auto-Negotiation Fast Link Pulse (FLP) Timing ................................................................................................. 74 Figure 18. MDC/MDIO Timing.............................................................................................................................................. 75 Figure 19. Power-Up/Power-Down/Reset Timing ................................................................................................................ 76 Figure 20. Reset Circuit for triggering by Power Supply ...................................................................................................... 77 Figure 21. Reset Circuit for Interfacing with CPU/FPGA Reset Output ............................................................................... 77 Figure 22. Rest Circuit with MIC826 Voltage Supervisor ...................................................................................................... 78 Figure 23. Reference Circuits for LED Strapping Pins......................................................................................................... 78 Figure 24. 25MHz Crystal/Oscillator Reference Clock Connection ..................................................................................... 79 Figure 25. Typical Gigabit Magnetic Interface Circuit .......................................................................................................... 80 May 14, 2015 7 Revision 2.2 Micrel, Inc. KSZ9031MNX List of Tables Table 1. MDI/MDI-X Pin Mapping ........................................................................................................................................ 22 Table 2. Auto-Negotiation Timers ........................................................................................................................................ 24 Table 3. GMII Signal Definition ............................................................................................................................................ 26 Table 4. MII Signal Definition ............................................................................................................................................... 28 Table 5. MII Management Frame Format for the KSZ9031MNX ......................................................................................... 29 Table 6. Single-LED Mode – Pin Definition .......................................................................................................................... 30 Table 7. Tri-Color Dual-LED Mode – Pin Definition ............................................................................................................. 30 Table 8. NAND Tree Test Pin Order for KSZ9031MNX ....................................................................................................... 33 Table 9. Typical Current/Power Consumption – Transceiver (3.3V), Digital I/Os (3.3V) ..................................................... 40 Table 10. Typical Current/Power Consumption – Transceiver (3.3V), Digital I/Os (1.8V) ................................................... 40 Table 11. Typical Current/Power Consumption – Transceiver (2.5V), Digital I/Os (2.5V) ................................................... 41 Table 12. Typical Current/Power Consumption – Transceiver (2.5V), Digital I/Os (1.8V) ................................................... 41 Table 13. Standard Registers Supported by KSZ9031MNX ................................................................................................ 42 Table 14. MMD Registers Supported by KSZ9031MNX ...................................................................................................... 43 Table 15. Portal Registers (Access to Indirect MMD Registers).......................................................................................... 56 Table 16. GMII Transmit Timing Parameters ....................................................................................................................... 70 Table 17. GMII Receive Timing Parameters ........................................................................................................................ 71 Table 18. MII Transmit Timing Parameters .......................................................................................................................... 72 Table 19. MII Receive Timing Parameters ........................................................................................................................... 73 Table 20. Auto-Negotiation Fast Link Pulse (FLP) Timing Parameters ............................................................................... 74 Table 21. MDC/MDIO Timing Parameters ........................................................................................................................... 75 Table 22. Power-Up/Power-Down/Reset Timing Parameters ............................................................................................. 76 Table 23. Reference Crystal/Clock Selection Criteria .......................................................................................................... 79 Table 24. Magnetics Selection Criteria ................................................................................................................................ 81 Table 25. Compatible Single-Port 10/100/1000 Magnetics ................................................................................................. 81 May 14, 2015 8 Revision 2.2 Micrel, Inc. KSZ9031MNX Pin Configuration 64-Pin QFN (Top View) May 14, 2015 9 Revision 2.2 Micrel, Inc. KSZ9031MNX Pin Description Pin Number Pin Name 1 AVDDH Type (2) P Pin Function 3.3V/2.5V (commercial temp only) analog VDD Media Dependent Interface[0], positive signal of differential pair 1000Base-T mode: 2 TXRXP_A I/O TXRXP_A corresponds to BI_DA+ for MDI configuration and BI_DB+ for MDI-X configuration, respectively. 10Base-T/100Base-TX mode: TXRXP_A is the positive transmit signal (TX+) for MDI configuration and the positive receive signal (RX+) for MDI-X configuration, respectively. Media Dependent Interface[0], negative signal of differential pair 1000Base-T mode: 3 TXRXM_A I/O TXRXM_A corresponds to BI_DA– for MDI configuration and BI_DB– for MDI-X configuration, respectively. 10Base-T/100Base-TX mode: TXRXM_A is the negative transmit signal (TX–) for MDI configuration and the negative receive signal (RX–) for MDI-X configuration, respectively. 4 AVDDL P 1.2V analog VDD 5 AVDDL P 1.2V analog VDD 6 NC – No connect Media Dependent Interface[1], positive signal of differential pair 1000Base-T mode: 7 TXRXP_B I/O TXRXP_B corresponds to BI_DB+ for MDI configuration and BI_DA+ for MDI-X configuration, respectively. 10Base-T/100Base-TX mode: TXRXP_B is the positive receive signal (RX+) for MDI configuration and the positive transmit signal (TX+) for MDI-X configuration, respectively. Media Dependent Interface[1], negative signal of differential pair 1000Base-T mode: 8 TXRXM_B I/O TXRXM_B corresponds to BI_DB– for MDI configuration and BI_DA– for MDI-X configuration, respectively. 10Base-T/100Base-TX mode: TXRXM_B is the negative receive signal (RX–) for MDI configuration and the negative transmit signal (TX–) for MDI-X configuration, respectively. 9 AGNDH GND Analog ground Note: 2. P = Power supply. GND = Ground. I = Input. O = Output. I/O = Bi-directional. Ipu = Input with internal pull-up (see Electrical Characteristic for value). Ipu/O = Input with internal pull-up (see Electrical Characteristic for value)/Output. May 14, 2015 10 Revision 2.2 Micrel, Inc. KSZ9031MNX Pin Description (Continued) Pin Number Pin Name Type (2) Pin Function Media Dependent Interface[2], positive signal of differential pair 1000Base-T mode: 10 TXRXP_C I/O TXRXP_C corresponds to BI_DC+ for MDI configuration and BI_DD+ for MDI-X configuration, respectively. 10Base-T/100Base-TX mode: TXRXP_C is not used. Media Dependent Interface[2], negative signal of differential pair 1000Base-T mode: 11 TXRXM_C I/O TXRXM_C corresponds to BI_DC– for MDI configuration and BI_DD– for MDI-X configuration, respectively. 10Base-T/100Base-TX mode: TXRXM_C is not used. 12 AVDDL P 1.2V analog VDD 13 AVDDL P 1.2V analog VDD Media Dependent Interface[3], positive signal of differential pair 1000Base-T mode: 14 TXRXP_D I/O TXRXP_D corresponds to BI_DD+ for MDI configuration and BI_DC+ for MDI-X configuration, respectively. 10Base-T/100Base-TX mode: TXRXP_D is not used. Media Dependent Interface[3], negative signal of differential pair 1000Base-T mode: 15 TXRXM_D I/O TXRXM_D corresponds to BI_DD– for MDI configuration and BI_DC– for MDI-X configuration, respectively. 10Base-T/100Base-TX mode: TXRXM_D is not used. 16 May 14, 2015 AVDDH P 3.3V/2.5V (commercial temp only) analog VDD 11 Revision 2.2 Micrel, Inc. KSZ9031MNX Pin Description (Continued) Pin Number Pin Name Type (2) Pin Function LED2 output: Programmable LED2 output Config mode: The voltage on this pin is sampled and latched during the powerup/reset process to determine the value of PHYAD[1]. See the Strapping Options section for details. The LED2 pin is programmed by the LED_MODE strapping option (Pin 55), and is defined as follows: Single-LED Mode 17 LED2/ PHYAD1 I/O Link Pin State LED Definition Link off H OFF Link on (any speed) L ON Tri-Color Dual-LED Mode Pin State Link/Activity LED Definition LED2 LED1 LED2 LED1 Link off H H OFF OFF 1000 Link / No activity L H ON OFF 1000 Link / Activity (RX, TX) Toggle H Blinking OFF 100 Link / No activity H L OFF ON 100 Link / Activity (RX, TX) H Toggle OFF Blinking 10 Link / No activity L L ON ON 10 Link / Activity (RX, TX) Toggle Toggle Blinking Blinking For tri-color dual-LED mode, LED2 works in conjunction with LED1 (Pin 19) to indicate 10Mbps link and activity. 18 May 14, 2015 DVDDH P 3.3V, 2.5V, or 1.8V digital VDD_IO 12 Revision 2.2 Micrel, Inc. KSZ9031MNX Pin Description (Continued) Pin Number Pin Name Type (2) Pin Function LED1 output: Programmable LED1 output Config mode: The voltage on this pin is sampled and latched during the power-up/reset process to determine the value of PHYAD[0]. See the Strapping Options section for details. PME_N output: Programmable PME_N output (pin option 1). This pin function requires an external pull-up resistor to DVDDH (digital VDD_I/O) in a range from 1.0kΩ to 4.7kΩ. When asserted low, this pin signals that a WOL event has occurred. This pin is not an open-drain for all operating modes. The LED1 pin is programmed by the LED_MODE strapping option (Pin 55), and is defined as follows: Single-LED Mode LED1/ 19 PHYAD0/ I/O Activity Pin State LED Definition No activity H OFF Activity (RX, TX) Toggle Blinking PME_N1 Tri-Color Dual-LED Mode Pin State Link/Activity LED Definition LED2 LED1 LED2 LED1 Link off H H OFF OFF 1000 Link / No activity L H ON OFF 1000 Link / Activity (RX, TX) Toggle H Blinking OFF 100 Link / No activity H L OFF ON 100 Link / Activity (RX, TX) H Toggle OFF Blinking 10 Link / No activity L L ON ON 10 Link / Activity (RX, TX) Toggle Toggle Blinking Blinking For tri-color dual-LED mode, LED1 works in conjunction with LED2 (Pin 17) to indicate 10Mbps link and activity. 20 DVDDL P 21 TXD0 I 22 TXD1 I 23 TXD2 I 24 TXD3 I 25 DVDDL P 26 TXD4 I May 14, 2015 1.2V digital VDD GMII mode: GMII TXD0 (Transmit Data 0) input MII mode: MII TXD0 (Transmit Data 0) input GMII mode: GMII TXD1 (Transmit Data 1) input MII mode: MII TXD1 (Transmit Data 1) input GMII mode: GMII TXD2 (Transmit Data 2) input MII mode: MII TXD2 (Transmit Data 2) Input GMII mode: GMII TXD3 (Transmit Data 3) input MII mode: MII TXD3 (Transmit Data 3) input 1.2V digital VDD GMII mode: GMII TXD4 (Transmit Data 4) input MII mode: This pin is not used and can be driven high or low. 13 Revision 2.2 Micrel, Inc. KSZ9031MNX Pin Description (Continued) Pin Number Pin Name 27 TXD5 I 28 TXD6 I 29 TXD7 I 30 DVDDH P 31 TX_ER Type I (2) Pin Function GMII mode: GMII TXD5 (Transmit Data 5) input MII mode: This pin is not used and can be driven high or low. GMII mode: GMII TXD6 (Transmit Data 6) input MII Mode: This pin is not used and can be driven high or low. GMII mode: GMII TXD7 (Transmit Data 7) input MII mode: This pin is not used and can be driven high or low. 3.3V, 2.5V, or 1.8V digital VDD_IO GMII mode: GMII TX_ER (Transmit Error) input MII mode: MII TX_ER (Transmit Error) input If the GMII/MII MAC does not provide the TX_ER output signal, this pin should be tied low. 32 GTX_CLK I 33 TX_EN I 34 RXD7 O 35 RXD6 O 36 DVDDL P 37 RXD5 O 38 RXD4 O RXD3/ 39 I/O GMII mode: GMII GTX_CLK (Transmit Reference Clock) input GMII mode: GMII TX_EN (Transmit Enable) input MII mode: MII TX_EN (Transmit Enable) input GMII mode: GMII RXD7 (Receive Data 7) output MII mode: This pin is not used and is driven low. GMII mode: GMII RXD6 (Receive Data 6) output MII mode: This pin is not used and is driven low. 1.2V digital VDD GMII mode: GMII RXD5 (Receive Data 5) output MII mode: This pin is not used and is driven low. GMII mode: GMII RXD4 (Receive Data 4) output MII mode: This pin is not used and is driven low. GMII mode: GMII RXD3 (Receive Data 3) output MII mode: MII RXD3 (Receive Data 3) output Config mode: The voltage on this pin is sampled and latched during the powerup/reset process to determine the value of MODE3. See the Strapping Options section for details. MODE3 40 DVDDH P 3.3V, 2.5V, or 1.8V digital VDD_IO GMII mode: RXD2/ 41 I/O MII mode: MII RXD2 (Receive Data 2) output Config mode: The voltage on this pin is sampled and latched during the powerup/reset process to determine the value of MODE2. See the Strapping Options section for details. MODE2 42 DVDDL P 1.2V digital VDD GMII mode: RXD1/ 43 I/O MODE1 May 14, 2015 GMII RXD2 (Receive Data 2) output GMII RXD1 (Receive Data 1) output MII mode: MII RXD1 (Receive Data 1) output Config mode: The voltage on this pin is sampled and latched during the powerup/reset process to determine the value of MODE1. See the Strapping Options section for details. 14 Revision 2.2 Micrel, Inc. KSZ9031MNX Pin Description (Continued) Pin Number Pin Name Type (2) RXD0/ 44 I/O Pin Function GMII mode: GMII RXD0 (Receive Data 0) output MII mode: MII RXD0 (Receive Data 0) output Config mode: The voltage on this pin is sampled and latched during the powerup/reset process to determine the value of MODE0. See the Strapping Options section for details. GMII mode: GMII RX_DV (Receive Data Valid) output MII mode: MII RX_DV (Receive Data Valid) output Config mode: The voltage on this pin is sampled and latched during the powerup/reset process to establish the value of CLK125_EN. See the Strapping Options section for details. MODE0 RX_DV/ 45 I/O CLK125_EN 46 47 DVDDH RX_ER P O RX_CLK/ 48 I/O 3.3V, 2.5V, or 1.8V digital VDD_IO GMII mode: GMII RX_ER (Receive Error) output MII mode: MII RX_ER (Receive Error) output GMII mode: GMII RX_CLK (Receive Reference Clock) output MII mode: MII RX_CLK (Receive Reference Clock) output Config mode: The voltage on this pin is sampled and latched during the power-up/reset process to determine the value of PHYAD[2]. See the Strapping Options section for details. GMII mode: GMII CRS (Carrier Sense) output MII mode: MII CRS (Carrier Sense) output PHYAD2 49 CRS O 50 MDC Ipu 51 MDIO Ipu/O 52 COL O Management data clock input This pin is the input reference clock for MDIO (Pin 51). Management data input/output GMII mode: GMII COL (Collision Detected) output MII mode: MII COL (Collision Detected) output Interrupt output: Programmable interrupt output, with Register 1Bh as the Interrupt Control/Status Register, for programming the interrupt conditions and reading the interrupt status. Register 1Fh, Bit [14] sets the interrupt output to active low (default) or active high. INT_N/ 53 This pin is synchronous to MDC (Pin 50) and requires an external pull-up resistor to DVDDH (digital VDD) in a range from 1.0kΩ to 4.7kΩ. O PME_N2 PME_N output: Programmable PME_N output (pin option 2). When asserted low, this pin signals that a WOL event has occurred. For Interrupt (when active low) and PME functions, this pin requires an external pullup resistor to DVDDH (digital VDD_I/O) in a range from 1.0kΩ to 4.7kΩ. This pin is not an open-drain for all operating modes. 