KSZ8721SL Micrel Inc, KSZ8721SL Datasheet
KSZ8721SL
Specifications of KSZ8721SL
576-1512-5
576-1512-5
KSZ8721SL
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KSZ8721SL Summary of contents
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... Functional Diagram Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com June 2009 3.3V Single Power Supply 10/100BASE-TX/FX MII Physical Layer Transceiver Features • ...
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... KSZ8721SL KSZ8721BLI – +85 o KSZ8721SLI – +85 June 2009 • KS8721BL is a drop-in replacement for the KS8721BT in the same footprint • KS8721SL is a drop-in replacement for the KS8721B in the same footprint • Commercial Temperature Range: 0 • Industrial Temperature Range: –40 • Available in 48-pin SSOP and LQFP ...
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Micrel, Inc. Revision History Revision Date Summary of Changes 0.9 01/12/04 Data sheet created. 1.0 03/06/04 Initial release. Change to new format. Added part-ordering information. Editorial changes on pin description, RMII, and media converter operation. Update circuit design, reset timing, ...
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Micrel, Inc. Contents Pin Configuration .............................................................................................................................................................. 6 Pin Description .................................................................................................................................................................. 7 (1) Strapping Options ........................................................................................................................................................ 10 Functional Description ................................................................................................................................................... 11 100BASE-TX Transmit.................................................................................................................................................. 11 100BASE-TX Receive................................................................................................................................................... 11 PLL Clock Synthesizer.................................................................................................................................................. 11 Scrambler/De-scrambler (100BASE-TX only) .............................................................................................................. 11 10BASE-T Transmit ...................................................................................................................................................... 11 10BASE-T ...
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Micrel, Inc. Timing Diagrams ............................................................................................................................................................. 26 Selection of Isolation Transformers Selection of Reference Crystal ...................................................................................................................................... 33 Package Information ....................................................................................................................................................... 34 June 2009 (1) ........................................................................................................................... 33 5 KS8721BL/SL M9999-062509-1.3 ...
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Micrel, Inc. Pin Configuration MDIO 1 MDC 2 R3D3/PHYAD1 3 RXD2/PHYAD2 4 RXD1/PHYAD3 5 RXD0/PHYAD4 6 VDDIO 7 GND 8 RXDV/PCS_LPBK 9 RXC 10 RXER/ISO 11 GND 12 VDDC 13 TXER 14 TXC/REF_CLK 15 TXEN 16 TXD0 17 TXD1 18 ...
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Micrel, Inc. Pin Description Pin Number Pin Name Type 1 MDIO I/O 2 MDC 3 RXD3/ Ipd/O PHYAD 4 RXD2/ Ipd/O PHYAD2 5 RXD1/ Ipd/O PHYAD3 6 RXD0/ Ipd/O PHYAD4 7 VDDIO P 8 GND Gnd 9 RXDV/ Ipd/O CRSDV/ ...
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Micrel, Inc. Pin Number Pin Name Type 24 VDDIO P 25 INT#/ Ipu/O PHYAD0 26 LED0/ Ipu/O TEST 27 LED1/ Ipu/O SPD100/ nFEF 28 LED2 Ipu/O 29 LED3/ Ipu/O NWAYEN 30 PD# Ipu 31 VDDRX P 32 RX- RX+ 33 ...
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Micrel, Inc. Pin Number Pin Name Type 44 GND Gnd VDDPLL P 48 RST# Ipu Note Power supply. Gnd = Ground Input Output. I/O = Bi-directional. Ipd ...
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Micrel, Inc. (1) Strapping Options Pin Number Pin Name Type 6, 5, PHYAD[4:1]/ Ipd RXD[0:3] PHYAD0/ 25 Ipu/O INT# (3) 9 PCS_LPBK/ Ipd/O RXDV (3) 11 ISO/RXER Ipd/O (3) 21 RMII/COL Ipd/O (3) 22 RMII_BTB Ipd/O CRS 27 ...
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Micrel, Inc. Functional Description 100BASE-TX Transmit The 100BASE-TX transmit function performs parallel to serial conversion, NRZ-to-NRZI conversion, and MLT-3 encoding and transmission. The circuitry starts with a parallel to serial conversion that converts the 25MHz, 4-bit nibbles into a 125MHz ...
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Micrel, Inc. SQE and Jabber Function (10BASE-T only) In 10BASE-T operation, a short pulse is put out on the COL pin after each packet is transmitted. This is required as a test of the 10BASE-T transmit/receive path and is called ...
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Micrel, Inc. receive clock is recovered from the line while carrier is active, and operates from the master input clock when the line is idle. The KS8721BL/SL synchronizes the receive data and control signals on the falling edge of RXC ...
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Micrel, Inc. Reference Clock (REF_CLK) REF_CLK is a continuous 50MHz clock that provides the timing reference for CRS_DV, RXD[1:0], TX_EN, TXD[1:0], and RX_E. REF_CLK is sourced by the MAC or an external source. Switch implementations may choose to provide REF_CLK ...
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Micrel, Inc. RMII AC Characteristics Symbol Parameter REF_CLK Frequency REF_CLK Duty Cycle t TXD[1:0], TX_EN, RXD[1:0], CRS_DV, RXER SU TXD[1:0], TX_EN, RXD[1:0], CRS_DV, RXER t H Data Hold from REF_CLK Rising Edge Unused RMII Pins Input Pins TXD[2:3] and TXER ...
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Micrel, Inc. 10/100 BASE-T Media Dependent Interface Receive Pair Transmit Pair Modular Connector (RJ45) (Repeater or Switch) Power Management The KS8721BL/SL offers the following modes for power management: • Power-Down Mode: This mode can be achieved by writing to Register ...
