KS8721B A4 Micrel Inc, KS8721B A4 Datasheet
KS8721B A4
Specifications of KS8721B A4
Related parts for KS8721B A4
KS8721B A4 Summary of contents
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... The KS8721B/BT can automatically confi gure itself for 100 or 10 Mbps and full or half duplex operation, using on-chip Auto-Negotiation algorithm ideal choice of physical layer transceiver for 100BaseTX/10BaseT applications. Data sheets and support documentation can be found on Micrel’s web site at www.micrel.com. ...
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Features (continued) • LED outputs for link, activity, full/half duplex, collision and speed • Supports back to back for media converter applications • Supports MDI/MDI-X auto crossover • 2.5V/3.3V tolerance on I/O • Commercial temperature range: 0°C ...
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Revision History Revision Date Revision Date Revision Date Summary of Changes Summary of Changes Summary of Changes 1.0 1.0 1.0 1.0 2/29/02 2/29/02 2/29/02 2/29/02 Document Origination (Preliminary) Document Origination (Preliminary) Document Origination (Preliminary) Document Origination (Preliminary) 2.0 2.0 2.0 ...
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... FX Mode ....................................................................................................................................................16 Media Converter Option ........................................................................................................................................16 Register Map ............................................................................................................................................................17 Register 0h: Basic Conrol .....................................................................................................................................17 Register 1h: Basic Status .....................................................................................................................................18 Register 2h: PHY Identifi ................................................................................................................................18 Register 3h: PHY Identifi ................................................................................................................................18 Register 4h: Auto-Negotiation Advertisement .......................................................................................................18 Register 5h: Auto-Negotiation Link Partner Ability ................................................................................................18 Register 6h: Auto-Negotiation Expansion .............................................................................................................19 Register 7h: Auto-Negotiation Next Page .............................................................................................................19 Register 8h: Link Partner Next Page Ability .........................................................................................................19 Register 15h: RXER Counter Register 15h: RXER Counter ...
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Absolute Maximum Ratings .......................................................................................................................................22 Operating Ratings .......................................................................................................................................................22 Electrical Characteristics ...........................................................................................................................................22 Timing Diagrams .........................................................................................................................................................24 Selection of Isolation Transformers ..........................................................................................................................30 Selection of Reference Crystals ................................................................................................................................30 Package Outline and Dimensions .............................................................................................................................31 March 2006 5 M9999-030106 ...
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... MII Receive Data Output: The pull-up/pull-down value is latched as PHYADDR [2] MII Receive Data Output: The pull-up/pull-down value is latched as PHYADDR [2] MII Receive Data Output: The pull-up/pull-down value is latched as PHYADDR [2] MII Receive Data Output: The pull-up/pull-down value is latched as PHYADDR [2] during reset. See during reset. See during reset. See “ ...
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... Pin Function Pin Function Management Interface (MII) Interrupt Out: Latched as PHYAD[0] during power up Management Interface (MII) Interrupt Out: Latched as PHYAD[0] during power up Management Interface (MII) Interrupt Out: Latched as PHYAD[0] during power up Management Interface (MII) Interrupt Out: Latched as PHYAD[0] during power up Management Interface (MII) Interrupt Out: Latched as PHYAD[0] during power up /reset. See “ ...
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Pin Number Pin Number Pin Number Pin Name Pin Name Pin Name Type Type Type REXT REXT REXT REXT REXT VDDRCV VDDRCV VDDRCV VDDRCV VDDRCV ...
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... PD = strap pin pull-down Note 3. Some devices may drive MII pins that are designated as output (PHY) on power up, resulting in incorrect strapping values latched in at reset rcommended that an external pull down via 1kΩ resistor be used in these applications to augment the 8721's internal pull down. March 2006 ...
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... SSOP (SM) M9999-030106 48 RST# 47 VDDPLL GND 43 GND 42 VDDTX 41 TX+ 40 TX- 39 GND 38 VDDRCV 37 REXT MDIO 36 GND MDC RXD3/PHYAD1 35 GND RXD2/PHYAD2 34 FXSD/FXEN RXD1/PHYAD3 RXD0/PHYAD4 33 RX+ VDDIO GND 32 RX- RXDV/PCS_LPBK 31 VDDRX RXC RXER/ISO 30 PD# GND 29 LED3/NWAYEN 28 LED2/DUPLEX 27 LED1/SPD100 26 LED0/TEST 25 INT#/PHYAD0 GND GND 3 34 ...
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Introduction 100BaseTX Transmit The 100BaseTX transmit function performs parallel to serial conversion, NRZ to NRZI conversion, MLT-3 encoding and transmission. The circuitry starts with a parallel to serial conversion, which converts the 25MHz, 4-bit nibbles into a 125 MHz serial ...
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... Interface. This interface allows upper-layer devices to monitor and control the state of the KS8721B/BT. The MDIO interface consists of the following: • A physical connection including a data line (MDIO), a clock line (MDC) and an optional interrupt line (INTRPT) • A specifi c protocol that runs across the above-mentioned physical connection and it also allows one controller to communicate with multiple KS8721B/BT devices ...
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... RX_E. REF_CLK is sourced by the MAC or an external source. Switch implementations may choose to provide REF_CLK as an input or an output depending on whether they provide a REF_CLK output or rely on an external clock distribution device. Each PHY device shall have an input corresponding to this clock but may use a single clock input for multiple PHYs implemented on a single IC. ...