54 DVDDL P 1.2V digital VDD 125MHz clock output CLK125_NDO/ 55 This pin provides a 125MHz reference clock output option for use by the MAC. I/O LED_MODE Config mode: The voltage on this pin is sampled during the power-up/reset process to determine the value of LED_MODE. See the Strapping Options section for details. Chip reset (active low) 56 May 14, 2015 RESET_N Ipu Hardware pin configurations are strapped-in (sampled and latched) at the deassertion (rising edge) of RESET_N. See the Strapping Options section for more details. 15 Revision 2.2 Micrel, Inc. KSZ9031MNX Pin Description (Continued) Pin Number Pin Name 57 TX_CLK Type (2) O Pin Function MII mode: MII TX_CLK (Transmit Reference Clock) output On-chip 1.2V LDO controller output 58 LDO_O O 59 AVDDL_PLL P This pin drives the input gate of a P-channel MOSFET to generate 1.2V for the chip’s core voltages. If the system provides 1.2V and this pin is not used, it can be left floating. 1.2V analog VDD for PLL 25MHz crystal feedback 60 XO O This pin connects to one end of an external 25MHz crystal. This pin is a no connect if an oscillator or other external (non-crystal) clock source is used. Crystal / Oscillator/ External Clock input 61 XI I This pin connects to one end of an external 25MHz crystal or to the output of an oscillator or other external (non-crystal) clock source. 25MHz ±50ppm tolerance No connect 62 NC - 63 ISET I/O 64 AGNDH GND PADDLE May 14, 2015 P_GND GND This pin is not bonded and can be connected to AVDDH power for footprint compatibility with the Micrel KSZ9021GN Gigabit PHY. Set the transmit output level. Connect a 12.1kΩ 1% resistor to ground on this pin. Analog ground. Exposed paddle on bottom of chip. Connect P_GND to ground. 16 Revision 2.2 Micrel, Inc. KSZ9031MNX Strapping Options (3 ) Pin Number Pin Name 48 PHYAD2 I/O 17 PHYAD1 I/O Pull-up = 1 19 PHYAD0 I/O Pull-down = 0 Type Pin Function The PHY address, PHYAD[2:0], is sampled and latched at power-up/reset and is configurable to any value from 0 to 7. Each PHY address bit is configured as follows: PHY Address Bits [4:3] are always set to ‘00’. The MODE[3:0] strap-in pins are sampled and latched at power-up/reset and are defined as follows: MODE[3:0] Mode 0000 Reserved – not used 0001 GMII/MII mode 0010 Reserved – not used 0011 Reserved – not used 0100 NAND tree mode 39 MODE3 I/O 0101 Reserved – not used 41 MODE2 I/O 0110 Reserved – not used 43 MODE1 I/O 0111 Chip power-down mode 44 MODE0 I/O 1000 Reserved – not used 1001 Reserved – not used 1010 Reserved – not used 1011 Reserved – not used 1100 Reserved – not used 1101 Reserved – not used 1110 Reserved – not used 1111 Reserved – not used CLK125_EN is sampled and latched at power-up/reset and is defined as follows: Pull-up (1) = Enable 125MHz clock output 45 CLK125_EN I/O Pull-down (0) = Disable 125MHz clock output Pin 55 (CLK125_NDO) provides the 125MHz reference clock output option for use by the MAC. LED_MODE is sampled and latched at power-up/reset and is defined as follows: 55 LED_MODE I/O Pull-up (1) = Single-LED mode Pull-down (0) = Tri-color dual-LED mode Note: 3. I/O = Bi-directional. Pin strap-ins are latched during power-up or reset. In some systems, the MAC receive input pins may be driven during the power-up or reset process, and consequently cause the PHY strap-in pins on the GMII/MII signals to be latched to the incorrect configuration. In this case, Micrel recommends adding external pull-up or pull-down resistors on the PHY strap-in pins to ensure the PHY is configured to the correct pin strap-in mode. May 14, 2015 17 Revision 2.2 Micrel, Inc. KSZ9031MNX Functional Overview The KSZ9031MNX is a completely integrated triple-speed (10Base-T/100Base-TX/1000Base-T) Ethernet physical layer transceiver solution for transmission and reception of data over a standard CAT-5 unshielded twisted pair (UTP) cable. Its on-chip proprietary 1000Base-T transceiver and Manchester/MLT-3 signaling-based 10Base-T/100Base-TX transceivers are all IEEE 802.3 compliant. The KSZ9031MNX reduces board cost and simplifies board layout by using on-chip termination resistors for the four differential pairs and by integrating an LDO controller to drive a low-cost MOSFET to supply the 1.2V core. On the copper media interface, the KSZ9031MNX can automatically detect and correct for differential pair misplacements and polarity reversals, and correct propagation delays and re-sync timing between the four differential pairs, as specified in the IEEE 802.3 standard for 1000Base-T operation. The KSZ9031MNX provides the GMII/MII interface for connection to GMACs in Gigabit Ethernet processors and switches for data transfer at 10/100/1000Mbps. Figure 1 shows a high-level block diagram of the KSZ9031MNX. Figure 1. KSZ9031MNX Block Diagram May 14, 2015 18 Revision 2.2 Micrel, Inc. KSZ9031MNX Functional Description: 10Base-T/100Base-TX Transceiver 100Base-TX Transmit The 100Base-TX transmit function performs parallel-to-serial conversion, 4B/5B coding, scrambling, NRZ-to-NRZI conversion, and MLT-3 encoding and transmission. The circuitry starts with a parallel-to-serial conversion, which converts the MII data from the MAC into a 125MHz serial bit stream. The data and control stream is then converted into 4B/5B coding, followed by a scrambler. The serialized data is further converted from NRZ-to-NRZI format, and then transmitted in MLT-3 current output. The output current is set by an external 12.1kΩ 1% resistor for the 1:1 transformer ratio. The output signal has a typical rise/fall time of 4ns and complies with the ANSI TP-PMD standard regarding amplitude balance, overshoot, and timing jitter. The wave-shaped 10Base-T output is also incorporated into the 100Base-TX transmitter. 100Base-TX Receive The 100BASE-TX receiver function performs adaptive equalization, DC restoration, MLT-3-to-NRZI conversion, data and clock recovery, NRZI-to-NRZ conversion, de-scrambling, 4B/5B decoding, and serial-to-parallel conversion. The receiving side starts with the equalization filter to compensate for inter-symbol interference (ISI) over the twisted pair cable. Because the amplitude loss and phase distortion are a function of the cable length, the equalizer must adjust its characteristics to optimize performance. In this design, the variable equalizer makes an initial estimation based on comparisons of incoming signal strength against some known cable characteristics, then tunes itself for optimization. This is an ongoing process and self-adjusts against environmental changes such as temperature variations. Next, the equalized signal goes through a DC-restoration and data-conversion block. The DC-restoration circuit compensates for the effect of baseline wander and improves the dynamic range. The differential data conversion circuit converts the MLT-3 format back to NRZI. The slicing threshold is also adaptive. The clock-recovery circuit extracts the 125MHz clock from the edges of the NRZI signal. This recovered clock is then used to convert the NRZI signal into the NRZ format. This signal is sent through the de-scrambler followed by the 4B/5B decoder. Finally, the NRZ serial data is converted to the GMII/MII format and provided as the input data to the MAC. Scrambler/De-Scrambler (100Base-TX only) The purpose of the scrambler is to spread the power spectrum of the signal to reduce electromagnetic interference (EMI) and baseline wander. Transmitted data is scrambled using an 11-bit wide linear feedback shift register (LFSR). The scrambler generates a 2047-bit non-repetitive sequence, then the receiver de-scrambles the incoming data stream using the same sequence as at the transmitter. 10Base-T Transmit The 10Base-T output drivers are incorporated into the 100Base-TX drivers to allow for transmission with the same magnetic. The drivers perform internal wave-shaping and pre-emphasis, and output signals with typical amplitude of 2.5V peak for standard 10Base-T mode and 1.75V peak for energy-efficient 10Base-Te mode. The 10Base-T/10Base-Te signals have harmonic contents that are at least 31dB below the fundamental frequency when driven by an all-ones Manchester-encoded signal. 10Base-T Receive On the receive side, input buffer and level-detecting squelch circuits are used. A differential input receiver circuit and a phase-locked loop (PLL) perform the decoding function. The Manchester-encoded data stream is separated into clock signal and NRZ data. A squelch circuit rejects signals with levels less than 300mV or with short pulse widths to prevent noises at the receive inputs from falsely triggering the decoder. When the input exceeds the squelch limit, the PLL locks onto the incoming signal and the KSZ9031MNX decodes a data frame. The receiver clock is maintained active during idle periods between receiving data frames. The KSZ9031MNX removes all 7 bytes of the preamble and presents the received frame starting with the SFD (start of frame delimiter) to the MAC. May 14, 2015 19 Revision 2.2 Micrel, Inc. KSZ9031MNX Auto-polarity correction is provided for the receive differential pair to automatically swap and fix the incorrect +/– polarity wiring in the cabling. Functional Description: 1000Base-T Transceiver The 1000Base-T transceiver is based-on a mixed-signal/digital-signal processing (DSP) architecture, which includes the analog front-end, digital channel equalizers, trellis encoders/decoders, echo cancellers, cross-talk cancellers, precision clock recovery scheme, and power-efficient line drivers. Figure 2 shows a high-level block diagram of a single channel of the 1000Base-T transceiver for one of the four differential pairs. Figure 2. KSZ9031MNX 1000Base-T Block Diagram – Single Channel Analog Echo-Cancellation Circuit In 1000Base-T mode, the analog echo-cancellation circuit helps to reduce the near-end echo. This analog hybrid circuit relieves the burden of the ADC and the adaptive equalizer. This circuit is disabled in 10Base-T/100Base-TX mode. Automatic Gain Control (AGC) In 1000Base-T mode, the automatic gain control (AGC) circuit provides initial gain adjustment to boost up the signal level. This pre-conditioning circuit is used to improve the signal-to-noise ratio of the receive signal. May 14, 2015 20 Revision 2.2 Micrel, Inc. KSZ9031MNX Analog-to-Digital Converter (ADC) In 1000Base-T mode, the analog-to-digital converter (ADC) digitizes the incoming signal. ADC performance is essential to the overall performance of the transceiver. This circuit is disabled in 10Base-T/100Base-TX mode. Timing Recovery Circuit In 1000Base-T mode, the mixed-signal clock recovery circuit together with the digital phase-locked loop is used to recover and track the incoming timing information from the received data. The digital phase-locked loop has very low long-term jitter to maximize the signal-to-noise ratio of the receive signal. The 1000Base-T slave PHY must transmit the exact receive clock frequency recovered from the received data back to the 1000Base-T master PHY. Otherwise, the master and slave will not be synchronized after long transmission. This also helps to facilitate echo cancellation and NEXT removal. Adaptive Equalizer In 1000Base-T mode, the adaptive equalizer provides the following functions: • • • Detection for partial response signaling Removal of NEXT and ECHO noise Channel equalization Signal quality is degraded by residual echo that is not removed by the analog hybrid because of impedance mismatch. The KSZ9031MNX uses a digital echo canceller to further reduce echo components on the receive signal. In 1000Base-T mode, data transmission and reception occurs simultaneously on all four pairs of wires (four channels). This results in high-frequency cross-talk coming from adjacent wires. The KSZ9031MNX uses three NEXT cancellers on each receive channel to minimize the cross-talk induced by the other three channels. In 10Base-T/100Base-TX mode, the adaptive equalizer needs only to remove the inter-symbol interference and recover the channel loss from the incoming data. Trellis Encoder and Decoder In 1000Base-T mode, the transmitted 8-bit data is scrambled into 9-bit symbols and further encoded into 4D-PAM5 symbols. The initial scrambler seed is determined by the specific PHY address to reduce EMI when more than one KSZ9031MNX is used on the same board. On the receiving side, the idle stream is examined first. The scrambler seed, pair skew, pair order, and polarity must be resolved through the logic. The incoming 4D-PAM5 data is then converted into 9-bit symbols and de-scrambled into 8-bit data. May 14, 2015 21 Revision 2.2 Micrel, Inc. KSZ9031MNX Functional Description: Additional 10/100/1000 PHY Features The Automatic MDI/MDI-X feature eliminates the need to determine whether to use a straight cable or a crossover cable between the KSZ9031MNX and its link partner. This auto-sense function detects the MDI/MDI-X pair mapping from the link partner, and assigns the MDI/MDI-X pair mapping of the KSZ9031MNX accordingly. Table 1 shows the KSZ9031MNX 10/100/1000 pin configuration assignments for MDI/MDI-X pin mapping. Table 1. MDI/MDI-X Pin Mapping Pin (RJ-45 pair) 1000Base-T MDI 100Base-TX MDI-X 10Base-T 1000Base-T 100Base-TX 10Base-T TXRXP/M_A (1,2) A+/– TX+/– TX+/– B+/– RX+/– RX+/– TXRXP/M_B (3,6) B+/– RX+/– RX+/– A+/– TX+/– TX+/– TXRXP/M_C (4,5) C+/– Not used Not used D+/– Not used Not used TXRXP/M_D (7,8) D+/– Not used Not used C+/– Not used Not used Auto MDI/MDI-X is enabled by default. It is disabled by writing a one to Register 1Ch, Bit [6]. MDI and MDI-X mode is set by Register 1Ch, Bit [7] if Auto MDI/MDI-X is disabled. An isolation transformer with symmetrical transmit and receive data paths is recommended to support Auto MDI/MDI-X. Pair-Swap, Alignment, and Polarity Check In 1000Base-T mode, the KSZ9031MNX • • Detects incorrect channel order and automatically restores the pair order for the A, B, C, D pairs (four channels) Supports 50±10ns difference in propagation delay between pairs of channels in accordance with the IEEE 802.3 standard, and automatically corrects the data skew so the corrected four pairs of data symbols are synchronized Incorrect pair polarities of the differential signals are automatically corrected for all speeds. Wave Shaping, Slew-Rate Control, and Partial Response In communication systems, signal transmission encoding methods are used to provide the noise-shaping feature and to minimize distortion and error in the transmission channel. • • • For 1000Base-T, a special partial-response signaling method is used to provide the band-limiting feature for the transmission path. For 100Base-TX, a simple slew-rate control method is used to minimize EMI. For 10Base-T, pre-emphasis is used to extend the signal quality through the cable. PLL Clock Synthesizer The KSZ9031MNX generates 125MHz, 25MHz, and 10MHz clocks for system timing. Internal clocks are generated from the external 25MHz crystal or reference clock. May 14, 2015 22 Revision 2.2 Micrel, Inc. KSZ9031MNX Auto-Negotiation The KSZ9031MNX conforms to the auto-negotiation protocol, defined in Clause 28 of the IEEE 802.3 Specification. Auto-negotiation allows UTP (unshielded twisted pair) link partners to select the highest common mode of operation. During auto-negotiation, link partners advertise capabilities across the UTP