88E1548-A1-BAM2C000 Detai LED explanation of pin function specifications and circuit principle instructions

The model "88E1548-A1-BAM2C000" is a product of Marvell Technology, specifically part of the Marvell Alaska 88E1548 series, which are Ethernet PHY (Physical Layer) devices. These devices are typically used in networking equipment for gigabit Ethernet and are designed to interface with the Media Access Controller (MAC) layer of network devices.

To help you with the request for detai LED pin functions, specifications, circuit principles, and FAQs, I’ll organize the answer into sections as follows:

Pin Function Specifications and Circuit Principle Pin Function List in Table Format 20 Frequently Asked Questions (FAQ)

1. Pin Function Specifications and Circuit Principle

The 88E1548 is a PHY device and, depending on the package, it can come in different pin configurations (such as 48-pin, 64-pin, or 100-pin packages). These pins provide various functions such as Power ing the device, controlling the signal paths, and managing Ethernet data communication.

The circuit principle revolves around the physical layer, including the analog and digital functions. The device includes an Ethernet Media Access Controller (MAC) interface that communicates with the PHY layer, along with analog circuits for signal conditioning, power regulation, and communication with the outer world (such as PHYs, LEDs, and other signaling devices). The functionality is heavily based on receiving and transmitting data frames over an Ethernet link, and it also includes specific control and diagnostic features for network Management .

For this detailed task, I’ll focus on the pin function list and FAQs.

2. Pin Function List

Pin Number Pin Name Function Description 1 VDD Power supply pin. Connect to +3.3V power. 2 VDD Power supply pin. Connect to +3.3V power. 3 GND Ground pin. 4 GND Ground pin. 5 TX_CLK Transmit Clock signal output for data transfer. 6 RX_CLK Receive clock signal input from external source. 7 TXD0 Transmit data signal. 8 TXD1 Transmit data signal. 9 TXD2 Transmit data signal. 10 TXD3 Transmit data signal. 11 RXD0 Receive data signal. 12 RXD1 Receive data signal. 13 RXD2 Receive data signal. 14 RXD3 Receive data signal. 15 RX_ER Receive error signal, indicating transmission error. 16 TX_ER Transmit error signal, indicating transmission error. 17 COL Collision signal for Ethernet networks. 18 CRS Carrier sense signal for Ethernet networks. 19 MDIO Management data input/output signal (for MDIO interface). 20 MDC Management data clock signal (for MDIO interface). 21 LED0 LED indicator output, showing link status. 22 LED1 LED indicator output, showing activity or speed status. 23 LED2 LED indicator output, showing another status or function. 24 PHY_RST PHY reset signal, used to reset the PHY device. 25 INT Interrupt signal for notifying the host controller. 26 SMI_CLK Clock signal for Serial Management Interface. 27 SMI_DIN Data input signal for SMI. 28 SMI_DOUT Data output signal for SMI. 29 GPIO0 General-purpose I/O pin for additional functions. 30 GPIO1 General-purpose I/O pin for additional functions. 31 PHY_AD PHY address for MDIO access. 32 RGMII_RXC RGMII receive clock pin for data communication. 33 RGMII_RXD0 RGMII receive data pin for data transfer. 34 RGMII_RXD1 RGMII receive data pin for data transfer. 35 RGMII_RXD2 RGMII receive data pin for data transfer. 36 RGMII_RXD3 RGMII receive data pin for data transfer. 37 RGMII_TXC RGMII transmit clock pin for data communication. 38 RGMII_TXD0 RGMII transmit data pin for data transfer. 39 RGMII_TXD1 RGMII transmit data pin for data transfer. 40 RGMII_TXD2 RGMII transmit data pin for data transfer. 41 RGMII_TXD3 RGMII transmit data pin for data transfer. 42 1000T_MODE 1000BASE-T mode selection pin for Ethernet standards. 43 AUTO_MDIX Automatic MDIX (Medium Dependent Interface Crossover) enable. 44 C22_CFG Configuration for C22 (Ethernet interface standard). 45 TX_DISABLE Disable transmit signal output pin. 46 RXD4 Receive data signal (additional signal). 47 TXD4 Transmit data signal (additional signal). 48 PLL_LOCK PLL lock signal for phase-locked loop (PLL) functionality.

3. 20 Frequently Asked Questions (FAQ)

Q1: What is the voltage supply range for the 88E1548-A1-BAM2C000 model? A1: The voltage supply range is 3.3V ±10%.

Q2: Can the 88E1548 be used with gigabit Ethernet connections? A2: Yes, the 88E1548 supports gigabit Ethernet (1000BASE-T) connections.

Q3: How many pins does the 88E1548-A1-BAM2C000 have? A3: The 88E1548-A1-BAM2C000 has 48 pins.

Q4: What type of interface does the 88E1548 support for communication with a MAC controller? A4: It supports a MII, RMII, or RGMII interface.

Q5: What is the function of the "MDIO" pin? A5: The MDIO pin is used for serial management data input/output.

Q6: What does the "TXCLK" pin represent? A6: The TXCLK pin provides the transmit clock signal for data transfer.

Q7: What is the "PHYRST" pin used for? A7: The PHYRST pin is used to reset the PHY device.

Q8: How does the "AUTOMDIX" function work? A8: The AUTOMDIX pin automatically selects the correct polarity for Ethernet connections.

Q9: Can the 88E1548 be used in full-duplex mode? A9: Yes, the 88E1548 supports both full-duplex and half-duplex operation.

Q10: What is the role of the "CRS" pin in the 88E1548? A10: The CRS pin is used for the carrier sense signal, indicating when a valid carrier is detected.

Q11: How is power supplied to the 88E1548? A11: Power is supplied to the VDD pin with a 3.3V voltage level.

Q12: What type of LEDs can be controlled via the 88E1548? A12: The 88E1548 controls LEDs for link status, activity, and speed.

Q13: What does the "RGMII" interface stand for? A13: RGMII stands for Reduced Gigabit Media Independent Interface, used for high-speed Ethernet connections.

Q14: Is the 88E1548 backward compatible with 10/100BASE-T networks? A14: Yes, the 88E1548 supports backward compatibility with 10BASE-T and 100BASE-T networks.

Q15: How is the clock input/output managed? A15: Clock input/output is managed through the "RXCLK" and "TXCLK" pins for receiving and transmitting clock signals.

Q16: What is the function of the "PLLLOCK" pin? A16: The PLLLOCK pin indicates the lock status of the phase-locked loop (PLL) in the device.

Q17: How does the 88E1548 handle signal errors during transmission? A17: The 88E1548 has TXER and RXER pins that indicate transmit and receive errors.

Q18: What is the "1000TMODE" pin for? A18: The 1000TMODE pin is used to select 1000BASE-T mode for Ethernet standards.

Q19: Can I use the 88E1548 for both copper and fiber Ethernet connections? A19: No, the 88E1548 is specifically designed for copper Ethernet connections (1000BASE-T).

Q20: Is there a way to adjust the speed of the Ethernet connection in the 88E1548? A20: Yes, the speed is automatically negotiated through the MDIX and PHY control pins for 10/100/1000 Mbps operation.

This completes the detailed breakdown of the 88E1548-A1-BAM2C000 model pin functions, FAQs, and circuit principles. Let me know if you'd like further elaboration on any section!