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Micrel, Inc. still sends out its normal transmit pattern from MAC. FEF can be disabled by strapping pin 27 low. Refer to the “Strapping Options” section. Media Converter Operation The KS8721BL/SL is capable of performing media conversion with two parts ...
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Micrel, Inc. Circuit Design Reference for Power Supply Micrel’s integrated built-in, voltage regulator technology and thoughtful implementation allows the user to save BOM cost on both existing and future designs with the use of the new KS8721BL/SL single supply, single ...
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Micrel, Inc. Register Map Register No. Description 0h Basic Control Register 1h Basic Status Register 2h PHY Identifi PHY Identifi Auto-Negotiation Advertisement Register 5h Auto-Negotiation Link Partner Ability Register 6h Auto-Negotiation Expansion Register 7h Auto-Negotiation Next ...
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Micrel, Inc. Address Name 1.13 100BASE-TX Half-Duplex 1.12 10BASE-T Full-Duplex 1.11 10BASE-T Half-Duplex 1.10:7 Reserved 1.6 No Preamble 1.5 Auto-Negotiation Complete 1.4 Remote Fault 1.3 Auto-Negotiation Ability 1.2 Link Status 1.1 Jabber Detect 1.0 Extended Capability Register 2h - PHY ...
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Micrel, Inc. Address Name 4.5 10BASE-T 4.4:0 Selector Field Register 5h - Auto-Negotiation Link Partner Ability 5.15 Next Page 5.14 Acknowledge 5.13 Remote Fault 5.12 Reserved 5.11:10 Pause 5.9 100 BASE-T4 5.8 100BASE-TX Full-Duplex 5.7 100BASE-TX 5.6 10BASE-T Full-Duplex 5.5 ...
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Micrel, Inc. Address Name 7.12 Acknowledge 2 7.11 Toggle 7.10:0 Message Field Register 8h - Link Partner Next Page Ability 8.15 Next Page 8.14 Acknowledge 8.13 Message Page 8.12 Acknowledge 2 8.11 Toggle 8.10:0 Message Field Register 15h - RXER ...
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Micrel, Inc. Address Name Link Partner 1b.3 Acknowledge Interrupt 1b.2 Link Down Interrupt 1b.1 Remote Fault Interrupt 1b.0 Link Up Interrupt Register 1fh - 100BASE-TX PHY Controller 1f.15:14 Reserved 1f.13 Pairswap Disable 1f.12 Energy Detect 1f.11 Force Link 1f.10 Power-Saving ...
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Micrel, Inc. Absolute Maximum Ratings Storage Temperature (T ) .........................–55°C to +150°C s Supply Referenced to GND.......................... –0.5V to +4.0V All Pins ......................................................... –0.5V to +4.0V Electrical Characteristics V = 3.3V ±10% DD Symbol Parameter Total Supply Current (including TX ...
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Micrel, Inc. 10Base-TX Receive R RX+/RX– Differential Input IN Resistance V Squelch Threshold SQ 10Base-TX Transmit (measured differentially after 1:1 transformer) V Peak Differential Output Voltage P Jitters Added Rise/Fall Time r f Clock Outputs X1, X2 ...
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Micrel, Inc. Timing Diagrams Symbol Parameter t TXD [3:0] Set-Up to TXC High SU1 t TXEN Set-Up to TXC High SU2 t TXD [3:0] Hold After TXC High HD1 t TXEN Hold After TXC High HD2 t TXEN High to ...
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Micrel, Inc. Symbol Parameter t TXD [3:0] Set-Up to TXC High SU1 t TXEN Set-Up to TXC High SU2 t TXD [3:0] Hold After TXC High HD1 t TXER Hold After TXC High HD2 t TXEN Hold After TXC High ...
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Micrel, Inc. Symbol Parameter t RXC Period P t RXC Pulse Width WL t RXC Pulse Width WH t RXD [3:0], RXER, RXDV Set-Up to Rising Edge of RXC SU t RXD [3:0], RXER, RXDV Hold from Rising Edge of ...
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Micrel, Inc. Symbol Parameter t FLP Burst to FLP Burst BTB t FLP Burst Width FLPW t Clock/Data Pulse Width PW t Clock Pulse to Data Pulse CTD t Clock Pulse to Clock Pulse CTC Number of Clock/Data Pulses per ...
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Micrel, Inc. Symbol Parameter t MDC Period P t MDIO Set-Up to MDC (MDIO as Input) MD1 t MDIO Hold After MDC (MDIO as Input) MD2 t MDC to MDIO Valid (MDIO as Output) MD3 June 2009 Figure 8. Serial ...
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Micrel, Inc. Symbol Parameter t Stable Supply Voltages to Reset High sr Reset Circuit Diagram Micrel recommends the following discrete reset circuit as shown in Figure 10 when powering up the KS8721BL/SL device. For the application where the reset circuit ...
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Micrel, Inc. Figure 11. Recommended Circuit for Interfacing with CPU/FPGA Reset At power-on-reset and D1 provide the necessary ramp rise time to reset the Micrel device. The reset out from CPU/FPGA provides warm reset after power up. It ...
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Micrel, Inc. Selection of Isolation Transformers One simple 1:1 isolation transformer is needed at the line interface. An isolation transformer with integrated common- mode choke is recommended for exceeding FCC requirements. The following table gives recommended transformer characteristics. Parameter Turns ...
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Micrel, Inc. Package Information June 2009 48-Pin SSOP (SM) 34 KS8721BL/SL M9999-062509-1.3 ...
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Micrel, Inc. 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 The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no ...