link to each other, and then compare their own capabilities with those they received from their link partners. The highest speed and duplex setting that is common to the two link partners is selected as the operating mode. The following list shows the speed and duplex operation mode from highest-to-lowest: • • • • • • Priority 1: Priority 2: Priority 3: Priority 4: Priority 5: Priority 6: 1000Base-T, full-duplex 1000Base-T, half-duplex 100Base-TX, full-duplex 100Base-TX, half-duplex 10Base-T, full-duplex 10Base-T, half-duplex If auto-negotiation is not supported or the KSZ9031MNX link partner is forced to bypass auto-negotiation for 10Base-T and 100Base-TX modes, the KSZ9031MNX sets its operating mode by observing the input signal at its receiver. This is known as parallel detection, and allows the KSZ9031MNX to establish a link by listening for a fixed signal protocol in the absence of the auto-negotiation advertisement protocol. The auto-negotiation link-up process is shown in Figure 3. Figure 3. Auto-Negotiation Flow Chart May 14, 2015 23 Revision 2.2 Micrel, Inc. KSZ9031MNX For 1000Base-T mode, auto-negotiation is required and always used to establish a link. During 1000Base-T autonegotiation, the master and slave configuration is first resolved between link partners. Then the link is established with the highest common capabilities between link partners. Auto-negotiation is enabled by default after power-up or hardware reset. After that, auto-negotiation can be enabled or disabled through Register 0h, Bit [12]. If auto-negotiation is disabled, the speed is set by Register 0h, Bits [6, 13] and the duplex is set by Register 0h, Bit [8]. If the speed is changed on the fly, the link goes down and either auto-negotiation or parallel detection initiates until a common speed between KSZ9031MNX and its link partner is re-established for a link. If the link is already established and there is no change of speed on the fly, the changes (for example, duplex and pause capabilities) will not take effect unless either auto-negotiation is restarted through Register 0h, Bit [9], or a link-down to link-up transition occurs (that is, disconnecting and reconnecting the cable). After auto-negotiation is completed, the link status is updated in Register 1h, Bit [2], and the link partner capabilities are updated in Registers 5h, 6h, and Ah. The auto-negotiation finite state machines use interval timers to manage the auto-negotiation process. The duration of these timers under normal operating conditions is summarized in Table 2. Table 2. Auto-Negotiation Timers Auto-Negotiation Interval Timers Time Duration Transmit burst interval 16ms Transmit pulse interval 68µs FLP detect minimum time 17.2µs FLP detect maximum time 185µs Receive minimum burst interval 6.8ms Receive maximum burst interval 112ms Data detect minimum interval 35.4µs Data detect maximum interval 95µs NLP test minimum interval 4.5ms NLP test maximum interval 30ms Link loss time 52ms Break link time 1480ms Parallel detection wait time 830ms Link enable wait time 1000ms 10/100Mbps Speeds only Some applications require link-up to be limited to 10/100Mbps speeds only. After power-up/reset, the KSZ9031MNX can be restricted to auto-negotiate and link-up to 10/100Mbps speeds only by programming the following register settings: 1. Set Register 0h, Bit [6] = ‘0’ to remove 1000Mbps speed. 2. Set Register 9h, Bits [9:8] = ‘00’ to remove Auto-Negotiation Advertisements for 1000Mbps full/half duplex. 3. Write a ‘1’ to Register 0h, Bit [9], a self-clearing bit, to force a restart of Auto-Negotiation. Auto-Negotiation and 10Base-T/100Base-TX speeds use only differential pairs A (pins 2, 3) and B (pins 7, 8). Differential pairs C (pins 10, 11) and D (pins 14, 15) can be left as no connects. May 14, 2015 24 Revision 2.2 Micrel, Inc. KSZ9031MNX GMII Interface The Gigabit Media Independent Interface (GMII) is compliant to the IEEE 802.3 Specification. It provides a common interface between GMII PHYs and MACs, and has the following key characteristics: • • • • Pin count is 24 pins (11 pins for data transmission, 11 pins for data reception, and 2 pins for carrier and collision indication). 1000Mbps is supported at both half and full duplex. Data transmission and reception are independent and belong to separate signal groups. Transmit data and receive data are each 8 bits wide, a byte. In GMII operation, the GMII pins function as follows: • • • • • The MAC sources the transmit reference clock, GTX_CLK, at 125MHz for 1000Mbps. The PHY recovers and sources the receive reference clock, RX_CLK, at 125MHz for 1000Mbps. TX_EN, TXD[7:0], and TX_ER are sampled by the KSZ9031MNX on the rising edge of GTX_CLK. RX_DV, RXD[7:0], and RX_ER are sampled by the MAC on the rising edge of RX_CLK. CRS and COL are driven by the KSZ9031MNX and do not have to transition synchronously with respect to either GTX_CLK or RX_CLK. The KSZ9031MNX combines GMII mode with MII mode to form GMII/MII mode to support data transfer at 10/100/1000Mbps. After power-up or reset, the KSZ9031MNX is configured to GMII/MII mode if the MODE[3:0] strap-in pins are set to ‘0001’. See the Strapping Options section. The KSZ9031MNX has the option to output a 125MHz reference clock on CLK125_NDO (Pin 55). This clock provides a lower-cost reference clock alternative for GMII/MII MACs that require a 125MHz crystal or oscillator. The 125MHz clock output is enabled after power-up or reset if the CLK125_EN strap-in pin is pulled high. The KSZ9031MNX provides a dedicated transmit clock input pin for GMII mode, defined as follows: • GTX_CLK (input, Pin 32): May 14, 2015 Sourced by MAC in GMII mode for 1000Mbps speed 25 Revision 2.2 Micrel, Inc. KSZ9031MNX GMII Signal Definition Table 3 describes the GMII signals. Refer to Clause 35 of the IEEE 802.3 Specification for more detailed information. Table 3. GMII Signal Definition GMII GMII Signal Name Signal Name (per spec) (per KSZ9031MNX) GTX_CLK GTX_CLK Pin Type (with respect to PHY) Pin Type (with respect to MAC) Description Input Output Transmit Reference Clock (125MHz for 1000Mbps) TX_EN TX_EN Input Output Transmit Enable TXD[7:0] TXD[7:0] Input Output Transmit Data[7:0] TX_ER TX_ER Input Output Transmit Error RX_CLK RX_CLK Output Input Receive Reference Clock RX_DV RX_DV Output Input Receive Data Valid RXD[7:0] RXD[7:0] Output Input Receive Data[7:0] RX_ER RX_ER Output Input Receive Error CRS CRS Output Input Carrier Sense COL COL Output Input Collision Detected (125MHz for 1000Mbps) GMII Signal Diagram The KSZ9031MNX GMII pin connections to the MAC are shown in Figure 4. Figure 4. KSZ9031MNX GMII Interface May 14, 2015 26 Revision 2.2 Micrel, Inc. KSZ9031MNX MII Interface The Media Independent Interface (MII) is compliant with the IEEE 802.3 Specification. It provides a common interface between MII PHYs and MACs, and has the following key characteristics: • • • • Pin count is 16 pins (7 pins for data transmission, 7 pins for data reception, and 2 pins for carrier and collision indication). 10Mbps and 100Mbps are supported at both half- and full-duplex. Data transmission and reception are independent and belong to separate signal groups. Transmit data and receive data are each 4 bits wide, a nibble. In MII operation, the MII pins function as follows: • • • • • The PHY sources the transmit reference clock, TX_CLK, at 25MHz for 100Mbps and 2.5MHz for 10Mbps. The PHY recovers and sources the receive reference clock, RX_CLK, at 25MHz for 100Mbps and 2.5MHz for 10Mbps. TX_EN, TXD[3:0], and TX_ER are driven by the MAC and transition synchronously with respect to TX_CLK. RX_DV, RXD[3:0], and RX_ER are driven by the KSZ9031MNX and transition synchronously with respect to RX_CLK. CRS and COL are driven by the KSZ9031MNX and do not have to transition synchronously with respect to either TX_CLK or RX_CLK. The KSZ9031MNX combines GMII mode with MII mode to form GMII/MII mode to support data transfer at 10/100/1000Mbps. After the power-up or reset, the KSZ9031MNX is then configured to GMII/MII mode if the MODE[3:0] strap-in pins are set to ‘0001’. See the Strapping Options section. The KSZ9031MNX has the option to output a 125MHz reference clock on CLK125_NDO (Pin 55). This clock provides a lower-cost reference clock alternative for GMII/MII MACs that require a 125MHz crystal or oscillator. The 125MHz clock output is enabled after power-up or reset if the CLK125_EN strap-in pin is pulled high. The KSZ9031MNX provides a dedicated transmit clock output pin for MII mode, defined as follows: • TX_CLK (output, Pin 57) : Sourced by KSZ9031MNX in MII mode for 10/100Mbps speed May 14, 2015 27 Revision 2.2 Micrel, Inc. KSZ9031MNX MII Signal Definition Table 4 describes the MII signals. Refer to Clause 22 of the IEEE 802.3 Specification for detailed information. Table 4. MII Signal Definition MII MII Signal Name Signal Name (per spec.) (per KSZ9031MNX) Pin Type (with respect to PHY) Pin Type (with respect to MAC) Description Transmit Reference Clock TX_CLK TX_CLK Output Input TX_EN TX_EN Input Output Transmit Enable TXD[3:0] TXD[3:0] Input Output Transmit Data[3:0] TX_ER TX_ER Input Output Transmit Error RX_CLK RX_CLK Output Input RX_DV RX_DV Output Input Receive Data Valid RXD[3:0] RXD[3:0] Output Input Receive Data[3:0] RX_ER RX_ER Output Input Receive Error CRS CRS Output Input Carrier Sense COL COL Output Input Collision Detected (25MHz for 100Mbps, 2.5MHz for 10Mbps) Receive Reference Clock (25MHz for 100Mbps, 2.5MHz for 10Mbps) MII Signal Diagram The KSZ9031MNX MII pin connections to the MAC are shown in Figure 5. Figure 5. KSZ9031MNX MII Interface May 14, 2015 28 Revision 2.2 Micrel, Inc. KSZ9031MNX MII Management (MIIM) Interface The KSZ9031MNX supports the IEEE 802.3 MII management interface, also known as the Management Data Input/ Output (MDIO) interface. This interface allows upper-layer devices to monitor and control the state of the KSZ9031MNX. An external device with MIIM capability is used to read the PHY status and/or configure the PHY settings. More details about the MIIM interface can be found in Clause 22.2.4 of the IEEE 802.3 Specification. The MIIM interface consists of the following: • • • A physical connection that incorporates the clock line (MDC) and the data line (MDIO). A specific protocol that operates across the physical connection mentioned earlier, which allows an external controller to communicate with one or more KSZ9031MNX devices. Each KSZ9031MNX device is assigned a unique PHY address between 0h and 7h by the PHYAD[2:0] strapping pins. A 32-register address space for direct access to IEEE-defined registers and vendor-specific registers, and for indirect access to MMD addresses and registers. See the Register Map section. PHY Address 0h is supported as the unique PHY address only; it is not supported as the broadcast PHY address, which allows for a single write command to simultaneously program an identical PHY register for two or more PHY devices (for example, using PHY Address 0h to set Register 0h to a value of 0x1940 to set Bit [11] to a value of one to enable software power-down). Instead, separate write commands are used to program each PHY device. Table 5 shows the MII management frame format for the KSZ9031MNX. Table 5. MII Management Frame Format for the KSZ9031MNX PHY REG Start of Read/Write Preamble Address Address Frame OP Code Bits [4:0] Bits [4:0] TA Data Bits [15:0] Idle Read 32 1’s 01 10 00AAA RRRRR Z0 DDDDDDDD_DDDDDDDD Z Write 32 1’s 01 01 00AAA RRRRR 10 DDDDDDDD_DDDDDDDD Z May 14, 2015 29 Revision 2.2 Micrel, Inc. KSZ9031MNX Interrupt (INT_N) The INT_N pin is an optional interrupt signal that is used to inform the external controller that there has been a status update in the KSZ9031MNX PHY register. Bits [15:8] of Register 1Bh are the interrupt control bits that enable and disable the conditions for asserting the INT_N signal. Bits [7:0] of Register 1Bh are the interrupt status bits that indicate which interrupt conditions have occurred. The interrupt status bits are cleared after reading Register 1Bh. Bit [14] of Register 1Fh sets the interrupt level to active high or active low. The default is active low. The MII management bus option gives the MAC processor complete access to the KSZ9031MNX control and status registers. Additionally, an interrupt pin eliminates the need for the processor to poll the PHY for status change. LED Mode The KSZ9031MNX provides two programmable LED output pins, LED2 and LED1, which are configurable to support two LED modes. The LED mode is configured by the LED_MODE strap-in (Pin 55). It is latched at power-up/reset and is defined as follows: • • Pull-up: Single-LED mode Pull-down: Tri-color dual-LED mode Single-LED Mode In single-LED mode, the LED2 pin indicates the link status while the LED1 pin indicates the activity status, as shown in Table 6. Table 6. Single-LED Mode – Pin Definition LED Pin Pin State LED Definition H OFF Link off LED2 LED1 Link/Activity L ON Link on (any speed) H OFF No activity Toggle Blinking Activity (RX, TX) Tri-Color Dual-LED Mode In tri-color dual-LED mode, the link and activity status are indicated by the LED2 pin for 1000Base-T; by the LED1 pin for 100Base-TX; and by both LED2 and LED1 pins, working in conjunction, for 10Base-T. This is summarized in Table 7. Table 7. Tri-Color Dual-LED Mode – Pin Definition LED Pin (State) LED Pin (Definition) Link/Activity LED2 LED1 LED2 LED1 H H OFF OFF Link off L H ON OFF 1000 Link / No activity Toggle H Blinking OFF 1000 Link / Activity (RX, TX) H L OFF ON 100 Link / No activity H Toggle OFF Blinking L L ON ON Toggle Toggle Blinking Blinking 100 Link / Activity (RX, TX) 10 Link / No activity 10 Link / Activity (RX, TX) Each LED output pin can directly drive an LED with a series resistor (typically 220Ω to 470Ω). May 14, 2015 30 Revision 2.2 Micrel, Inc. KSZ9031MNX Loopback Mode The KSZ9031MNX supports the following loopback operations to verify analog and/or digital data paths. • • Local (digital) loopback Remote (analog) loopback Local (Digital) Loopback This loopback mode checks the GMII/MII transmit and receive data paths between KSZ9031MNX and external MAC, and is supported for all three speeds (10/100/1000Mbps) at full-duplex. The loopback data path is shown in Figure 6. 1. GMII/MII MAC transmits frames to KSZ9031MNX. 2. Frames are wrapped around inside KSZ9031MNX. 3. KSZ9031MNX transmits frames back to GMII/MII MAC. Figure 6. Local (Digital) Loopback The following programming steps and register settings are used for local loopback mode. For 1000Mbps loopback, 1. Set Register 0h, - Bit [14] = 1 - Bits [6, 13] = 10 - Bit [12] = 0 - Bit [8] = 1 2. Set Register 9h, - Bit [12] = 1 - Bit [11] = 0 // Enable master-slave manual configuration // Select slave configuration (required for loopback mode) For 10/100Mbps loopback, 1. Set Register 0h, - Bit [14] = 1 - Bits [6, 13] = 00 / 01 - Bit [12] = 0 - Bit [8] = 1 // Enable local loopback mode // Select 10Mbps/100Mbps speed // Disable auto-negotiation // Select full-duplex mode May 14, 2015 // Enable local loopback mode // Select 1000Mbps speed // Disable auto-negotiation // Select full-duplex mode 31 Revision 2.2 Micrel, Inc. KSZ9031MNX Remote (Analog) Loopback This loopback mode checks the line (differential pairs, transformer, RJ-45 connector, Ethernet cable) transmit and receive data paths between KSZ9031MNX and its link partner, and is supported for 1000Base-T full-duplex mode only. The loopback data path is shown in Figure 7. 