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RTL8211EG-VB-CG Detai LED explanation of pin function specifications and circuit principle instructions

The "RTL8211EG-VB-CG" you referred to is a Realtek product. Specifically, it is a Gigabit Ethernet PHY (Physical Layer Transceiver), which is commonly used in networking hardware. The RTL8211EG-VB-CG is designed to provide high-performance Ethernet connectivity for embedded systems and applications like routers, switches, and other network devices.

Packaging and Pinout

The RTL8211EG-VB-CG comes in an LQFP (Low-profile Quad Flat Package) form factor, and the number of pins in the package depends on the specific variant. For this model, the package typically has 48 pins, which are standard for most networking PHY chips.

Detai LED Pin Function List

Here is a list of the 48 pins for the RTL8211EG-VB-CG in an LQFP-48 package with their corresponding functions:

Pin Number Pin Name Pin Function Description 1 VDD33 3.3V Power supply input 2 VDDIO I/O power supply input (typically 3.3V or 1.8V) 3 RXD0 Data receive input, bit 0 4 RXD1 Data receive input, bit 1 5 RXD2 Data receive input, bit 2 6 RXD3 Data receive input, bit 3 7 RX_CLK Received clock signal (used in PHY clock recovery) 8 RX_ER Receive error signal (indicates an error in the received frame) 9 MDC Management data clock (used for communication with the host) 10 MDIO Management data input/output (used for configuration and status monitoring) 11 TXD0 Data transmit output, bit 0 12 TXD1 Data transmit output, bit 1 13 TXD2 Data transmit output, bit 2 14 TXD3 Data transmit output, bit 3 15 TX_CLK Transmit clock signal (synchronization for transmit data) 16 TX_ER Transmit error signal (indicates an error in transmission) 17 AVDD Analog power supply input (used for internal analog circuits) 18 AVSS Analog ground pin (connected to the system ground) 19 RST_N Active low reset input (for resetting the PHY chip) 20 LED0 LED output (used for indicating link status or activity) 21 LED1 LED output (another indicator for link status or activity) 22 SPDLED Speed LED output (indicates the speed of the link) 23 INT Interrupt output (indicates a specific event or condition) 24 VDD3P3 3.3V power supply input 25 X1 Crystal oscillator input (for clock generation) 26 X2 Crystal oscillator output (for clock generation) 27 PHYAD[4] PHY address bit 4 (used to set the device address) 28 PHYAD[5] PHY address bit 5 (used to set the device address) 29 PHYAD[6] PHY address bit 6 (used to set the device address) 30 PHYAD[7] PHY address bit 7 (used to set the device address) 31 RXD4 Data receive input, bit 4 32 RXD5 Data receive input, bit 5 33 RXD6 Data receive input, bit 6 34 RXD7 Data receive input, bit 7 35 VSS Ground pin 36 RXD8 Data receive input, bit 8 37 RXD9 Data receive input, bit 9 38 VDDIO1 I/O power supply input (can be 3.3V or 1.8V depending on setup) 39 ETH_CLK Ethernet clock output (used to synchronize with the Ethernet network) 40 MII_CLK MII interface clock (used for the Media Independent Interface) 41 TDP Transmit differential pair (D+) 42 TDN Transmit differential pair (D-) 43 RDP Receive differential pair (D+) 44 RDN Receive differential pair (D-) 45 VSS2 Ground pin 46 GND Ground pin 47 VDD2 Power supply input (3.3V) 48 VSS3 Ground pin

Frequently Asked Questions (FAQ)

1. What is the main function of the RTL8211EG-VB-CG?

The RTL8211EG-VB-CG is a Gigabit Ethernet PHY chip that provides Ethernet connectivity for various embedded systems and network devices.

2. What is the operating voltage for the RTL8211EG-VB-CG?

The RTL8211EG-VB-CG operates at a voltage of 3.3V for its digital I/O and analog power supplies.

3. What is the function of the RXD pins?

The RXD pins (RXD0, RXD1, RXD2, RXD3, RXD4, RXD5, RXD6, RXD7, RXD8, RXD9) are used for receiving data from the network.

4. What does the TX_CLK pin do?

The TX_CLK pin provides a clock signal that synchronizes data transmission from the PHY to the network.

5. What is the significance of the LED pins (LED0, LED1, SPDLED)?

These pins control the LED indicators that show the link status, activity, and speed of the Ethernet connection.

6. Can the PHY be reset?

Yes, the RTL8211EG-VB-CG has an active low reset pin (RST_N) that resets the chip.

7. How does the PHY communicate with a microcontroller or host?

The PHY communicates with the host via the MDC and MDIO pins, which support the Management Data Interface (MDI).

8. What is the purpose of the INT pin?

The INT pin outputs an interrupt signal to indicate a specific event or condition in the PHY.

9. Can the RTL8211EG-VB-CG work with different crystal frequencies?

Yes, it can work with different crystal frequencies, but a typical crystal for the RTL8211EG-VB-CG operates at 25 MHz.

10. How is the link speed indicated?

The speed of the link is indicated through the SPDLED pin, which controls the speed LED.

11. What is the role of the PHY address pins?

The PHY address pins (PHYAD[4], PHYAD[5], PHYAD[6], PHYAD[7]) set the address of the PHY for communication in a network system.

12. What is the meaning of the RX_ER pin?

The RX_ER pin indicates an error in the received Ethernet frame.

13. How does the chip handle power?

The RTL8211EG-VB-CG has separate pins for analog (AVDD) and digital (VDD, VDDIO) power supplies.

14. What is the use of the RST_N pin?

The RST_N pin is used to reset the PHY chip, and it is an active-low signal.

15. Is there support for 10/100/1000 Mbps Ethernet speeds?

Yes, the RTL8211EG-VB-CG supports 10/100/1000 Mbps Ethernet speeds.

16. How many pins does the RTL8211EG-VB-CG have?

The RTL8211EG-VB-CG has 48 pins in the LQFP-48 package.

17. What is the role of the MII_CLK pin?

The MII_CLK pin provides the clock signal for the Media Independent Interface (MII), which is used for Ethernet communication.

18. What is the function of the AVDD pin?

The AVDD pin is the analog power supply input, which powers the internal analog circuits.

19. Can the RTL8211EG-VB-CG support both 1000Base-T and 100Base-TX?

Yes, the RTL8211EG-VB-CG supports both 1000Base-T (Gigabit Ethernet) and 100Base-TX (Fast Ethernet) protocols.

20. What are the key features of the RTL8211EG-VB-CG?

Key features include support for Gigabit Ethernet, low power consumption, and compatibility with both MII and RMII interfaces.

This explanation includes the 48 pin functions in a detailed table format, followed by 20 FAQ questions and answers to provide comprehensive information on the RTL8211EG-VB-CG Ethernet PHY chip.