The part you mentioned, "KSZ8001LI", appears to be a specific component from Microchip Technology, specifically a Ethernet PHY (Physical Layer) device. The KSZ8001LI is typically used in Ethernet applications, providing the interface between digital systems and physical transmission media, supporting speeds like 10/100/1000 Mbps.
I'll break down the requested details:
Pin Function Specifications and Circuit Principle
The KSZ8001LI typically comes in a QFN-48 package (48 pins). Here is a detai LED explanation of the pin functions, corresponding to each of the 48 pins:
Pin # Pin Name Function 1 VDDIO I/O voltage supply 2 VSSIO Ground for I/O pins 3 TXD0 Transmit Data, bit 0 4 TXD1 Transmit Data, bit 1 5 TXD2 Transmit Data, bit 2 6 TXD3 Transmit Data, bit 3 7 TX_EN Transmit Enable 8 TX_ER Transmit Error 9 MDC Management Data Clock 10 MDIO Management Data Input/Output 11 RXD0 Receive Data, bit 0 12 RXD1 Receive Data, bit 1 13 RXD2 Receive Data, bit 2 14 RXD3 Receive Data, bit 3 15 RX_DV Receive Data Valid 16 RX_ER Receive Error 17 RX_CLK Receive Clock 18 CRS_DV Carrier Sense/Receive Data Valid 19 COL Collision 20 LED1 LED output 1 (for status indication) 21 LED2 LED output 2 (for status indication) 22 RGMII_RXD0 RGMII Receive Data, bit 0 23 RGMII_RXD1 RGMII Receive Data, bit 1 24 RGMII_RXD2 RGMII Receive Data, bit 2 25 RGMII_RXD3 RGMII Receive Data, bit 3 26 RGMIIRXCLK RGMII Receive Clock 27 RGMIIRXCTL RGMII Receive Control 28 RGMII_TXD0 RGMII Transmit Data, bit 0 29 RGMII_TXD1 RGMII Transmit Data, bit 1 30 RGMII_TXD2 RGMII Transmit Data, bit 2 31 RGMII_TXD3 RGMII Transmit Data, bit 3 32 RGMIITXCLK RGMII Transmit Clock 33 RGMIITXCTL RGMII Transmit Control 34 ANEG Auto-Negotiation Enable 35 RST Reset Pin (active low) 36 VDD Main Power Supply (typically 3.3V) 37 VSS Ground Pin 38 INT Interrupt Output (active low) 39 WAKE Wake-Up Signal 40 SPARE1 Spare pin, not used in all applications 41 SPARE2 Spare pin, not used in all applications 42 SPARE3 Spare pin, not used in all applications 43 SPARE4 Spare pin, not used in all applications 44 SPARE5 Spare pin, not used in all applications 45 SPARE6 Spare pin, not used in all applications 46 SPARE7 Spare pin, not used in all applications 47 SPARE8 Spare pin, not used in all applications 48 SPARE9 Spare pin, not used in all applicationsPrinciple of Circuit
The KSZ8001LI integrates various functionalities for Ethernet PHYs, such as transmission, reception, and auto-negotiation. It interfaces with a MAC (Media Access Controller) and translates between the digital signals and the signals required for network communication. It supports standard Ethernet speeds (10/100/1000 Mbps) and offers features like RGMII (Reduced Gigabit Media Independent Interface) and automatic link-up negotiation.
FAQ (Frequently Asked Questions)
What is the KSZ8001LI used for? The KSZ8001LI is an Ethernet PHY used for providing physical layer connectivity for Ethernet networks.
How many pins does the KSZ8001LI have? The KSZ8001LI has 48 pins in a QFN package.
What is the voltage supply required for the KSZ8001LI? The KSZ8001LI requires a VDD supply of 3.3V, and VDDIO can be either 3.3V or 2.5V, depending on the application.
How is the auto-negotiation function configured on the KSZ8001LI? Auto-negotiation is configured through the ANEG pin, allowing the PHY to automatically determine the link speed and duplex mode.
What kind of external clock source is needed for the KSZ8001LI? The KSZ8001LI uses an external 25 MHz clock source connected to the RX_CLK pin.
Can the KSZ8001LI support Gigabit Ethernet? Yes, the KSZ8001LI supports 10/100/1000 Mbps Ethernet speeds.
What are the LED pins used for? The LED pins (LED1 and LED2) are used for status indication, showing connection status or activity.
How do I reset the KSZ8001LI? The reset pin (RST) is active low, and can be used to reset the PHY to its initial state.
What are the collision detection and carrier sense features? The COL pin detects network collisions, while the CRS_DV pin indicates the presence of a valid data signal.
What is the purpose of the MDIO/MDC interface? The MDIO/MDC interface is used for managing the PHY’s configuration through a serial management interface.
What is the RXCLK used for? The RXCLK pin is used to provide the receive clock signal for the Ethernet interface.
Can the KSZ8001LI be used with both 10BASE-T and 100BASE-T Ethernet standards? Yes, it supports both 10BASE-T and 100BASE-T Ethernet speeds.
What is the interrupt pin for? The INT pin outputs an interrupt signal when certain events, such as link status changes or errors, occur.
Can I use the KSZ8001LI in a system with RGMII? Yes, the KSZ8001LI supports RGMII interfaces for high-speed data transmission.
What is the function of the WAKE pin? The WAKE pin is used for waking up the PHY from a low-power state upon receiving a wake-up signal.
What does TXEN and TXER stand for? TXEN (Transmit Enable) signals that valid data is being transmitted, while TXER (Transmit Error) indicates any errors in the transmission.
How does the KSZ8001LI handle link establishment? The PHY automatically negotiates link parameters using the ANEG feature, allowing devices to automatically adjust to the best link speed.
What is the significance of the RXDV and RXER pins? RXDV (Receive Data Valid) indicates that valid data is being received, while RXER signals errors in reception.
Can I configure the KSZ8001LI for full-duplex communication? Yes, the PHY supports both half-duplex and full-duplex communication modes.
What is the power consumption of the KSZ8001LI? The typical power consumption is around 160mW in normal operation, depending on the system configuration.
If you need further details or adjustments, feel free to ask!