1. The Gigabit PHY link partner transmits frames to KSZ9031MNX. 2. Frames are wrapped around inside KSZ9031MNX. 3. KSZ9031MNX transmits frames back to the Gigabit PHY link partner. Figure 7. Remote (Analog) Loopback The following programming steps and register settings are used for remote loopback mode. 1. Set Register 0h, • Bits [6, 13] = 10 • Bit [12] = 0 • Bit [8] = 1 // Select 1000Mbps speed // Disable auto-negotiation // Select full-duplex mode Or just auto-negotiate and link up at 1000Base-T full-duplex mode with the link partner. 2. Set Register 11h, • Bit [8] = 1 May 14, 2015 // Enable remote loopback mode 32 Revision 2.2 Micrel, Inc. KSZ9031MNX LinkMD® Cable Diagnostic The LinkMD function uses time domain reflectometry (TDR) to analyze the cabling plant for common cabling problems, such as open circuits, short circuits, and impedance mismatches. LinkMD operates by sending a pulse of known amplitude and duration down the selected differential pair, then analyzing the polarity and shape of the reflected signal to determine the type of fault: open circuit for a positive/non-inverted amplitude reflection and short circuit for a negative/inverted amplitude reflection. The time duration for the reflected signal to return provides the approximate distance to the cabling fault. The LinkMD function processes this TDR information and presents it as a numerical value that can be translated to a cable distance. LinkMD is initiated by accessing Register 12h, the LinkMD – Cable Diagnostic register, in conjunction with Register 1Ch, the Auto MDI/MDI-X register. The latter register is needed to disable the Auto MDI/MDI-X function before running the LinkMD test. Additionally, a software reset (Reg. 0h, Bit [15] = 1) should be performed before and after running the LinkMD test. The reset helps to ensure the KSZ9031MNX is in the normal operating state before and after the test. NAND Tree Support The KSZ9031MNX provides parametric NAND tree support for fault detection between chip I/Os and board. NAND tree mode is enabled at power-up/reset with the MODE[3:0] strap-in pins set to ‘0100’. Table 8 lists the NAND tree pin order. Table 8. NAND Tree Test Pin Order for KSZ9031MNX Pin May 14, 2015 Description LED2 Input LED1/PME_N1 Input TXD0 Input TXD1 Input TXD2 Input TXD3 Input TX_ER Input GTX_CLK Input TX_EN Input RX_DV Input RX_ER Input RX_CLK Input CRS Input COL Input INT_N/PME_N2 Input MDC Input MDIO Input CLK125_NDO Output 33 Revision 2.2 Micrel, Inc. KSZ9031MNX Power Management The KSZ9031MNX incorporates a number of power-management modes and features that provide methods to consume less energy. These are discussed in the following sections. Energy-Detect Power-Down Mode Energy-detect power-down (EDPD) mode is used to further reduce the transceiver power consumption when the cable is unplugged. It is enabled by writing a one to MMD Address 1Ch, Register 23h, Bit [0], and is in effect when autonegotiation mode is enabled and the cable is disconnected (no link). In EDPD Mode, the KSZ9031MNX shuts down all transceiver blocks, except for the transmitter and energy detect circuits. Power can be reduced further by extending the time interval between the transmissions of link pulses to check for the presence of a link partner. The periodic transmission of link pulses is needed to ensure the KSZ9031MNX and its link partner, when operating in the same low-power state and with Auto MDI/MDI-X disabled, can wake up when the cable is connected between them. By default, EDPD mode is disabled after power-up. Software Power-Down Mode This mode is used to power down the KSZ9031MNX device when it is not in use after power-up. Software power-down (SPD) mode is enabled by writing a one to Register 0h, Bit [11]. In the SPD state, the KSZ9031MNX disables all internal functions, except for the MII management interface. The KSZ9031MNX exits the SPD state after a zero is written to Register 0h, Bit [11]. Chip Power-Down Mode This mode provides the lowest power state for the KSZ9031MNX device when it is mounted on the board but not in use. Chip power-down (CPD) mode is enabled after power-up/reset with the MODE[3:0] strap-in pins set to ‘0111’. The KSZ9031MNX exits CPD mode after a hardware reset is applied to the RESET_N pin (Pin 56) with the MODE[3:0] strapin pins set to an operating mode other than CPD. May 14, 2015 34 Revision 2.2 Micrel, Inc. KSZ9031MNX Energy Efficient Ethernet (EEE) The KSZ9031MNX implements Energy Efficient Ethernet (EEE), as described in IEEE Standard 802.3az. The Standard is defined around an EEE-compliant MAC on the host side and an EEE-compliant link partner on the line side that support the special signaling associated with EEE. EEE saves power by keeping the AC signal on the copper Ethernet cable at approximately 0V peak-to-peak as often as possible during periods of no traffic activity, while maintaining the link-up status. This is referred to as low-power idle (LPI) mode or state. During LPI mode, the copper link responds automatically when it receives traffic and resumes normal PHY operation immediately, without blockage of traffic or loss of packet. This involves exiting LPI mode and returning to normal 100/1000Mbps operating mode. Wake-up times are <16µs for 1000Base-T and <30µs for 100Base-TX. The LPI state is controlled independently for transmit and receive paths, allowing the LPI state to be active (enabled) for: • • • Transmit cable path only Receive cable path only Both transmit and receive cable paths The KSZ9031MNX has the EEE function disabled as the power-up default setting. The EEE function is enabled by setting the following EEE advertisement bits at MMD Address 7h, Register 3Ch, followed by restarting auto-negotiation (writing a ‘1’ to Register 0h, Bit [9]): • • Bit [2] = 1 Bit [1] = 1 // Enable 1000Mbps EEE mode // Enable 100Mbps EEE mode For standard (non-EEE) 10Base-T mode, normal link pulses (NLPs) with long periods of no AC signal transmission are used to maintain the link during the idle period when there is no traffic activity. To save more power, the KSZ9031MNX provides the option to enable 10Base-Te mode, which saves additional power by reducing the transmitted signal amplitude from 2.5V to 1.75V. To enable 10Base-Te mode, write a ‘1’ to MMD Address 1Ch, Register 4h, Bit [10]. During LPI mode, refresh transmissions are used to maintain the link; power savings occur in quiet periods. Approximately every 20 to 22 milliseconds, a refresh transmission of 200 to 220 microseconds is sent to the link partner. The refresh transmissions and quiet periods are shown in Figure 8. Figure 8. LPI Mode (Refresh Transmissions and Quiet Periods) May 14, 2015 35 Revision 2.2 Micrel, Inc. KSZ9031MNX Transmit Direction Control (MAC-to-PHY) The KSZ9031MNX enters LPI mode for the transmit direction when its attached EEE-compliant MAC de-asserts TX_EN, asserts TX_ER, and sets TXD[7:0] to 0000_0001 for GMII (1000Mbps) or TXD[3:0] to 0001’for MII (100Mbps). The KSZ9031MNX remains in the transmit LPI state while the MAC maintains the states of these signals. When the MAC changes any of the TX_EN, TX_ER, or TX data signals from their LPI state values, the KSZ9031MNX exits the LPI transmit state. For GMII (1000Mbps), the GTX_CLK clock can be stopped by the MAC to save additional power, after the GMII signals for the LPI state have been asserted for nine or more GTX_CLK clock cycles. Figure 9 shows the LPI transition for GMII transmit. Figure 9. LPI Transition – GMII (1000Mbps) Transmit For MII (100Mbps), the TX_CLK is not stopped, because it is sourced from the PHY and is used by the MAC for MII transmit. Figure 10 shows the LPI transition for MII transmit. Figure 10. LPI Transition – MII (100Mbps) Transmit May 14, 2015 36 Revision 2.2 Micrel, Inc. KSZ9031MNX Receive Direction Control (PHY-to-MAC) The KSZ9031MNX enters LPI mode for the receive direction when it receives the /P/ code bit pattern (Sleep/Refresh) from its EEE-compliant link partner. It then de-asserts RX_DV, asserts RX_ER, and drives RXD[7:0] to 0000_0001 for GMII (1000Mbps) or RXD[3:0] to 0001 for MII (100Mbps). The KSZ9031MNX remains in the receive LPI state while it continues to receive the refresh from its link partner, so it will continue to maintain and drive the LPI output states for the GMII/MII receive signals to inform the attached EEE-compliant MAC that it is in the receive LPI state. When the KSZ9031MNX receives a non /P/ code bit pattern (non-refresh), it exits the receive LPI state and sets the RX_DV, RX_ER, and RX data signals to set a normal frame or normal idle. For GMII (1000Mbps), the KSZ9031MNX stops the RX_CLK clock output to the MAC after nine or more RX_CLK clock cycles have occurred in the receive LPI state, to save more power. Figure 11 shows the LPI transition for GMII receive. Figure 11. LPI Transition – GMII (1000Mbps) Receive Similarly, for MII (100Mbps), the KSZ9031MNX stops the RX_CLK clock output to the MAC after nine or more RX_CLK clock cycles have occurred in the receive LPI state, to save more power. Figure 12 shows the LPI transition for MII receive. Figure 12. LPI Transition – MII (100Mbps) Receive Registers Associated with EEE The following MMD registers are provided for EEE configuration and management: • • • • MMD Address 3h, Register 0h MMD Address 3h, Register 1h MMD Address 7h, Register 3Ch MMD Address 7h, Register 3Dh May 14, 2015 PCS EEE – Control Register PCS EEE – Status Register - EEE Advertisement Register - EEE Link Partner Advertisement Register 37 Revision 2.2 Micrel, Inc. KSZ9031MNX Wake-On-LAN Wake-On-LAN (WOL) is normally a MAC-based function to wake up a host system (for example, an Ethernet end device, such as a PC) that is in standby power mode. Wake-up is triggered by receiving and detecting a special packet (commonly referred to as the “magic packet”) that is sent by the remote link partner. The KSZ9031MNX can perform the same WOL function if the MAC address of its associated MAC device is entered into the KSZ9031MNX PHY registers for magic-packet detection. When the KSZ9031MNX detects the magic packet, it wakes up the host by driving its power management event (PME) output pin low. By default, the WOL function is disabled. It is enabled by setting the enabling bit and configuring the associated registers for the selected PME wake-up detection method. The KSZ9031MNX provides three methods to trigger a PME wake-up: • • • Magic-packet detection Customized-packet detection Link status change detection Magic-Packet Detection The magic packet’s frame format starts with 6 bytes of 0xFFh and is followed by 16 repetitions of the MAC address of its associated MAC device (local MAC device). When the magic packet is detected from its link partner, the KSZ9031MNX asserts its PME output pin low. The following MMD Address 2h registers are provided for magic-packet detection: • • Magic-packet detection is enabled by writing a ‘1’ to MMD Address 2h, Register 10h, Bit [6] The MAC address (for the local MAC device) is written to and stored in MMD Address 2h, Registers 11h – 13h The KSZ9031MNX does not generate the magic packet. The magic packet must be provided by the external system. Customized-Packet Detection The customized packet has associated register/bit masks to select which byte, or bytes, of the first 64 bytes of the packet to use in the CRC calculation. After the KSZ9031MNX receives the packet from its link partner, the selected bytes for the received packet are used to calculate the CRC. The calculated CRC is compared to the expected CRC value that was previously written to and stored in the KSZ9031MNX PHY registers. If there is a match, the KSZ9031MNX asserts its PME output pin low. Four customized packets are provided to support four types of wake-up scenarios. A dedicated set of registers is used to configure and enable each customized packet. The following MMD registers are provided for customized-packet detection: • • • Each of the four customized packets is enabled via MMD Address 2h, Register 10h, - Bit [2] // For customized packets, type 0 - Bit [3] // For customized packets, type 1 - Bit [4] // For customized packets, type 2 - Bit [5] // For customized packets, type 3 32-bit expected CRCs are written to and stored in: - MMD Address 2h, Registers 14h – 15h // For customized packets, type 0 - MMD Address 2h, Registers 16h – 17h // For customized packets, type 1 - MMD Address 2h, Registers 18h – 19h // For customized packets, type 2 - MMD Address 2h, Registers 1Ah – 1Bh // For customized packets, type 3 Masks to indicate which of the first 64-bytes to use in the CRC calculation are set in: - MMD Address 2h, Registers 1Ch – 1Fh // For customized packets, type 0 - MMD Address 2h, Registers 20h – 23h // For customized packets, type 1 - MMD Address 2h, Registers 24h – 27h // For customized packets, type 2 - MMD Address 2h, Registers 28h – 2Bh // For customized packets, type 3 May 14, 2015 38 Revision 2.2 Micrel, Inc. KSZ9031MNX Link Status Change Detection If link status change detection is enabled, the KSZ9031MNX asserts its PME output pin low whenever there is a link status change using the following MMD Address 2h registers bits and their enabled (1) or disabled (0) settings: • • MMD Address 2h, Register 10h, Bit [0] MMD Address 2h, Register 10h, Bit [1] // For link-up detection // For link-down detection The PME output signal is available on either LED1/PME_N1 (Pin 19) or INT_N/PME_N2 (Pin 53), and is selected and enabled using MMD Address 2h, Register 2h, Bits [8] and [10], respectively. Additionally, MMD Address 2h, Register 10h, Bits [15:14] defines the output functions for Pins 19 and 53. The PME output is active low and requires a 1kΩ pull-up to the VDDIO supply. When asserted, the PME output is cleared by disabling the register bit that enabled the PME trigger source (magic packet, customized packet, link status change). May 14, 2015 39 Revision 2.2 Micrel, Inc. KSZ9031MNX Typical Current/Power Consumption Table 9, Table 10, Table 11, and Table 12 show the typical current consumption by the core (DVDDL, AVDDL, AVDDL_PLL), transceiver (AVDDH) and digital I/O (DVDDH) supply pins, and the total typical power for the entire KSZ9031MNX device for various nominal operating voltage combinations. Table 9. Typical Current/Power Consumption – Transceiver (3.3V), Digital I/Os (3.3V) 1.2V Core 3.3V Transceiver (DVDDL, AVDDL, (AVDDH) Condition AVDDL_PLL) 1000Base-T link-up (no traffic) 3.3V Digital I/Os (DVDDH) Total Chip Power mA mA mA mW 211 66.6 26.0 560 1000Base-T full-duplex @ 100% utilization 221 65.6 53.8 660 100Base-TX link-up (no traffic) 60.6 28.7 13.3 211 100Base-TX full-duplex @ 100% utilization 61.2 28.7 18.0 228 10Base-T link-up (no traffic) 7.0 17.0 5.7 83 10Base-T full-duplex @ 100% utilization 7.7 29.3 11.1 143 EEE Mode – 1000Mbps 41.6 5.5 3.7 80 EEE Mode – 100Mbps (TX and RX in LPI) 25.3 5.2 7.0 71 Software power-down mode (Reg. 0h.11 = 1) 0.9 4.1 7.1 38 1.8V Digital I/Os (DVDDH) Total Chip Power Table 10. Typical Current/Power Consumption – Transceiver (3.3V), Digital I/Os (1.8V) 1.2V Core 3.3V Transceiver (DVDDL, AVDDL, (AVDDH) Condition AVDDL_PLL) mA mA mA mW 1000Base-T link-up (no traffic) 211 66.6 14.2 498 1000Base-T full-duplex @ 100% utilization 221 65.6 29.3 534 100Base-TX link-up (no traffic) 60.6 28.7 7.3 181 100Base-TX full-duplex @ 100% utilization 61.2 28.7 10.0 186 10Base-T link-up (no traffic) 7.0 17.0 3.1 70 10Base-T full-duplex @ 100% utilization 7.7 29.3 6.0 117 EEE Mode – 1000Mbps 41.6 5.5 2.4 72 EEE Mode – 100Mbps (TX and RX in LPI) 25.3 5.2 3.8 54 Software power-down mode (Reg. 0h.11 = 1) 0.9 4.1 3.7 21 May 14, 2015 40 Revision 2.2 Micrel, Inc. KSZ9031MNX Table 11. Typical Current/Power Consumption – Transceiver (2.5V), Digital I/Os (2.5V) 2.5V (4) Transceiver 1.2V Core (AVDDH – (DVDDL, AVDDL, Condition AVDDL_PLL) commercial temp. only) 1000Base-T link-up (no traffic) 2.5V Digital I/Os (DVDDH) Total Chip Power mA mA mA mW 211 58.6 19.3 448 1000Base-T full-duplex @ 100% utilization 221 57.6 40.5 510 100Base-TX link-up (no traffic) 60.6 24.8 10.0 160 100Base-TX full-duplex @ 100% utilization 61.2 24.8 13.7 170 10Base-T link-up (no traffic) 7.0 12.5 4.3 50 10Base-T full-duplex @ 100% utilization 7.7 25.8 8.3 94 EEE Mode – 1000Mbps 41.6 4.4 2.9 68 EEE Mode – 100Mbps (TX and RX in LPI) 25.3 4.0 5.2 53 Software power-down mode (Reg. 0h.11 = 1) 0.9 3.0 5.3 22 1.8V Digital I/Os (DVDDH) Total Chip Power Note: 4. 