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KSZ8041NLI Detai LED explanation of pin function specifications and circuit principle instructions

The model "KSZ8041NLI" refers to a specific Ethernet transceiver chip made by Microchip Technology. This device is part of their KSZ8000 series of Ethernet transceivers, and the "NLI" suffix typically indicates that it is a low- Power , industrial-grade part designed for various Ethernet communication systems.

The chip is usually available in a QFN (Quad Flat No-lead) or LQFP (Low-profile Quad Flat Package) package, though it's essential to verify the exact package type and pin count for a particular product batch or datasheet. In the case of the KSZ8041NLI, it comes in 48 pins.

Pin Function Specifications and Circuit Principle

The KSZ8041NLI is a single-port Ethernet PHY (Physical Layer) device that supports 10/100 Mbps Ethernet speeds. It provides the necessary functionality for transmitting and receiving Ethernet frames over twisted-pair cables. It interface s with a media access controller (MAC) to support communication in various types of network environments. The device supports the MII (Media Independent Interface) or RMII (Reduced Media Independent Interface) for communication with the MAC.

Pin Function Table (48 Pins)

Pin # Pin Name Pin Function Description 1 TXD0 Transmit Data 0 2 TXD1 Transmit Data 1 3 TXD2 Transmit Data 2 4 TXD3 Transmit Data 3 5 TXEN Transmit Enable 6 TXER Transmit Error 7 COL Collision Detect 8 CRS Carrier Sense 9 RXD0 Receive Data 0 10 RXD1 Receive Data 1 11 RXD2 Receive Data 2 12 RXD3 Receive Data 3 13 RXDV Receive Data Valid 14 RXER Receive Error 15 MII_CLK MII Clock 16 MDIO Management Data I/O 17 MDC Management Data Clock 18 VSS Ground 19 VDD Power Supply 20 RGMIIRXCTL RGMII Receive Control 21 RGMII_RXD0 RGMII Receive Data 0 22 RGMII_RXD1 RGMII Receive Data 1 23 RGMII_RXD2 RGMII Receive Data 2 24 RGMII_RXD3 RGMII Receive Data 3 25 RGMIITXCTL RGMII Transmit Control 26 RGMII_TXD0 RGMII Transmit Data 0 27 RGMII_TXD1 RGMII Transmit Data 1 28 RGMII_TXD2 RGMII Transmit Data 2 29 RGMII_TXD3 RGMII Transmit Data 3 30 RGMIITXCLK RGMII Transmit Clock 31 PHYAD0 PHY Address Bit 0 32 PHYAD1 PHY Address Bit 1 33 PHYAD2 PHY Address Bit 2 34 PHYAD3 PHY Address Bit 3 35 PWRDN Power Down 36 RESET Reset 37 XTAL1 Crystal Input 38 XTAL2 Crystal Output 39 LINK Link Status 40 SPD LED Speed LED 41 ACTLED Activity LED 42 ANEG Auto-Negotiation 43 PHYPD PHY Power-Down 44 ESDOUT ESD Output 45 LED1 LED1 Control 46 LED2 LED2 Control 47 LED3 LED3 Control 48 LED4 LED4 Control

FAQ – Common Questions (Model KSZ8041NLI)

Q: What is the purpose of the TXD0 to TXD3 pins? A: These pins are used for transmitting data from the PHY to the MAC. TXD0 to TXD3 are the four data lines that carry the Ethernet transmit data. Q: How do RXD0 to RXD3 function in the KSZ8041NLI? A: RXD0 to RXD3 are used for receiving data from the Ethernet cable. These pins transmit the received Ethernet data to the MAC. Q: What does the COL pin do? A: The COL pin is used to detect a collision in the Ethernet network. It signals when two devices attempt to transmit simultaneously, causing a collision. Q: What is the purpose of the CRS pin? A: CRS (Carrier Sense) is used to indicate that a carrier signal is present, meaning that the PHY is ready to transmit or receive Ethernet data. Q: What is the RXDV pin? A: RXDV (Receive Data Valid) is used to signal that the data on the RXD0 to RXD3 pins is valid and can be processed by the MAC. Q: How is the MII_CLK pin used? A: MII_CLK is the clock signal for the MII interface between the PHY and the MAC. It synchronizes data transfer. Q: What does the MDIO pin do? A: MDIO is used for communication between the PHY and the MAC for management purposes, such as reading and writing configuration registers. Q: What is the function of the MDC pin? A: MDC is the clock signal for the MDIO interface, controlling the timing of the data transfer. Q: What does the PHYAD0 to PHYAD3 pins represent? A: These pins define the physical address of the PHY for communication with the MAC.

Q: How does the RESET pin work?

A: The RESET pin is used to reset the PHY, ensuring it starts in a known state.

Q: What is the function of the PWRDN pin?

A: The PWRDN pin is used to put the PHY into a low-power state when it is not in use.

Q: What is the function of the XTAL1 and XTAL2 pins?

A: These pins are for connecting an external crystal to provide the clock signal for the PHY.

Q: What is the role of the LINK pin?

A: The LINK pin indicates the status of the Ethernet connection. When the link is established, this pin is active.

Q: What does the SPDLED pin do?

A: SPDLED is used to indicate the speed of the Ethernet connection (e.g., 10 Mbps or 100 Mbps).

Q: How does the ACTLED pin work?

A: ACTLED indicates the activity of the Ethernet connection. It blinks when data is being transmitted or received.

Q: What is the ANEG pin used for?

A: The ANEG pin indicates whether the auto-negotiation process is active. Auto-negotiation allows the PHY to automatically select the best connection speed.

Q: How does the PHYPD pin function?

A: The PHYPD pin is used to power down the PHY, conserving energy when the device is not in use.

Q: What does the ESDOUT pin do?

A: The ESDOUT pin helps protect the PHY from electrostatic discharge by providing an output during certain conditions.

Q: What are the LED pins used for?

A: The LED pins (LED1, LED2, LED3, LED4) are used for controlling the status and activity LEDs, providing visual feedback on the Ethernet connection.

Q: How can I interface the KSZ8041NLI with a microcontroller?

A: You can interface the KSZ8041NLI with a microcontroller via the MII or RMII interface. Ensure that the microcontroller supports one of these communication protocols.

This covers the essential functionality and pinout of the KSZ8041NLI, with details on each pin's role and common questions. If you need more specific details or explanations, feel free to ask!