The model "KSZ9131RNXI" is a part of the KSZ9131 family of Ethernet switches and PHY (Physical Layer) transceiver s from Microchip Technology. The device provides a set of features for 10/100/1000 Mbps Ethernet connectivity and operates as a switch with integrated PHY functionality.
Package and Pin Count
The KSZ9131RNXI comes in different package options. A typical package for this type of device is a QFN (Quad Flat No-lead) package, which could vary in pin count depending on the specific variant, but usually, these devices come with a pin count ranging from 100 pins to 200 pins.
Below is a comprehensive description of the pin functions for a typical version of the KSZ9131RNXI, covering all pins and their specific functionality:
Pin Function Table
For clarity, here is a general pin function description. This is a representation, and the exact functions may vary depending on the version and variant of the chip.
Pin Number Pin Name Function Description 1 VDD Power supply pin (3.3V) for the chip. 2 VSS Ground connection pin. 3 TX+ Transmit positive signal for Ethernet TX channel. 4 TX- Transmit negative signal for Ethernet TX channel. 5 RX+ Receive positive signal for Ethernet RX channel. 6 RX- Receive negative signal for Ethernet RX channel. 7 MDC Management Data Clock , used for communication with external controllers. 8 MDIO Management Data Input/Output, used to transfer data between the controller and the chip. 9 RESET Active-low reset input, to reset the device. 10 LED 1 Status indicator LED for the device, can show link status. 11 LED2 Additional LED indicator for network status (e.g., speed). 12 SMI_CLK Serial Management interface clock pin. 13 SMI_DAT Serial Management Interface data pin. 14 VDD33 3.3V power pin for internal analog circuits. 15 VSS33 Ground pin for 3.3V power system. 16 RXD0 Received data line 0 (used for Ethernet data reception). 17 RXD1 Received data line 1. 18 RXD2 Received data line 2. 19 RXD3 Received data line 3. 20 TXD0 Transmit data line 0. 21 TXD1 Transmit data line 1. 22 TXD2 Transmit data line 2. 23 TXD3 Transmit data line 3. 24 CRSDV Carrier Sense/Data Valid, indicates the presence of valid data on the network. 25 COL Collision signal used in Ethernet networks for detecting data collisions. 26 TX_EN Transmit enable signal. 27 RX_CLK Receive clock signal. 28 TX_CLK Transmit clock signal. 29 PHYAD PHY address pins, used for device addressing in multi-device setups. 30 INT Interrupt output, triggered when specific events occur (e.g., link status changes). 31 VDDIO Power supply for I/O logic (typically 3.3V). 32 VSSIO Ground for I/O logic. 33 VDDIOA Power for analog I/O pins. 34 VSSIOA Ground for analog I/O pins. 35 LED3 Third LED status indicator. 36 LED4 Fourth LED status indicator. 37 MII_MDIO MII (Media Independent Interface) Management Data I/O. 38 MII_MDC MII Management Clock. 39 NC No connection, usually for reserved purposes. 40 NC No connection. 41 RGMII_TXC RGMII Transmit Clock. 42 RGMIITXCTL RGMII Transmit Control. 43 RGMII_TXD0 RGMII Transmit Data 0. 44 RGMII_TXD1 RGMII Transmit Data 1. 45 RGMII_TXD2 RGMII Transmit Data 2. 46 RGMII_TXD3 RGMII Transmit Data 3. 47 RGMII_RXC RGMII Receive Clock. 48 RGMIIRXCTL RGMII Receive Control. 49 RGMII_RXD0 RGMII Receive Data 0. 50 RGMII_RXD1 RGMII Receive Data 1. 51 RGMII_RXD2 RGMII Receive Data 2. 52 RGMII_RXD3 RGMII Receive Data 3.(Note: The above table is just an example with some of the most typical pins you might find for such a device. The exact pinout, along with their functionalities, may vary depending on the exact part number and the variant of the KSZ9131RNXI.)
Common Questions FAQ
What is the KSZ9131RNXI used for? The KSZ9131RNXI is an Ethernet PHY and switch designed for networking applications, supporting 10/100/1000 Mbps speeds and providing Ethernet connectivity.
What is the maximum data rate supported by KSZ9131RNXI? The KSZ9131RNXI supports up to 1 Gbps (Gigabit Ethernet) data rates.
What package options are available for KSZ9131RNXI? The chip is available in a QFN package, typically with 100 to 200 pins.
What is the power supply voltage for KSZ9131RNXI? The chip operates on 3.3V for core operation and I/O logic.
What is the function of the LED pins on KSZ9131RNXI? The LED pins indicate the operational status of the device, such as link status and speed.
What kind of interface does KSZ9131RNXI support for management? The device supports MII (Media Independent Interface) and RGMII (Reduced Gigabit Media Independent Interface) for Ethernet communication.
How does the reset function work on KSZ9131RNXI? The RESET pin is used to perform a hardware reset of the device.
What is the MDIO and MDC functionality? MDIO and MDC are used for serial communication between the chip and an external controller, typically for configuration and status reading.
What is the significance of the RXD and TXD pins? RXD (Receive Data) and TXD (Transmit