2.5V AVDDH is recommended for commercial temperature range (0°C to +70°C) operation only. Table 12. Typical Current/Power Consumption – Transceiver (2.5V), Digital I/Os (1.8V) 2.5V (4) Transceiver 1.2V Core (AVDDH – (DVDDL, AVDDL, Condition AVDDL_PLL) commercial temp. only)* mA mA mA mW 1000Base-T link-up (no traffic) 211 58.6 14.2 425 1000Base-T full-duplex @ 100% utilization 221 57.6 29.3 462 100Base-TX link-up (no traffic) 60.6 24.8 7.3 148 100Base-TX full-duplex @ 100% utilization 61.2 24.8 10.0 153 10Base-T link-up (no traffic) 7.0 12.5 3.1 45 10Base-T full-duplex @ 100% utilization 7.7 25.8 6.0 85 EEE Mode – 1000Mbps 41.6 4.4 2.4 65 EEE Mode – 100Mbps (TX and RX in LPI) 25.3 4.0 3.8 47 Software power-down mode (Reg. 0h.11 = 1) 0.9 3.0 3.7 15 May 14, 2015 41 Revision 2.2 Micrel, Inc. KSZ9031MNX Register Map The register space within the KSZ9031MNX consists of two distinct areas. • Standard registers // Direct register access • MDIO manageable device (MMD) registers // Indirect register access The KSZ9031MNX supports the following standard registers. Table 13. Standard Registers Supported by KSZ9031MNX Register Number (Hex) Description IEEE-Defined Registers 0h Basic Control 1h Basic Status 2h PHY Identifier 1 3h PHY Identifier 2 4h Auto-Negotiation Advertisement 5h Auto-Negotiation Link Partner Ability 6h Auto-Negotiation Expansion 7h Auto-Negotiation Next Page 8h Auto-Negotiation Link Partner Next Page Ability 9h 1000Base-T Control Ah 1000Base-T Status Bh – Ch Reserved Dh MMD Access – Control Eh MMD Access – Register/Data Fh Extended Status Vendor-Specific Registers 10h Reserved 11h Remote Loopback 12h LinkMD Cable Diagnostic 13h Digital PMA/PCS Status 14h Reserved 15h 16h – 1Ah RXER Counter Reserved 1Bh Interrupt Control/Status 1Ch Auto MDI/MDI-X 1Dh – 1Eh 1Fh Reserved PHY Control The KSZ9031MNX supports the following MMD device addresses and their associated register addresses, which make up the indirect MMD registers. These can be seen in Table 14. May 14, 2015 42 Revision 2.2 Micrel, Inc. KSZ9031MNX Table 14. MMD Registers Supported by KSZ9031MNX Device Address (Hex) Register Address (Hex) Description 0h 1h 2h May 14, 2015 3h AN FLP Burst Transmit – LO 4h AN FLP Burst Transmit – HI 5Ah 1000Base-T Link-Up Time Control 0h Common Control 1h Strap Status 2h Operation Mode Strap Override 3h Operation Mode Strap Status 4h GMII Control Signal Pad Skew 8h GMII Clock Pad Skew 10h Wake-On-LAN – Control 11h Wake-On-LAN – Magic Packet, MAC-DA-0 12h Wake-On-LAN – Magic Packet, MAC-DA-1 13h Wake-On-LAN – Magic Packet, MAC-DA-2 14h Wake-On-LAN – Customized Packet, Type 0, Expected CRC 0 15h Wake-On-LAN – Customized Packet, Type 0, Expected CRC 1 16h Wake-On-LAN – Customized Packet, Type 1, Expected CRC 0 17h Wake-On-LAN – Customized Packet, Type 1, Expected CRC 1 18h Wake-On-LAN – Customized Packet, Type 2, Expected CRC 0 19h Wake-On-LAN – Customized Packet, Type 2, Expected CRC 1 1Ah Wake-On-LAN – Customized Packet, Type 3, Expected CRC 0 1Bh Wake-On-LAN – Customized Packet, Type 3, Expected CRC 1 1Ch Wake-On-LAN – Customized Packet, Type 0, Mask 0 1Dh Wake-On-LAN – Customized Packet, Type 0, Mask 1 1Eh Wake-On-LAN – Customized Packet, Type 0, Mask 2 1Fh Wake-On-LAN – Customized Packet, Type 0, Mask 3 20h Wake-On-LAN – Customized Packet, Type 1, Mask 0 21h Wake-On-LAN – Customized Packet, Type 1, Mask 1 22h Wake-On-LAN – Customized Packet, Type 1, Mask 2 23h Wake-On-LAN – Customized Packet, Type 1, Mask 3 24h Wake-On-LAN – Customized Packet, Type 2, Mask 0 25h Wake-On-LAN – Customized Packet, Type 2, Mask 1 26h Wake-On-LAN – Customized Packet, Type 2, Mask 2 27h Wake-On-LAN – Customized Packet, Type 2, Mask 3 28h Wake-On-LAN – Customized Packet, Type 3, Mask 0 29h Wake-On-LAN – Customized Packet, Type 3, Mask 1 2Ah Wake-On-LAN – Customized Packet, Type 3, Mask 2 43 Revision 2.2 Micrel, Inc. KSZ9031MNX Table 14. MMD Registers Supported by KSZ9031MNX (Continued) Device Address (Hex) Register Address (Hex) 2h 2Bh 3h 7h 1Ch May 14, 2015 Description Wake-On-LAN – Customized Packet, Type 3, Mask 3 0h PCS EEE – Control 1h PCS EEE – Status 3Ch EEE Advertisement 3Dh EEE Link Partner Advertisement 4h Analog Control 4 23h EDPD Control 44 Revision 2.2 Micrel, Inc. KSZ9031MNX Standard Registers Standard registers provide direct read/write access to a 32-register address space, as defined in Clause 22 of the IEEE 802.3 Specification. Within this address space, the first 16 registers (Registers 0h to Fh) are defined according to the IEEE specification, while the remaining 16 registers (Registers 10h to 1Fh) are defined specific to the PHY vendor. IEEE Defined Registers – Descriptions Address Name (5) Description Mode Default RW/SC 0 RW 0 RW 0 RW 1 RW 0 RW 0 RW/SC 0 Register 0h – Basic Control 1 = Software PHY reset 0.15 Reset 0 = Normal operation This bit is self-cleared after a ‘1’ is written to it. 0.14 Loopback 1 = Loopback mode 0 = Normal operation [0.6, 0.13] [1,1] = Reserved 0.13 Speed Select (LSB) [1,0] = 1000Mbps [0,1] = 100Mbps [0,0] = 10Mbps This bit is ignored if auto-negotiation is enabled (Reg. 0.12 = 1). 1 = Enable auto-negotiation process 0.12 AutoNegotiation Enable 0 = Disable auto-negotiation process If enabled, auto-negotiation result overrides settings in Reg. 0.13, 0.8 and 0.6. If disabled, Auto MDI-X is also automatically disabled. Use Register 1Ch to set MDI/MDI-X. 1 = Power-down mode 0 = Normal operation 0.11 Power-Down When this bit is set to ‘1’, the link-down status might not get updated in the PHY register. Software should note link is down and should not rely on the PHY register link status. After this bit is changed from ‘1’ to ‘0’, an internal global reset is automatically generated. Wait a minimum of 1ms before read/write access to the PHY registers. 0.10 Isolate 0.9 Restart AutoNegotiation 1 = Electrical isolation of PHY from GMII/MII 0 = Normal operation 1 = Restart auto-negotiation process 0 = Normal operation This bit is self-cleared after a ‘1’ is written to it. Note: 5. RW = Read/Write. RO = Read only. SC = Self-cleared. LH = Latch high. LL = Latch low. May 14, 2015 45 Revision 2.2 Micrel, Inc. KSZ9031MNX IEEE Defined Registers – Descriptions (Continued) Address Name 0.8 Duplex Mode 0.7 Collision Test (5) Description 1 = Full-duplex 0 = Half-duplex 1 = Enable COL test 0 = Disable COL test Mode Default RW 1 RW 0 [0.6, 0.13] [1,1] = Reserved 0.6 Speed Select (MSB) [1,0] = 1000Mbps Set by MODE[3:0] strapping pins. [0,1] = 100Mbps RW See the Strapping Options section for details. RO 00_0000 RO 0 RO 1 RO 1 RO 1 RO 1 RO 00 RO 1 RO 0 RO 1 RO 0 RO/LH 0 RO 1 RO/LL 0 RO/LH 0 RO 1 [0,0] = 10Mbps This bit is ignored if auto-negotiation is enabled (Reg. 0.12 = 1). 0.5:0 Reserved Reserved Register 1h – Basic Status 1 = T4 capable 1.15 100Base-T4 1.14 100Base-TX Full-Duplex 1.13 100Base-TX Half-Duplex 1 = Capable of 100Mbps half-duplex 1.12 10Base-T Full-Duplex 1 = Capable of 10Mbps full-duplex 1.11 10Base-T Half-Duplex 1 = Capable of 10Mbps half-duplex 1.10:9 Reserved Reserved 1.8 Extended Status 1 = Extended status info in Reg. 15h. 1.7 Reserved Reserved 1.6 No Preamble 1.5 AutoNegotiation Complete 1.4 Remote Fault 1.3 AutoNegotiation Ability 1.2 Link Status 1.1 Jabber Detect 1.0 Extended Capability May 14, 2015 0 = Not T4 capable 1 = Capable of 100Mbps full-duplex 0 = Not capable of 100Mbps full-duplex 0 = Not capable of 100Mbps half-duplex 0 = Not capable of 10Mbps full-duplex 0 = Not capable of 10Mbps half-duplex 0 = No extended status info in Reg. 15h. 1 = Preamble suppression 0 = Normal preamble 1 = Auto-negotiation process completed 0 = Auto-negotiation process not completed 1 = Remote fault 0 = No remote fault 1 = Can perform auto-negotiation 0 = Cannot perform auto-negotiation 1 = Link is up 0 = Link is down 1 = Jabber detected 0 = Jabber not detected (default is low) 1 = Supports extended capability registers 46 Revision 2.2 Micrel, Inc. KSZ9031MNX IEEE Defined Registers – Descriptions (Continued) Address Name (5) Description Mode Default Assigned to the 3rd through 18th bits of the organizationally unique identifier (OUI). KENDIN Communication’s OUI is 0010A1h. RO 0022h Register 2h – PHY Identifier 1 2.15:0 PHY ID Number Register 3h – PHY Identifier 2 3.15:10 PHY ID Number Assigned to the 19th through 24th bits of the organizationally unique identifier (OUI). KENDIN Communication’s OUI is 0010A1h. RO 0001_01 3.9:4 Model Number Six-bit manufacturer’s model number RO 10_0010 3.3:0 Revision Number Four-bit manufacturer’s revision number RO Indicates silicon revision RW 0 RO 0 RW 0 RO 0 RW 00 RO 0 RW 1 RW 1 RW 1 RW 1 RW 0_0001 RO 0 RO 0 RO 0 RO 0 Register 4h – Auto-Negotiation Advertisement 4.15 Next Page 4.14 Reserved 4.13 Remote Fault 4.12 Reserved 1 = Next page capable 0 = No next page capability Reserved 1 = Remote fault supported 0 = No remote fault Reserved [4.11, 4.10] [0,0] = No pause 4.11:10 Pause [1,0] = Asymmetric pause (link partner) [0,1] = Symmetric pause [1,1] = Symmetric and asymmetric pause (local device) 1 = T4 capable 4.9 100Base-T4 4.8 100Base-TX Full-Duplex 4.7 100Base-TX Half-Duplex 1 = 100Mbps half-duplex capable 4.6 10Base-T Full-Duplex 1 = 10Mbps full-duplex capable 4.5 10Base-T Half-Duplex 1 = 10Mbps half-duplex capable 4.4:0 Selector Field [00001] = IEEE 802.3 0 = No T4 capability 1 = 100Mbps full-duplex capable 0 = No 100Mbps full-duplex capability 0 = No 100Mbps half-duplex capability 0 = No 10Mbps full-duplex capability 0 = No 10Mbps half-duplex capability Register 5h – Auto-Negotiation Link Partner Ability 5.15 Next Page 5.14 Acknowledge 5.13 Remote Fault 5.12 Reserved May 14, 2015 1 = Next page capable 0 = No next page capability 1 = Link code word received from partner 0 = Link code word not yet received 1 = Remote fault detected 0 = No remote fault Reserved 47 Revision 2.2 Micrel, Inc. KSZ9031MNX IEEE Defined Registers – Descriptions (Continued) Address Name (5) Description Mode Default RW 00 RO 0 RO 0 RO 0 RO 0 RO 0 RO 0_0000 RO 0000_0000_000 RO/LH 0 RO 0 RO 1 RO/LH 0 RO 0 RW 0 RO 0 RW 1 RW 0 [5.11, 5.10] [0,0] = No pause 5.11:10 Pause [1,0] = Asymmetric Pause (link partner) [0,1] = Symmetric pause [1,1] = Symmetric and asymmetric pause (local device) 1 = T4 capable 5.9 100Base-T4 5.8 100Base-TX Full-Duplex 5.7 100Base-TX Half-Duplex 1 = 100Mbps half-duplex capable 5.6 10Base-T Full-Duplex 1 = 10Mbps full-duplex capable 5.5 10Base-T Half-Duplex 1 = 10Mbps half-duplex capable 5.4:0 Selector Field [00001] = IEEE 802.3 0 = No T4 capability 1 = 100Mbps full-duplex capable 0 = No 100Mbps full-duplex capability 0 = No 100Mbps half-duplex capability 0 = No 10Mbps full-duplex capability 0 = No 10Mbps half-duplex capability Register 6h – Auto-Negotiation Expansion 6.15:5 Reserved Reserved 6.4 Parallel Detection Fault 1 = Fault detected by parallel detection Link Partner Next Page Able 1 = Link partner has next page capability 6.3 6.2 Next Page Able 6.1 Page Received 6.0 Link Partner AutoNegotiation Able 0 = No fault detected by parallel detection 0 = Link partner does not have next page capability 1 = Local device has next page capability 0 = Local device does not have next page capability 1 = New page received 0 = New page not received 1 = Link partner has auto-negotiation capability 0 = Link partner does not have auto-negotiation capability Register 7h – Auto-Negotiation Next Page 7.15 Next Page 7.14 Reserved 7.13 Message Page 7.12 Acknowledge2 May 14, 2015 1 = Additional next pages will follow 0 = Last page Reserved 1 = Message page 0 = Unformatted page 1 = Will comply with message 0 = Cannot comply with message 48 Revision 2.2 Micrel, Inc. KSZ9031MNX IEEE Defined Registers – Descriptions (Continued) (5) Address Name Description Mode Default 7.11 Toggle 1 = Previous value of the transmitted link code word equaled logic one RO 0 RW 000_0000_0001 RO 0 RO 0 RO 0 RO 0 RO 0 RO 000_0000_0000 0 = Logic zero 7.10:0 Message Field 11-bit wide field to encode 2048 messages Register 8h – Auto-Negotiation Link Partner Next Page Ability 8.15 Next Page 8.14 Acknowledge 8.13 Message Page 8.12 Acknowledge2 8.11 Toggle 8.10:0 Message Field May 14, 2015 1 = Additional next pages will follow 0 = Last page 1 = Successful receipt of link word 0 = No successful receipt of link word 1 = Message page 0 = Unformatted page 1 = Able to act on the information 0 = Not able to act on the information 1 = Previous value of transmitted link code word equal to logic zero 0 = Previous value of transmitted link code word equal to logic one 49 Revision 2.2 Micrel, Inc. KSZ9031MNX IEEE Defined Registers – Descriptions (Continued) Register 9h – 1000Base-T Control Address Name (5) Description Mode Default RW 000 RW 0 RW 0 Transmitter test mode operations [9.15:13] 9.15:13 Mode [000] Normal operation [001] Test mode 1 –Transmit waveform test [010] Test mode 2 –Transmit jitter test in master mode [011] Test mode 3 –Transmit jitter test in slave mode [100] Test mode 4 –Transmitter distortion test [101] Reserved, operations not identified Test Mode Bits [110] Reserved, operations not identified [111] Reserved, operations not identified To enable 1000Base-T Test Mode: 1) Set Register 0h = 0x0140 to disable autonegotiation and select 1000Mbps speed. 2) Set Register 9h, bits [15:13] = 001, 010, 011, or 100 to select one of the 1000Base-T Test Modes. After the above settings, the test waveform for the selected test mode is transmitted onto each of the 4 differential pairs. No link partner is needed. 9.12 Master-Slave Manual Configuration Enable 9.11 Master-Slave Manual Configuration Value May 14, 2015 1 = Enable master-slave manual configuration value 0 = Disable master-slave manual configuration value 1 = Configure PHY as master during master- slave negotiation 0 = Configure PHY as slave during masternegotiation slave This bit is ignored if master-slave manual onfiguration is disabled (Reg. 9.12 = 0). 50 Revision 2.2 Micrel, Inc. KSZ9031MNX IEEE Defined Registers – Descriptions (Continued) Address Name (5) Description Mode Default RW 0 RW 1 1 = Indicate the preference to operate as multiport device (master) 9.10 Port Type 0 = Indicate the preference to operate as single-port device (slave) This bit is valid only if master-slave manual configuration is disabled (Reg. 9.12 = 0). 9.9 1000Base-T Full-Duplex 9.8 1000Base-T Half-Duplex 9.7:0 Reserved 1 = Advertise PHY is 1000Base-T full-duplex capable 0 = Advertise PHY is not 1000Base-T full-duplex capable 1 = Advertise PHY is 1000Base-T half-duplex capable 0 = Advertise PHY is not 1000Base-T half-duplex capable Write as 0, ignore on read RW Set by MODE[3:0] strapping pins. See the Strapping Options section for details. RO Register Ah – 1000Base-T Status A.15 Master-Slave Configuration Fault A.14 Master-Slave Configuration Resolution 1 = Local PHY configuration resolved to master A.13 Local Receiver Status 1 = Local receiver OK (loc_rcvr_status = 1) A.12 Remote Receiver Status 1 = Remote receiver OK (rem_rcvr_status = 1) 1 = Link partner is capable of 1000Base-T full-duplex A.11 Link Partner 1000Base-T Full-Duplex Capability 1 = Link partner is capable of 1000Base-T half-duplex A.10 Link Partner 1000Base-T Half-Duplex Capability A.9:8 Reserved A.7:0 May 14, 2015 Idle Error Count 1 = Master-slave configuration fault detected RO/LH/SC 0 RO 0 RO 0 RO 0 RO 0 0 = Link Partner is not capable of 1000Base-T half-duplex RO 0 Reserved RO 00 Cumulative count of errors detected when receiver is receiving idles and PMA_TXMODE.indicate = SEND_N. RO/SC 0000_0000 0 = No master-slave configuration fault detected 0 = Local PHY configuration resolved to slave 0 = Local receiver not OK (loc_rcvr_status = 0) 0 = Remote receiver not OK (rem_rcvr_status = 0) 0 = Link partner is not capable of 1000Base-T full-duplex The counter is incremented every symbol period that rxerror_status = ERROR. 