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... MII only supports chip-to-chip connections on a PCB, SQE functionality is not required. RX_ER The PHY shall provide RX_ER as an output according to the rules specifi IEEE 802.3u [2] (see Clause 24, Figure 24 Receive State Diagram). RX_ER shall be asserted for one or more REF_CLK periods to indicate that an error (e.g. a coding error or any error that a PHY is capable of detecting, and that may otherwise be undetectable by the MAC sublayer) was detected somewhere in the frame presently being transferred from the PHY ...
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... The assignment of pin-outs for a 10/100 BASE-T crossover function cable is shown below. This feature can eliminate the confusion in real applications so both straight cable and crossover cable can be used. This feature is controlled by register 1f:13. See “Register 1fh–100BaseTX PHY Controller” section for details. 10/100 BASE-T ...
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Power Management The KS8721B/BT offers the following modes for power management: • Power Down Mode: This mode can be achieved by writing to Register 0.11 or pulling pin 30 PD# Low. • Power Saving Mode: This mode can be disabled ...
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... PHY from MII and TX+/TX electrical isolation of PHY from MII and TX+/TX electrical isolation of PHY from MII and TX+/TX electrical isolation of PHY from MII and TX+/TX electrical isolation of PHY from MII and TX+/TX- ...
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... Extended Capability Extended Capability Extended Capability Extended Capability Extended Capability Extended Capability Register 2h - PHY Identifi Register 2h - PHY Identifi 2.15:0 2.15:0 2.15:0 2.15:0 2.15:0 2.15:0 PHY ID Number PHY ID Number PHY ID Number PHY ID Number PHY ID Number PHY ID Number Register 3h - PHY Identifi ...
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Address Address Address Address Name Name Name Name 5.11:10 5.11:10 5.11:10 5.11:10 5.11:10 5.11:10 Pause Pause Pause Pause Pause Pause 5.9 5.9 5.9 5.9 5.9 100 BaseT4 100 BaseT4 100 BaseT4 100 BaseT4 100 BaseT4 5.8 5.8 5.8 5.8 5.8 ...
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... Remote Fault Interrupt Remote Fault Interrupt 1b.0 1b.0 1b.0 1b.0 1b.0 1b.0 Link Up Interrupt Link Up Interrupt Link Up Interrupt Link Up Interrupt Link Up Interrupt Link Up Interrupt Register 1fh - 100BaseTX PHY Controller 1f.15:14 1f.15:14 1f.15:14 Reserved Reserved Reserved 1f:13 1f:13 1f:13 1f:13 1f:13 1f:13 Pairswap Disable ...
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... PHY in isolate mode not isolated 1 = PHY in isolate mode not isolated 1 = PHY in isolate mode not isolated 1 = PHY in isolate mode not isolated 1 = PHY in isolate mode not isolated [001] = 10BaseT half duplex [001] = 10BaseT half duplex ...
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Absolute Maximum Ratings Supply Voltage ( DDC DD_PLL DD_TX DD_RCV V ) ....................................................–0.5V to +3.0V DD_RX DD_RX DD_RX DD_RX DD_RX ( ......................................................–0.5V to +4.0V DDIO Input Voltage ................................................–0.5V to +4.0V Output ...
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Symbol Symbol Symbol Symbol Symbol Symbol Symbol Parameter Parameter Parameter Parameter Parameter Parameter Parameter 10BaseTX Receive R RX+/RX– Differential RX+/RX– Differential RX+/RX– Differential RX+/RX– Differential RX+/RX– Differential RX+/RX– Differential IN Input Resistance Input Resistance Input Resistance Input Resistance V Squelch ...
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Timing Diagrams TXC TXEN TXD[3:0] CRS TXP/TXM SQE Timing TXC TXEN COL Symbol Symbol Parameter Parameter t TXD [3:0] Set-Up to TXC High TXD [3:0] Set-Up to TXC High TXD [3:0] Set-Up to TXC High TXD [3:0] Set-Up to TXC ...
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TXC TXEN TXD[3:0], TXER CRS TX+/TX- Symbol Symbol Parameter Parameter t TXD [3:0] Set-Up to TXC High TXD [3:0] Set-Up to TXC High TXD [3:0] Set-Up to TXC High TXD [3:0] Set-Up to TXC High TXD [3:0] Set-Up to TXC ...
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RX+/RX- CRS RXDV RXD[3:0] RXER RXC Symbol Symbol Parameter Parameter t RXC Period RXC Period RXC Period RXC Period RXC Period RXC Period P t RXC Pulse Width RXC Pulse Width RXC Pulse Width RXC Pulse Width RXC Pulse Width ...
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TX+/TX- TX+/TX- Figure 7. Auto-Negotiation/Fast Link Pulse Timing Symbol Symbol Parameter Parameter t FLP Burst to FLP Burst FLP Burst to FLP Burst FLP Burst to FLP Burst FLP Burst to FLP Burst FLP Burst to FLP Burst FLP Burst ...
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MDC MDI O (Into Ch ip) MDI O (Out of Chip) Symbol Symbol Parameter Parameter t MDC Period MDC Period MDC Period MDC Period MDC Period MDC Period P t MDIO Set-Up to MDC (MDIO as input) MDIO Set-Up to ...
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Supply Voltage RST_N Strap-In Value Strap-In / Output Pin Symbol Symbol Parameter Parameter t Stable Supply Voltages to Reset High Stable Supply Voltages to Reset High Stable Supply Voltages to Reset High Stable Supply Voltages to Reset High Stable Supply ...
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Selection of Isolation Transformer 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 character- istics. Characteristics Name Characteristics Name ...
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Package Information March 2006 48-Pin SSOP (SM) 31 M9999-030106 ...
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... MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifi cations at any time without notifi cation to the customer. ...