51 Revision 2.2 Micrel, Inc. KSZ9031MNX IEEE Defined Registers – Descriptions (Continued) Address Name (5) Description Mode Default RW 00 Register Dh – MMD Access – Control D.15:14 MMD – Operation Mode For the selected MMD device address (Bits [4:0] of this register), these two bits select one of the following register or data operations and the usage for MMD Access – Register/Data (Reg. Eh). 00 = Register 01 = Data, no post increment 10 = Data, post increment on reads and writes 11 = Data, post increment on writes only D.13:5 Reserved Reserved RW 00_0000_000 D.4:0 MMD – Device Address These five bits set the MMD device address. RW 0_0000 RW 0000_0000_0000_0000 RO 0 RO 0 RO 1 RO 1 RO - Register Eh – MMD Access – Register/Data For the selected MMD device address (Reg. Dh, Bits [4:0]), E.15:0 MMD – Register/Data When Reg. Dh, Bits [15:14] = 00, this register contains the read/write register address for the MMD device address. Otherwise, this register contains the read/write data value for the MMD device address and its selected register address. See also Reg. Dh, Bits [15:14], for descriptions of post increment reads and writes of this register for data operation. Register Fh – Extended Status F.15 1000Base-X Full-Duplex 1 = PHY can perform 1000Base-X full-duplex F.14 1000Base-X Half-Duplex 1 = PHY can perform 1000Base-X half-duplex F.13 1000Base-T Full-Duplex 1 = PHY can perform 1000Base-T full-duplex F.12 1000Base-T Half-Duplex 1 = PHY can perform 1000Base-T half-duplex F.11:0 Reserved Ignore when read May 14, 2015 0 = PHY cannot perform 1000Base-X full-duplex 0 = PHY cannot perform 1000Base-X half-duplex 0 = PHY cannot perform 1000Base-T full-duplex 0 = PHY cannot perform 1000Base-T half-duplex 52 Revision 2.2 Micrel, Inc. KSZ9031MNX Vendor-Specific Registers – Descriptions Address Name (6) Description Mode Default RW 0000_000 RW 0 Register 11h – Remote Loopback 11.15:9 Reserved Reserved 11.8 Remote Loopback 1 = Enable remote loopback 11.7:1 Reserved Reserved RW 1111_010 11.0 Reserved Reserved RO 0 RW/SC 0 RW 0 RW 00 RW 00 RO 00 RO 0000_0000 0 = Disable remote loopback Register 12h – LinkMD – Cable Diagnostic Write value: 1 = Enable cable diagnostic test. After test has completed, this bit is self-cleared. 12.15 Cable Diagnostic Test Enable 0 = Disable cable diagnostic test. Read value: 1 = Cable diagnostic test is in progress. 0 = Indicates cable diagnostic test (if enabled) has completed and the status information is valid for read. 12.14 Reserved This bit should always be set to ‘0’. These two bits select the differential pair for testing: 12.13:12 Cable Diagnostic Test Pair 00 = Differential pair A (Pins 2, 3) 01 = Differential pair B (Pins 5, 6) 10 = Differential pair C (Pins 7, 8) 11 = Differential pair D (Pins 10, 11) 12.11:10 Reserved These two bits should always be set to ‘00’. These two bits represent the test result for the selected differential pair in Bits [13:12] of this register. 12.9:8 Cable Diagnostic Status 00 = Normal cable condition (no fault detected) 01 = Open cable fault detected 10 = Short cable fault detected 11 = Reserved 12.7:0 Cable Diagnostic Fault Data For the open or short cable fault detected in Bits [9:8] of this register, this 8-bit value represents the distance to the cable fault. Note: 6. RW = Read/Write. RO = Read only. SC = Self-cleared. LH = Latch high. LL = Latch low. May 14, 2015 53 Revision 2.2 Micrel, Inc. KSZ9031MNX Vendor-Specific Registers – Descriptions (Continued) Address Name (6) Description Mode Default RO/LH 0000_0000_0000_0 RO 0 RO 0 Reserved RO 0 Receive error counter for symbol error frames RO/RC 0000_0000_0000_0000 RW 0 RW 0 RW 0 RW 0 RW 0 RW 0 RW 0 RW 0 RO/RC 0 RO/RC 0 RO/RC 0 RO/RC 0 Register 13h – Digital PMA/PCS Status 13.15:3 Reserved 13.2 1000Base-T Link Status Reserved 1000Base-T link status 1 = Link status is OK 0 = Link status is not OK 100Base-TX link status 13.1 100Base-TX Link Status 1 = Link status is OK 0 = Link status is not OK 13.0 Reserved Register 15h – RXER Counter 15.15:0 RXER Counter Register 1Bh – Interrupt Control/Status 1B.15 Jabber Interrupt Enable 1 = Enable jabber interrupt 1B.14 Receive Error Interrupt Enable 1 = Enable receive error interrupt 1B.13 Page Received Interrupt Enable 1 = Enable page received interrupt 1B.12 Parallel Detect Fault Interrupt Enable 1B.11 Link Partner Acknowledge Interrupt Enable 1B.10 Link-Down Interrupt Enable 1 = Enable link-down interrupt 1B.9 Remote Fault Interrupt Enable 1 = Enable remote fault interrupt 1B.8 Link-Up Interrupt Enable 1 = Enable link-up interrupt 1B.7 Jabber Interrupt 1 = Jabber occurred 1B.6 Receive Error Interrupt 1 = Receive error occurred 1B.5 Page Receive Interrupt 1 = Page receive occurred 0 = Page receive did not occur 1B.4 Parallel Detect Fault Interrupt 0 = Parallel detect fault did not occur May 14, 2015 0 = Disable jabber interrupt 0 = Disable receive error interrupt 0 = Disable page received interrupt 1 = Enable parallel detect fault interrupt 0 = Disable parallel detect fault interrupt 1 = Enable link partner acknowledge interrupt 0 = Disable link partner acknowledge interrupt 0 = Disable link-down interrupt 0 = Disable remote fault interrupt 0 = Disable link-up interrupt 0 = Jabber did not occur 0 = Receive error did not occur 1 = Parallel detect fault occurred 54 Revision 2.2 Micrel, Inc. KSZ9031MNX Vendor-Specific Registers – Descriptions (Continued) (6) Address Name Description Mode Default 1B.3 Link Partner Acknowledge Interrupt 1 = Link partner acknowledge occurred RO/RC 0 1B.2 Link-Down Interrupt 1 = Link-down occurred RO/RC 0 1B.1 Remote Fault Interrupt RO/RC 0 1B.0 Link-Up Interrupt RO/RC 0 RW 0000_0000 RW 0 RW 0 Reserved RW 00_0000 Reserved RW 0 RW 0 0 = Link partner acknowledge did not occur 0 = Link-down did not occur 1 = Remote fault occurred 0 = Remote fault did not occur 1 = Link-up occurred 0 = Link-up did not occur Register 1Ch – Auto MDI/MDI-X 1C.15:8 Reserved Reserved When Swap-Off (Bit [6] of this register) is asserted (1), 1C.7 MDI Set 1 = PHY is set to operate as MDI mode 0 = PHY is set to operate as MDI-X mode This bit has no function when Swap-Off is deasserted (0). 1C.6 Swap-Off 1C.5:0 Reserved 1 = Disable Auto MDI/MDI-X function 0 = Enable Auto MDI/MDI-X function Register 1Fh – PHY Control 1F.15 Reserved 1F.14 Interrupt Level 1F.13:12 Reserved Reserved RW 00 1F.11:10 Reserved Reserved RO/LH/RC 00 1F.9 Enable Jabber RW 1 1F.8:7 Reserved Reserved RW 00 1F.6 Speed Status 1000Base-T 1 = Indicate chip final speed status at 1000Base-T RO 0 1F.5 Speed Status 100Base-TX 1 = Indicate chip final speed status at 100Base-TX RO 0 1F.4 Speed Status 10Base-T 1 = Indicate chip final speed status at 10Base-T RO 0 1F.3 Duplex status RO 0 RO 0 RW 0 RO 0 1 = Interrupt pin active high 0 = Interrupt pin active low 1 = Enable jabber counter 0 = Disable jabber counter Indicate chip duplex status 1 = Full-duplex 0 = Half-duplex Indicate chip master/slave status 1F.2 1000Base-T Master/Slave Status 0 = 1000Base-T slave mode 1F.1 Reserved Reserved 1F.0 Link Status Check Fail 1 = Fail May 14, 2015 1 = 1000Base-T master mode 0 = Not failing 55 Revision 2.2 Micrel, Inc. KSZ9031MNX MMD Registers MMD registers provide indirect read/write access to up to 32 MMD device addresses with each device supporting up to 65,536 16-bit registers, as defined in Clause 22 of the IEEE 802.3 Specification. The KSZ9031MNX, however, uses only a small fraction of the available registers. See the Register Map section for a list of supported MMD device addresses and their associated register addresses. The following two standard registers serve as the portal registers to access the indirect MMD registers. • • Standard Register Dh – MMD Access – Control Standard Register Eh – MMD Access – Register/Data Table 15. Portal Registers (Access to Indirect MMD Registers) Address Name Description Mode (6 ) Default Register Dh – MMD Access – Control D.15:14 MMD – Operation Mode For the selected MMD device address (Bits [4:0] of this register), these two bits select one of the following register or data operations and the usage for MMD Access – Register/Data (Reg. Eh). 00 = Register RW 00 01 = Data, no post increment 10 = Data, post increment on reads and writes 11 = Data, post increment on writes only D.13:5 Reserved Reserved RW 00_0000_000 D.4:0 MMD – Device Address These five bits set the MMD device address. RW 0_0000 RW 0000_0000_0000_0000 Register Eh – MMD Access – Register/Data For the selected MMD device address (Reg. Dh, Bits [4:0]), E.15:0 When Reg. Dh, Bits [15:14] = 00, this register contains the read/write register address for the MMD device address. MMD – Register/Data Otherwise, this register contains the read/write data value for the MMD device address and its selected register address. See also Register Dh, Bits [15:14] descriptions for post increment reads and writes of this register for data operation. Examples: • MMD Register Write Write MMD – Device Address 2h, Register 10h = 0001h to enable link-up detection to trigger PME for WOL. 1. 2. 3. 4. Write Register Dh with 0002h Write Register Eh with 0010h Write Register Dh with 4002h Write Register Eh with 0001h May 14, 2015 // Set up register address for MMD – Device Address 2h. // Select Register 10h of MMD – Device Address 2h. // Select register data for MMD – Device Address 2h, Register 10h. // Write value 0001h to MMD – Device Address 2h, Register 10h. 56 Revision 2.2 Micrel, Inc. KSZ9031MNX • MMD Register Read Read MMD – Device Address 2h, Register 11h – 13h for the magic packet’s MAC address 1. 2. 3. 4. 5. 6. Write Register Dh with 0002h // Set up register address for MMD – Device Address 2h. Write Register Eh with 0011h // Select Register 11h of MMD – Device Address 2h. Write Register Dh with 8002h // Select register data for MMD – Device Address 2h, Register 11h. Read Register Eh // Read data in MMD – Device Address 2h, Register 11h. Read Register Eh // Read data in MMD – Device Address 2h, Register 12h. Read Register Eh // Read data in MMD – Device Address 2h, Register 13h. MMD Registers – Descriptions Address Name (7) Description Mode Default RW 0x4000 RW 0x0003 Reserved RO 0000_000 Reserved RW 1_0000 RW 100 RW 0 MMD Address 0h, Register 3h – AN FLP Burst Transmit – LO 0.3.15:0 AN FLP Burst Transmit – LO This register and the following register set the Auto-Negotiation FLP burst transmit timing. The same timing must be set for both registers. 0x4000 = Select 8ms interval timing (default) 0x1A80 = Select 16ms interval timing All other values are reserved. MMD Address 0h, Register 4h – AN FLP Burst Transmit – HI 0.4.15:0 AN FLP Burst Transmit – HI This register and the previous register set the Auto-Negotiation FLP burst transmit timing. The same timing must be set for both registers. 0x0003 = Select 8ms interval timing (default) 0x0006 = Select 16ms interval timing All other values are reserved. MMD Address 1h, Register 5Ah – 1000Base-T Link-Up Time Control 1.5A.15:9 Reserved 1.5A.8:4 Reserved When the link partner is another KSZ9031 device, the 1000Base-T link-up time can be long. These three bits provide an optional setting to reduce the 1000Base-T link-up time. 100 = Default power-up setting 1.5A.3:1 1000Base-T Link-Up Time 011 = Optional setting to reduce link-up time when the link partner is a KSZ9031 device. All other settings are reserved and should not be used. The optional setting is safe to use with any link partner. Note: Read/Write access to this register bit is available only when Reg. 0h is set to 0x2100 to disable auto-negotiation and force 100Base-TX mode. 1.5A.0 Reserved Reserved Note: 7. RW = Read/Write. RO = Read only. WO = Write only. LH = Latch high. May 14, 2015 57 Revision 2.2 Micrel, Inc. KSZ9031MNX MMD Registers – Descriptions (Continued) Address Name (7) Description Mode Default RW 0000_0000_000 WO 0 MMD Address 2h, Register 0h – Common Control 2.0.15:5 Reserved Reserved Override strap-in for LED_MODE 1 = Single-LED mode 2.0.4 LED Mode Override 0 = Tri-color dual-LED mode This bit is write-only and always reads back a value of ‘0’. The updated value is reflected in Bit [3] of this register. Set by LED_MODE strapping pin. LED_MODE Status 2.0.3 LED Mode 1 = Single-LED mode RO 0 = Tri-color dual-LED mode 2.0.2 Reserved Can be updated by Bit [4] of this register after reset. Reserved RW Override strap-in for CLK125_EN 2.0.1 CLK125_EN Status 2.0.0 Reserved See the Strapping Options section for details. 0 Set by CLK125_EN strapping pin. 1 = CLK125_EN strap-in is enabled RW See the Strapping Options section for details. RW 0 RO 0000_0000 0 = CLK125_EN strap-in is disabled Reserved MMD Address 2h, Register 1h – Strap Status 2.1.15:8 Reserved Reserved Strap to 2.1.7 LED_MODE Strap-In Status 2.1.6 Reserved 2.1.5 CLK125_EN Strap-In Status Set by LED_MODE strapping pin. 1 = Single-LED mode RO See the Strapping Options section for details. RO 0 0 = Tri-color dual-LED mode Reserved Strap to Set by CLK125_EN strapping pin. 1 = CLK125_EN strap-in is enabled RO See the Strapping Options section for details. RO 00 0 = CLK125_EN strap-in is disabled 2.1.4:3 Reserved Reserved 2.1.2:0 PHYAD[2:0] Strap-In Value Strap-in value for PHY address Set by PHYAD[2:0] strapping pin. Bits [4:3] of PHY address are always set to ‘00’. RO See the Strapping Options section for details. RW 0000_0 RW 0 RW 0 MMD Address 2h, Register 2h – Operation Mode Strap Override 2.2.15:11 Reserved Reserved For INT_N/PME_N2 (Pin 53), 1 = Enable PME output 2.2.10 2.2.9 PME_N2 Output Enable 0 = Disable PME output Reserved Reserved This bit works in conjunction with MMD Address 2h, Reg. 10h, Bits [15:14] to define the output for Pin 53. ` May 14, 2015 58 Revision 2.2 Micrel, Inc. KSZ9031MNX MMD Registers – Descriptions (Continued) Address Name (7) Description Mode Default RW 0 For LED1/PME_N1 (Pin 19), 1 = Enable PME output PME_N1 Output Enable 0 = Disable PME output 2.2.7 Chip PowerDown Override 1 = Override strap-in for chip power-down mode RW See the Strapping Options section for details. 2.2.6:5 Reserved Reserved RW 00 2.2.4 NAND Tree Override 1 = Override strap-in for NAND Tree mode RW 2.2.3:2 Reserved Reserved RW 2.2.8 This bit works in conjunction with MMD Address 2h, Reg. 10h, Bits [15:14] to define the output for Pin 19. Set by MODE[3:0] strapping pin. Set by MODE[3:0] strapping pin. See the Strapping Options section for details. 00 Set by MODE[3:0] strapping pin. 2.2.1 GMII/MII override 1 = Override strap-in for GMII/MII mode RW See the Strapping Options section for details. 2.2.0 Reserved Reserved RW 0 MMD Address 2h, Register 3h – Operation Mode Strap Status 2.3.15:8 Reserved Reserved RO 0000_0000 Set by MODE[3:0] strapping pin. 2.3.7 Chip PowerDown Strap-In Status 1 = Strap to chip power-down mode RO See the Strapping Options section for details. 2.3.6:5 Reserved Reserved RO 00 2.3.4 NAND Tree Strap-In Status 1 = Strap to NAND Tree mode RO See the Strapping Options section for details. 2.3.3:2 Reserved Reserved RO 00 2.3.1 GMII/MII Strap-In Status 1 = Strap to GMII/MII mode RO See the Strapping Options section for details. 2.3.0 Reserved Reserved RO 0 Set by MODE[3:0] strapping pin. Set by MODE[3:0] strapping pin. MMD Address 2h, Register 4h – GMII Control Signal Pad Skew 2.4.15:8 Reserved Reserved RW 0000_0000 2.4.7:4 RX_DV Pad Skew GMII RX_DV output pad skew control (0.06ns/step) RW 0111 2.4.3:0 TX_EN Pad Skew GMII TX_EN input pad skew control (0.06ns/step) RW 0111 MMD Address 2h, Register 8h – GMII Clock Pad Skew 2.8.15:10 Reserved Reserved RW 0000_00 2.8.9:5 GTX_CLK Pad Skew GMII GTX_CLK input pad skew control (0.06ns/step) RW 01_111 2.8.4:0 RX_CLK Pad Skew GMII RX_CLK output pad skew control (0.06ns/step) RW 0_1111 May 14, 2015 59 Revision 2.2 Micrel, Inc. KSZ9031MNX MMD Registers – Descriptions (Continued) Address Name (7) Description Mode Default RW 00 RW 00_0000_0 RW 0 RW 0 RW 0 RW 0 RW 0 RW 0 RW 0 RW 0000_0000_0000_0000 MMD Address 2h, Register 10h – Wake-On-LAN – Control These two bits work in conjunction with MMD Address 2h, Reg. 2h, Bits [8] and [10] for PME_N1 and PME_N2 enable, to define the output for Pins 19 and 53, respectively. LED1/PME_N1 (Pin 19) 00 = PME_N1 output only 2.10.15:14 PME Output Select 01 = LED1 output only 10 = LED1 and PME_N1 output 11 = Reserved INT_N/PME_N2 (Pin 53) 00 = PME_N2 output only 01 = INT_N output only 10 = INT_N and PME_N2 output 11 = Reserved 2.10.13:7 Reserved Reserved 2.10.6 Magic Packet Detect Enable 1 = Enable magic-packet detection 2.10.5 CustomPacket Type 3 Detect Enable 1 = Enable custom-packet, Type 3 detection 2.10.4 CustomPacket Type 2 Detect Enable 1 = Enable custom-packet, Type 2 detection 2.10.3 CustomPacket Type 1 Detect Enable 1 = Enable custom-packet, Type 1 detection 2.10.2 CustomPacket Type 0 Detect Enable 1 = Enable custom-packet, Type 0 detection 2.10.1 Link-Down Detect Enable 1 = Enable link-down detection 2.10.0 Link-Up Detect Enable 1 = Enable link-up detection 0 = Disable magic-packet detection 0 = Disable custom-packet, Type 3 detection 0 = Disable custom-packet, Type 2 detection 0 = Disable custom-packet, Type 1 detection 0 = Disable custom-packet, Type 0 detection 0 = Disable link-down detection 0 = Disable link-up detection MMD Address 2h, Register 11h – Wake-On-LAN – Magic Packet, MAC-DA-0 This register stores the lower two bytes of the destination MAC address for the magic packet. 2.11.15:0 Magic Packet MAC-DA-0 Bit [15:8] = Byte 2 (MAC Address [15:8]) Bit [7:0] = Byte 1 (MAC Address [7:0]) The upper four bytes of the destination MAC address are stored in the following two registers. May 14, 2015 60 Revision 2.2 Micrel, Inc. KSZ9031MNX MMD Registers – Descriptions (Continued) Address Name (7) Description Mode Default RW 0000_0000_0000_0000 RW 0000_0000_0000_0000 MMD Address 2h, Register 12h – Wake-On-LAN – Magic Packet, MAC-DA-1 This register stores the middle two bytes of the destination MAC address for the magic packet. 2.12.15:0 Magic Packet MAC-DA-1 Bit [15:8] = Byte 4 (MAC Address [31:24]) Bit [7:0] = Byte 3 (MAC Address [23:16]) The lower two bytes and upper two bytes of the destination MAC address are stored in the previous and following registers, respectively. MMD Address 2h, Register 13h – Wake-On-LAN – Magic Packet, MAC-DA-2 This register stores the upper two bytes of the destination MAC address for the magic packet. 2.13.15:0 Magic Packet MAC-DA-2 Bit [15:8] = Byte 6 (MAC Address [47:40]) Bit [7:0] = Byte 5 (MAC Address [39:32]) The lower four bytes of the destination MAC address are stored in the previous two registers. MMD Address 2h, Register 14h – Wake-On-LAN – Customized Packet, Type 0, Expected CRC 0 MMD Address 2h, Register 16h – Wake-On-LAN – Customized Packet, Type 1, Expected CRC 0 MMD Address 2h, Register 18h – Wake-On-LAN – Customized Packet, Type 2, Expected CRC 0 MMD Address 2h, Register 1Ah – Wake-On-LAN – Customized Packet, Type 3, Expected CRC 0 This register stores the lower two bytes for the expected CRC. 2.14.15:0 2.16.15:0 2.18.15:0 Custom Packet Type X CRC 0 2.1A.15:0 Bit [15:8] = Byte 2 (CRC [15:8]) RW Bit [7:0] = Byte 1 (CRC [7:0]) 0000_0000_0000_0000 The upper two bytes for the expected CRC are stored in the following register. MMD Address 2h, Register 15h – Wake-On-LAN – Customized Packet, Type 0, Expected CRC 1 MMD Address 2h, Register 17h – Wake-On-LAN – Customized Packet, Type 1, Expected CRC 1 MMD Address 2h, Register 19h – Wake-On-LAN – Customized Packet, Type 2, Expected CRC 1 MMD Address 2h, Register 1Bh – Wake-On-LAN – Customized Packet, Type 3, Expected CRC 1 This register stores the upper two bytes for the expected CRC. 2.15.15:0 2.17.15:0 2.19.15:0 2.1B.15:0 May 14, 2015 Custom Packet Type X CRC 1 Bit [15:8] = Byte 4 (CRC [31:24]) RW Bit [7:0] = Byte 3 (CRC [23:16]) 0000_0000_0000_0000 The lower two bytes for the expected CRC are stored in the previous register. 61 Revision 2.2 Micrel, Inc. KSZ9031MNX MMD Registers – Descriptions (Continued) Address Name (7) Description Mode Default MMD Address 2h, Register 1Ch – Wake-On-LAN – Customized Packet, Type 0, Mask 0 MMD Address 2h, Register 20h – Wake-On-LAN – Customized Packet, Type 1, Mask 0 MMD Address 2h, Register 24h – Wake-On-LAN – Customized Packet, Type 2, Mask 0 MMD Address 2h, Register 28h – Wake-On-LAN – Customized Packet, Type 3, Mask 0 This register selects the bytes in the first 16 bytes of the packet (bytes 1 thru 16) that will be used for CRC calculation. For each bit in this register, 2.1C.15:0 1 = Byte is selected for CRC calculation 2.20.15:0 2.24.15:0 Custom Packet Type X Mask 0 2.28.15:0 0 = Byte is not selected for CRC calculation The register-bit to packet-byte mapping is as follows: Bit [15] : Byte 16 … : … Bit [2] : Byte 2 Bit [0] : Byte 1 RW 0000_0000_0000_0000 MMD Address 2h, Register 1Dh – Wake-On-LAN – Customized Packet, Type 0, Mask 1 MMD Address 2h, Register 21h – Wake-On-LAN – Customized Packet, Type 1, Mask 1 MMD Address 2h, Register 25h – Wake-On-LAN – Customized Packet, Type 2, Mask 1 MMD Address 2h, Register 29h – Wake-On-LAN – Customized Packet, Type 3, Mask 1 This register selects the bytes in the second 16 bytes of the packet (bytes 17 thru 32) that will be used for CRC calculation. For each bit in this register, 1 = Byte is selected for CRC calculation 2.1D.15:0 2.21.15:0 2.25.15:0 2.29.15:0 May 14, 2015 Custom Packet Type X Mask 1 0 = Byte is not selected for CRC calculation The register-bit to packet-byte mapping is as follows: Bit [15] : Byte 32 … : … Bit [2] : Byte 18 Bit [0] : Byte 17 62 RW 0000_0000_0000_0000 Revision 2.2 Micrel, Inc. KSZ9031MNX MMD Registers – Descriptions (Continued) Address Name (7) Description Mode Default MMD Address 2h, Register 1Eh – Wake-On-LAN – Customized Packet, Type 0, Mask 2 MMD Address 2h, Register 22h – Wake-On-LAN – Customized Packet, Type 1, Mask 2 MMD Address 2h, Register 26h – Wake-On-LAN – Customized Packet, Type 2, Mask 2 MMD Address 2h, Register 2Ah – Wake-On-LAN – Customized Packet, Type 3, Mask 2 This register selects the bytes in the third 16 bytes of the packet (bytes 33 thru 48) that will be used for CRC calculation. For each bit in this register, 2.1E.15:0 1 = Byte is selected for CRC calculation 2.22.15:0 2.26.15:0 Custom Packet Type X Mask 2 2.2A.15:0 0 = Byte is not selected for CRC calculation The register-bit to packet-byte mapping is as follows: Bit [15] : Byte 48 … : … Bit [2] : Byte 34 Bit [0] : Byte 33 RW 0000_0000_0000_0000 MMD Address 2h, Register 1Fh – Wake-On-LAN – Customized Packet, Type 0, Mask 3 MMD Address 2h, Register 23h – Wake-On-LAN – Customized Packet, Type 1, Mask 3 MMD Address 2h, Register 27h – Wake-On-LAN – Customized Packet, Type 2, Mask 3 MMD Address 2h, Register 2Bh – Wake-On-LAN – Customized Packet, Type 3, Mask 3 This register selects the bytes in the fourth 16 bytes of the packet (bytes 49 thru 64) that will be used for CRC calculation. For each bit in this register, 2.1F.15:0 1 = Byte is selected for CRC calculation 2.23.15:0 2.27.15:0 Custom Packet Type X Mask 3 2.2B.15:0 0 = Byte is not selected for CRC calculation RW 0000_0000_0000_0000 Reserved RW 0000 1 = Force 1000Base-T low-power idle transmission RW 0 RW 0 RW 00_0000_0000 The register-bit to packet-byte mapping is as follows: Bit [15] : Byte 64 … : … Bit [2] : Byte 50 Bit [0] : Byte 49 MMD Address 3h, Register 0h – PCS EEE – Control 3.0.15:12 3.0.11 3.0.10 3.0.9:0 May 14, 2015 Reserved 1000Base-T Force LPI 0 = Normal operation During receive lower-power idle mode, 100Base-TX RX_CLK Stoppable 1 = RX_CLK stoppable for 100Base-TX Reserved Reserved 0 = RX_CLK not stoppable for 100Base-TX 63 Revision 2.2 Micrel, Inc. KSZ9031MNX MMD Registers – Descriptions (Continued) Address Name (7) Description Mode Default RO 0000 RO/LH 0 RO/LH 0 MMD Address 3h, Register 1h – PCS EEE – Status 3.1.15:12 Reserved Reserved 3.1.11 Transmit LowPower Idle Received 1 = Transmit PCS has received low-power idle 3.1.10 Receive LowPower Idle Received 3.1.9 Transmit LowPower Idle Indication 3.1.8 Receive LowPower Idle Indication 3.1.7:0 Reserved 0 = Low-power idle not received 1 = Receive PCS has received low-power idle 0 = Low-power idle not received 1 = Transmit PCS is currently receiving lowpower idle 0 = Transmit PCS is not currently receiving lowpower idle 1 = Receive PCS is currently receiving lowpower idle 0 = Receive PCS is not currently receiving lowpower idle Reserved RO RO RO 0000_0000 RW 0000_0000_0000_0 RW 0 This bit is set to ‘0’ as the default after power-up or reset. Set this bit to ‘1’ to enable 100Mbps EEE mode. RW 0 Reserved RW 0 RO 0000_0000_0000_0 RO 0 RO 0 RO 0 RW 0000_0 RW 0 RW 00_1111_1111 MMD Address 7h, Register 3Ch – EEE Advertisement 7.3C.15:3 Reserved Reserved 1 = 1000Mbps EEE capable 7.3C.2 1000Base-T EEE 0 = No 1000Mbps EEE capability This bit is set to ‘0’ as the default after power-up or reset. Set this bit to ‘1’ to enable 1000Mbps EEE mode. 1 = 100Mbps EEE capable 7.3C.1 100Base-TX EEE 7.3C.0 Reserved 0 = No 100Mbps EEE capability MMD Address 7h, Register 3Dh – EEE Link Partner Advertisement 7.3D.15:3 Reserved Reserved 7.3D.2 1000Base-T EEE 1 = 1000Mbps EEE capable 7.3D.1 100Base-TX EEE 1 = 100Mbps EEE capable 7.3D.0 Reserved Reserved 0 = No 1000Mbps EEE capability 0 = No 100Mbps EEE capability MMD Address 1Ch, Register 4h – Analog Control 4 1C.4.15:11 Reserved Reserved 1C.4.10 10Base-Te Mode 1 = EEE 10Base-Te (1.75V TX amplitude) 1C.4.9:0 Reserved Reserved May 14, 2015 0 = Standard 10Base-T (2.5V TX amplitude) 64 Revision 2.2 Micrel, Inc. KSZ9031MNX MMD Registers – Descriptions (Continued) Address Name (7) Description Mode Default RW 0000_0000_0000_000 RW 0 MMD Address 1Ch, Register 23h – EDPD Control 1C.23.15:1 Reserved 1C.23.0 EDPD Mode Enable Reserved Energy-detect power-down mode 1 = Enable 0 = Disable May 14, 2015 65 Revision 2.2 Micrel, Inc. KSZ9031MNX Absolute Maximum Ratings(8) Operating Ratings(9) Supply Voltage (VIN) (DVDDL, AVDDL, AVDDL_PLL) ............. –0.5V to +1.8V (AVDDH) ................................................. –0.5V to +5.0V (DVDDH) ................................................. –0.5V to +5.0V Input Voltage (all inputs) .............................. –0.5V to +5.0V Output Voltage (all outputs) ......................... –0.5V to +5.0V Lead Temperature (soldering, 10s) ............................ 260°C Storage Temperature (Ts) ......................... –55°C to +150°C Supply Voltage (DVDDL, AVDDL, AVDDL_PLL) ..... +1.140V to +1.260V (AVDDH @ 3.3V) ............................ +3.135V to +3.465V (AVDDH @ 2.5V, C-temp only) ....... +2.375V to +2.625V (DVDDH @ 3.3V) ............................ +3.135V to +3.465V (DVDDH @ 2.5V) ............................ +2.375V to +2.625V (DVDDH @ 1.8V) ............................ +1.710V to +1.890V Ambient Temperature (TA Commercial: KSZ9031MNXC) ............. 0°C to +70°C (TA Industrial: KSZ9031MNXI) ............... −40°C to +85°C Maximum Junction Temperature (TJ, maximum) ....... 125°C Thermal Resistance (θJA) .................................... 32.27°C/W Thermal Resistance (θJC) ...................................... 6.76°C/W Electrical Characteristics(10) Symbol Parameter Condition Min. Typ. Max. Units Supply Current – Core / Digital I/Os 1.2V Total of: DVDDL (digital core) + ICORE AVDDL (analog core) + AVDDL_PLL (PLL) IDVDDH_1.8 1.8V for Digital I/Os (GMII/MII operating @ 1.8V) 1000Base-T link-up (no traffic) 211 1000Base-T full-duplex @ 100% utilization 221 100Base-TX link-up (no traffic) 60.6 100Base-TX full-duplex @ 100% utilization 61.2 10Base-T link-up (no traffic) 7.0 10Base-T full-duplex @ 100% utilization 7.7 Software power-down mode (Reg. 0.11 = 1) 0.9 Chip power-down mode (strap-in pins MODE[3:0] = 0111) 0.8 1000Base-T link-up (no traffic) 14.2 1000Base-T full-duplex @ 100% utilization 29.3 100Base-TX link-up (no traffic) 7.3 100Base-TX full-duplex @ 100% utilization 10.0 10Base-T link-up (no traffic) 3.1 10Base-T full-duplex @ 100% utilization 6.0 Software power-down mode (Reg. 0.11 = 1) 3.7 Chip power-down mode (strap-in pins MODE[3:0] = 0111) 0.2 mA mA Notes: 8. Exceeding the absolute maximum rating can damage the device. Stresses greater than the absolute maximum rating can cause permanent damage to the device. Operation of the device at these or any other conditions above those specified in the operating sections of this specification is not implied. Maximum conditions for extended periods may affect reliability. 9. The device is not guaranteed to function outside its operating rating. 10. TA = 25°C. Specification is for packaged product only. May 14, 2015 66 Revision 2.2 Micrel, Inc. KSZ9031MNX Electrical Characteristics(10) (Continued) Symbol IDVDDH_2.5 IDVDDH_3.3 Parameter 2.5V for Digital I/Os (GMII/MII operating @ 2.5V) 3.3V for Digital I/Os (GMII/MII operating @ 3.3V) Condition Min. Typ. 1000Base-T link-up (no traffic) 19.3 1000Base-T full-duplex @ 100% utilization 40.5 100Base-TX link-up (no traffic) 10.0 100Base-TX full-duplex @ 100% utilization 13.7 10Base-T link-up (no traffic) 4.3 10Base-T full-duplex @ 100% utilization 8.3 Software power-down mode (Reg. 0.11 = 1) 5.3 Chip power-down mode (strap-in pins MODE[3:0] = 0111) 0.9 1000Base-T link-up (no traffic) 26.0 1000Base-T full-duplex @ 100% utilization 53.8 100Base-TX link-up (no traffic) 13.3 100Base-TX full-duplex @ 100% utilization 18.0 10Base-T link-up (no traffic) 5.7 10Base-T full-duplex @ 100% utilization 11.1 Software power-down mode (Reg. 0.11 = 1) 7.1 Chip power-down mode (strap-in pins MODE[3:0] = 0111) 2.1 Max. Units mA mA Supply Current – Transceiver (equivalent to current draw through external transformer center taps for PHY transceivers with current-mode transmit drivers) IAVDDH_2.5 IAVDDH_3.3 1000Base-T link-up (no traffic) 58.6 1000Base-T full-duplex @ 100% utilization 57.6 100Base-TX link-up (no traffic) 24.8 2.5V for Transceiver 100Base-TX full-duplex @ 100% utilization 24.8 (Recommended for commercial temperature range operation only) 10Base-T link-up (no traffic) 12.5 10Base-T full-duplex @ 100% utilization 25.8 Software power-down mode (Reg. 0.11 = 1) 3.0 Chip power-down mode (strap-in pins MODE[3:0] = 0111) 0.02 1000Base-T link-up (no traffic) 66.6 3.3V for Transceiver May 14, 2015 1000Base-T full-duplex @ 100% utilization 65.6 100Base-TX link-up (no traffic) 28.7 100Base-TX full-duplex @ 100% utilization 28.7 10Base-T link-up (no traffic) 17.0 10Base-T full-duplex @ 100% utilization 29.3 Software power-down mode (Reg. 0.11 = 1) 4.1 Chip power-down mode (strap-in pins MODE[3:0] = 0111) 0.02 67 mA mA Revision 2.2 Micrel, Inc. KSZ9031MNX Electrical Characteristics(10) (Continued) Symbol Parameter Condition Min. Typ. Max. Units CMOS Inputs VIH VIL IIHL Input High Voltage Input Low Voltage Input High Leakage Current DVDDH (digital I/Os) = 3.3V 2.0 DVDDH (digital I/Os) = 2.5V 1.5 DVDDH (digital I/Os) = 1.8V 1.1 V DVDDH (digital I/Os) = 3.3V 1.3 DVDDH (digital I/Os) = 2.5V 1.0 DVDDH (digital I/Os) = 1.8V 0.7 DVDDH = 3.3V and VIH = 3.3V All digital input pins V -2.0 2.0 µA -2.0 2.0 µA -120 -40 µA DVDDH = 3.3V and VIL = 0.0V IILL Input Low Leakage Current All digital input pins, except MDC, MDIO, RESET_N. DVDDH = 3.3V and VIL = 0.0V MDC, MDIO, RESET_N pins with internal pull-ups CMOS Outputs DVDDH (digital I/Os) = 3.3V, IOH (min) = 10mA All digital output pins VOH Output High Voltage DVDDH (digital I/Os) = 2.5V, IOH (min) = 10mA All digital output pins DVDDH (digital I/Os) = 1.8V, IOH (min) = 13mA All digital output pins, except LED1, LED2 2.7 2.0 V 1.5 DVDDH (digital I/Os) = 3.3V, IOL (min) = 10mA 0.3 All digital output pins VOL Output Low Voltage DVDDH (digital I/Os) = 2.5V, IOL (min) = 10mA 0.3 All digital output pins DVDDH (digital I/Os) = 1.8V, IOL (min) = 13mA 0.3 All digital output pins, except LED1, LED2 |Ioz| V Output Tri-State Leakage 10 µA LED Outputs ILED Output Drive Current DVDDH (digital I/Os) = 3.3V or 2.5V, and VOL at 0.3V 10 mA Each LED pin (LED1, LED2) Pull-Up Pins pu Internal Pull-Up Resistance (MDC, MDIO, RESET_N pins) May 14, 2015 DVDDH (digital I/Os) = 3.3V 13 22 31 DVDDH (digital I/Os) = 2.5V 16 28 39 DVDDH (digital I/Os) = 1.8V 26 44 62 68 kΩ Revision 2.2 Micrel, Inc. KSZ9031MNX Electrical Characteristics(10) (Continued) Symbol Parameter Condition Min. Typ. Max. Units 100Base-TX Transmit (Measured differentially after 1:1 transformer) VO Peak Differential Output Voltage 100Ω termination across differential output VIMB Output Voltage Imbalance 100Ω termination across differential output tr , tf Rise/Fall Time Rise/Fall Time Imbalance 0.95 1.05 V 2 % 3 5 ns 0 0.5 ns ±0.25 ns 5 % Duty Cycle Distortion Overshoot Output Jitter Peak-to-peak 0.7 ns 10Base-T Transmit (Measured differentially after 1:1 transformer) VP Peak Differential Output Voltage 100Ω termination across differential output Jitter Added Peak-to-peak Harmonic Rejection Transmit all-one signal sequence 2.2 2.8 V 3.5 ns –31 dB 400 mV 1.2 V 10Base-T Receive VSQ Squelch Threshold 5MHz square wave 300 Transmitter – Drive Setting VSET Reference Voltage of ISET R(ISET) = 12.1kΩ LDO Controller – Drive Range VLDO_O Output drive range for LDO_O (Pin 58) to gate input of P-channel MOSFET May 14, 2015 AVDDH = 3.3V for MOSFET source voltage 0.85 2.8 AVDDH = 2.5V for MOSFET source voltage (recommended for commercial temperature range operation only) 0.85 2.0 69 V Revision 2.2 Micrel, Inc. KSZ9031MNX Timing Diagrams GMII Transmit Timing Figure 13. GMII Transmit Timing – Data Input to PHY Table 16. GMII Transmit Timing Parameters Timing Parameter Description Min. Typ. Max. Unit 8.0 8.5 ns 1000Base-T tCYC GTX_CLK period 7.5 tSU TX_EN, TXD[7:0], TX_ER setup time to rising edge of GTX_CLK 2.0 ns tHD TX_EN, TXD[7:0], TX_ER hold time from rising edge of GTX_CLK 0 ns tHI GTX_CLK high pulse width 2.5 ns tLO GTX_CLK low pulse width 2.5 ns tR GTX_CLK rise time 1.0 ns tF GTX_CLK fall time 1.0 ns May 14, 2015 70 Revision 2.2 Micrel, Inc. KSZ9031MNX GMII Receive Timing Figure 14. GMII Receive Timing – Data Input to MAC Table 17. GMII Receive Timing Parameters Timing Parameter Description Min. Typ. Max. Unit 7.5 8.0 8.5 ns 1000Base-T tCYC RX_CLK period tSU RX_DV, RXD[7:0], RX_ER setup time to rising edge of RX_CLK 2.5 ns tHD RX_DV, RXD[7:0], RX_ER hold time from rising edge of RX_CLK 0.5 ns tHI RX_CLK high pulse width 2.5 ns tLO RX_CLK low pulse width 2.5 ns tR RX_CLK rise time 1.0 ns tF RX_CLK fall time 1.0 ns May 14, 2015 71 Revision 2.2 Micrel, Inc. KSZ9031MNX MII Transmit Timing Figure 15. MII Transmit Timing – Data Input to PHY Table 18. MII Transmit Timing Parameters Timing Parameter Description Min. Typ. Max. Unit 10Base-T tCYC TX_CLK period 400 ns tSU TX_EN, TXD[3:0], TX_ER setup time to rising edge of TX_CLK 15 ns tHD TX_EN, TXD[3:0], TX_ER hold time from rising edge of TX_CLK 0 ns tHI TX_CLK high pulse width 140 260 ns tLO TX_CLK low pulse width 140 260 ns 100Base-TX tCYC TX_CLK period 40 ns tSU TX_EN, TXD[3:0], TX_ER setup time to rising edge of TX_CLK 15 ns tHD TX_EN, TXD[3:0], TX_ER hold time from rising edge of TX_CLK 0 ns tHI TX_CLK high pulse width 14 26 ns tLO TX_CLK low pulse width 14 26 ns May 14, 2015 72 Revision 2.2 Micrel, Inc. KSZ9031MNX MII Receive Timing Figure 16. MII Receive Timing – Data Input to MAC Table 19. MII Receive Timing Parameters Timing Parameter Description Min. Typ. Max. Unit 10Base-T tCYC RX_CLK period 400 ns tSU RX_DV, RXD[3:0], RX_ER setup time to rising edge of RX_CLK 10 ns tHD RX_DV, RXD[3:0], RX_ER hold time from rising edge of RX_CLK 10 ns tHI RX_CLK high pulse width 140 260 ns tLO RX_CLK low pulse width 140 260 ns 100Base-TX tCYC RX_CLK period tSU RX_DV, RXD[3:0], RX_ER setup time to rising edge of RX_CLK 10 ns tHD RX_DV, RXD[3:0], RX_ER hold time from rising edge of RX_CLK 10 ns tHI RX_CLK high pulse width 14 26 ns tLO RX_CLK low pulse width 14 26 ns May 14, 2015 40 73 ns Revision 2.2 Micrel, Inc. KSZ9031MNX Auto-Negotiation Timing Figure 17. Auto-Negotiation Fast Link Pulse (FLP) Timing Table 20. Auto-Negotiation Fast Link Pulse (FLP) Timing Parameters Timing Parameter Description Min. Typ. Max. 8 16 24 Units tBTB FLP burst to FLP burst tFLPW FLP burst width tPW Clock/Data pulse width tCTD Clock pulse to data pulse 55.5 64 69.5 µs Clock pulse to clock pulse 111 128 139 µs Number of clock/data pulses per FLP burst 17 tCTC ms 2 ms 100 ns 33 The KSZ9031MNX Fast Link Pulse (FLP) burst-to-burst transmit timing for Auto-Negotiation defaults to 8ms. IEEE 802.3 Standard specifies this timing to be 16ms +/-8ms. Some PHY link partners need to receive the FLP with 16ms centered timing; otherwise, there can be intermittent link failures and long link-up times. After KSZ9031MNX power-up/reset, program the following register sequence to set the FLP timing to 16ms: 1. 2. 3. 4. 5. 6. 7. 8. 9. Write Register Dh = 0x0000 // Set up register address for MMD – Device Address 0h Write Register Eh = 0x0004 // Select Register 4h of MMD – Device Address 0h Write Register Dh = 0x4000 // Select register data for MMD – Device Address 0h, Register 4h Write Register Eh = 0x0006 // Write value 0x0006 to MMD – Device Address 0h, Register 4h Write Register Dh = 0x0000 // Set up register address for MMD – Device Address 0h Write Register Eh = 0x0003 // Select Register 3h of MMD – Device Address 0h Write Register Dh = 0x4000 // Select register data for MMD – Device Address 0h, Register 3h Write Register Eh = 0x1A80 // Write value 0x1A80 to MMD – Device Address 0h, Register 3h Write Register 0h, Bit [9] = 1 // Restart Auto-Negotiation The above setting for 16ms FLP transmit timing is compatible with all PHY link partners. May 14, 2015 74 Revision 2.2 Micrel, Inc. KSZ9031MNX MDC/MDIO Timing Figure 18. MDC/MDIO Timing Table 21. MDC/MDIO Timing Parameters Timing Parameter Description tP MDC period Min. Typ. 120 400 Max. Unit ns t1MD1 MDIO (PHY input) setup to rising edge of MDC 10 ns tMD2 MDIO (PHY input) hold from rising edge of MDC 10 ns tMD3 MDIO (PHY output) delay from rising edge of MDC 0 ns The typical MDC clock frequency is 2.5MHz (400ns clock period). The KSZ9031MNX can operate with MDC clock frequencies generated from bit banging with GPIO pin in the 10s/100s of Hertz and have been tested up to a MDC clock frequency of 8.33MHz (120ns clock period). Test condition for 8.33MHz is for one KSZ9031MNX PHY on the MDIO line with a 1.0kΩ pull-up to the DVDDH supply rail. May 14, 2015 75 Revision 2.2 Micrel, Inc. KSZ9031MNX Power-Up/Power-Down/Reset Timing Figure 19. Power-Up/Power-Down/Reset Timing Note 1: The recommended power-up sequence is to have the transceiver (AVDDH) and digital I/O (DVDDH) voltages power up before the 1.2V core (DVDDL, AVDDL, AVDDL_PLL) voltage. If the 1.2V core must power up first, the maximum lead time for the 1.2V core voltage with respect to the transceiver and digital I/O voltages should be 200µs. There is no power sequence requirement between transceiver (AVDDH) and digital I/O (DVDDH) power rails. The power-up waveforms should be monotonic for all supply voltages to the KSZ9031MNX. Note 2: After the de-assertion of reset, wait a minimum of 100µs before starting programming on the MIIM (MDC/MDIO) interface. Note 3: The recommended power-down sequence is to have the 1.2V core voltage power-down before powering down the transceiver and digital I/O voltages. Before the next power-up cycle, all supply voltages to the KSZ9031MNX should reach less than 0.4V and there should be a minimum wait time of 150ms from power-off to power-on. Table 22. Power-Up/Power-Down/Reset Timing Parameters Parameter Description Min. Max. Units tvr Supply voltages rise time (must be monotonic) 200 µs tsr Stable supply voltages to de-assertion of reset 10 ms tcs Strap-in pin configuration setup time 5 ns tch Strap-in pin configuration hold time 5 ns trc De-assertion of reset to strap-in pin output 6 ns tpc Supply voltages cycle off-to-on time 150 ms May 14, 2015 76 Revision 2.2 Micrel, Inc. KSZ9031MNX Reset Circuit The following are some reset circuit suggestions. Figure 20 illustrates the reset circuit for powering up the KSZ9031MNX if reset is triggered by the power supply. Figure 20. Reset Circuit for triggering by Power Supply Figure 21 illustrates the reset circuit for applications where reset is driven by another device (for example, the CPU or an FPGA). At power-on-reset, R, C, and D1 provide the monotonic rise time to reset the KSZ9031MNX device. The RST_OUT_N from the CPU/FPGA provides the warm reset after power-up. The KSZ9031MNX and CPU/FPGA references the same digital I/O voltage (DVDDH). Figure 21. Reset Circuit for Interfacing with CPU/FPGA Reset Output May 14, 2015 77 Revision 2.2 Micrel, Inc. KSZ9031MNX Figure 22 illustrates the reset circuit with MIC826 Voltage Supervisor driving the KSZ9031RNX reset input. DVDDH KSZ9031RNX RESET_N DVDDH Part Number MIC826 Reset Threshold MIC826TYMT / 3.075V MIC826ZYMT / 2.315V MIC826WYMT / 1.665V RESET# DVDDH = 3.3V, 2.5V, or 1.8V Figure 22. Rest Circuit with MIC826 Voltage Supervisor Reference Circuits – LED Strap-In Pins The pull-up and pull-down reference circuits for the LED2/PHYAD1 and LED1/PHYAD0 strapping pins are shown in Figure 23 for 3.3V and 2.5V DVDDH. Figure 23. Reference Circuits for LED Strapping Pins For 1.8V DVDDH, LED indication support requires voltage level shifters between LED[2:1] pins and LED indicator diodes to ensure the multiplexed PHYAD[1:0] strapping pins are latched in high/low correctly. If LED indicator diodes are not implemented, the PHYAD[1:0] strapping pins just need 10kΩ pull-up to 1.8V DVDDH for a value of 1, and 1.0kΩ pull-down to ground for a value of 0. May 14, 2015 78 Revision 2.2 Micrel, Inc. KSZ9031MNX Reference Clock – Connection and Selection A crystal or external clock source, such as an oscillator, is used to provide the reference clock for the KSZ9031MNX. The reference clock is 25MHz for all operating modes of the KSZ9031MNX. The KSZ9031MNX uses the AVDDH supply, analog 3.3V (or analog 2.5V option for commercial temp only), for the crystal/ clock pins (XI, XO). If the 25MHz reference clock is provided externally, the XI input pin should have a minimum clock voltage peak-to-peak (Vp-p) swing of 2.5V reference to ground. If Vp-p is less than 2.5V, series capacitive coupling is recommended. With capacitive coupling, the Vp-p swing can be down to 1.5V. Maximum Vp-p swing is 3.3V +5%. Figure 24 and Table 23 shows the reference clock connection to XI (Pin 61) and XO (Pin 60) of the KSZ9031MNX, and the reference clock selection criteria. Figure 24. 25MHz Crystal/Oscillator Reference Clock Connection Table 23. Reference Crystal/Clock Selection Criteria Characteristics Value Units Frequency 25 MHz Frequency tolerance (maximum) ±50 ppm Crystal series resistance (typical) 40 Ω Crystal load capacitance (typical) 22 pF On-Chip LDO Controller – MOSFET Selection If the optional LDO controller is used to generate 1.2V for the core voltage, the selected MOSFET should exceed the following minimum requirements: • • • • • P-channel 500mA (continuous current) 3.3V or 2.5V (source – input voltage) 1.2V (drain – output voltage) VGS in the range of: - (-1.2V to -1.5V) @ 500mA for 3.3V source voltage - (-1.0V to -1.1V) @ 500mA for 2.5V source voltage The VGS for the MOSFET needs to be operating in the constant current saturated region, and not towards the VGS(th), the threshold voltage for the cut-off region of the MOSFET. See end of Electrical Characteristics section for LDO controller output driving range to the gate input of the MOSFET. Refer to application note ANLAN206 – KSZ9031 Gigabit PHY Optimized Power Scheme for High Efficiency, Low-Power Consumption and Dissipation as design reference. May 14, 2015 79 Revision 2.2 Micrel, Inc. KSZ9031MNX Magnetic – Connection and Selection A 1:1 isolation transformer is required at the line interface. Use one with integrated common-mode chokes for designs exceeding FCC requirements. An optional auto-transformer stage following the chokes provides additional common-mode noise and signal attenuation. The KSZ9031MNX design incorporates voltage-mode transmit drivers and on-chip terminations. With the voltage-mode implementation, the transmit drivers supply the common-mode voltages to the four differential pairs. Therefore, the four transformer center tap pins on the KSZ9031MNX side should not be connected to any power supply source on the board; rather, the center tap pins should be separated from one another and connected through separate 0.1µF common-mode capacitors to ground. Separation is required because the common-mode voltage could be different between the four differential pairs, depending on the connected speed mode. Figure 25 shows the typical gigabit magnetic interface circuit for the KSZ9031MNX. Figure 25. Typical Gigabit Magnetic Interface Circuit May 14, 2015 80 Revision 2.2 Micrel, Inc. KSZ9031MNX Table 24 lists recommended magnetic characteristics. Table 24. Magnetics Selection Criteria Parameter Value Test Condition Turns ratio 1 CT : 1 CT Open-circuit inductance (min.) 350µH 100mV, 100kHz, 8mA Insertion loss (max.) 1.0dB 0MHz to 100MHz HIPOT (min.) 1500Vrms Table 25 is a list of compatible single-port magnetics with separated transformer center tap pins on the G-PHY chip side that can be used with the KSZ9031MNX. Table 25. Compatible Single-Port 10/100/1000 Magnetics Manufacturer Part Number Auto-Transformer Temperature Range Magnetic + RJ-45 Bel Fuse 0826-1G1T-23-F Yes 0°C to 70°C Yes HALO TG1G-E001NZRL No –40°C to 85°C No HALO TG1G-S001NZRL No 0°C to 70°C No HALO TG1G-S002NZRL Yes 0°C to 70°C No Pulse H5007NL Yes 0°C to 70°C No Pulse H5062NL Yes 0°C to 70°C No Pulse HX5008NL Yes –40°C to 85°C No Pulse JK0654219NL Yes 0°C to 70°C Yes Pulse JK0-0136NL No 0°C to 70°C Yes TDK TLA-7T101LF No 0°C to 70°C No Wurth/Midcom 000-7093-37R-LF1 Yes 0°C to 70°C No May 14, 2015 81 Revision 2.2 Micrel, Inc. KSZ9031MNX Package Information(11) and Recommended Landing Pattern 64-Pin (8mm × 8mm) QFN Note: 11. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com. May 14, 2015 82 Revision 2.2 Micrel, Inc. KSZ9031MNX MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide high performance linear and power, LAN, and timing & communications markets. The Company’s products include advanced mixed-signal, analog & power semiconductors; high-performance communication, clock management, MEMs-based clock oscillators & crystal-less clock generators, Ethernet switches, and physical layer transceiver ICs. Company customers include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer products. Corporation headquarters and state-of-the-art wafer fabrication facilities are located in San Jose, CA, with regional sales and support offices and advanced technology design centers situated throughout the Americas, Europe, and Asia. Additionally, the Company maintains an extensive network of distributors and reps worldwide. Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this datasheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2012 Micrel, Incorporated. May 14, 2015 83 Revision 2.2