88E1112-C2-NNC1C000 Detailed explanation of pin function specifications and circuit principle instructions

The model number "88E1112-C2-NNC1C000" corresponds to a product from Marvell, a semiconductor company known for its networking, storage, and connectivity solutions.

This specific model, 88E1112, is part of the Marvell 88E1112 Gigabit Ethernet PHY family, which is a physical layer transceiver used for Ethernet communications.

1. Package Type:

The 88E1112 typically comes in a QFN (Quad Flat No-lead) package. The QFN package is commonly used for ICs like this one, offering a compact form factor with the advantages of better thermal and electrical performance compared to other package types.

In this case, the package has 56 pins.

2. Pin Function Table for the 88E1112 (56 pins):

Below is a detailed pinout description for the 88E1112 chip, showing the function of each pin:

Pin No. Pin Name Pin Function Description 1 VDD_3V3 Power supply pin, 3.3V for the device operation. 2 VSS Ground pin. 3 MDI0+ Positive differential signal for Ethernet data. 4 MDI0- Negative differential signal for Ethernet data. 5 MDI1+ Positive differential signal for Ethernet data. 6 MDI1- Negative differential signal for Ethernet data. 7 MDI2+ Positive differential signal for Ethernet data. 8 MDI2- Negative differential signal for Ethernet data. 9 MDI3+ Positive differential signal for Ethernet data. 10 MDI3- Negative differential signal for Ethernet data. 11 MDX0+ Transmit differential signal. 12 MDX0- Transmit differential signal. 13 MDX1+ Transmit differential signal. 14 MDX1- Transmit differential signal. 15 MDX2+ Transmit differential signal. 16 MDX2- Transmit differential signal. 17 MDX3+ Transmit differential signal. 18 MDX3- Transmit differential signal. 19 RGMII_RXC+ Receive clock for the RGMII interface (positive). 20 RGMII_RXC- Receive clock for the RGMII interface (negative). 21 RGMII_RXD0+ RGMII data bit 0 (positive) for receive. 22 RGMII_RXD0- RGMII data bit 0 (negative) for receive. 23 RGMII_RXD1+ RGMII data bit 1 (positive) for receive. 24 RGMII_RXD1- RGMII data bit 1 (negative) for receive. 25 RGMII_RXD2+ RGMII data bit 2 (positive) for receive. 26 RGMII_RXD2- RGMII data bit 2 (negative) for receive. 27 RGMII_RXD3+ RGMII data bit 3 (positive) for receive. 28 RGMII_RXD3- RGMII data bit 3 (negative) for receive. 29 RGMII_TXC+ Transmit clock for the RGMII interface (positive). 30 RGMII_TXC- Transmit clock for the RGMII interface (negative). 31 RGMII_TXD0+ RGMII data bit 0 (positive) for transmit. 32 RGMII_TXD0- RGMII data bit 0 (negative) for transmit. 33 RGMII_TXD1+ RGMII data bit 1 (positive) for transmit. 34 RGMII_TXD1- RGMII data bit 1 (negative) for transmit. 35 RGMII_TXD2+ RGMII data bit 2 (positive) for transmit. 36 RGMII_TXD2- RGMII data bit 2 (negative) for transmit. 37 RGMII_TXD3+ RGMII data bit 3 (positive) for transmit. 38 RGMII_TXD3- RGMII data bit 3 (negative) for transmit. 39 RESETn Active-low reset pin for the chip. 40 REFCLK Reference clock input for the chip. 41 SCL I2C clock signal. 42 SDA I2C data signal. 43 TXD0 Transmit data bit 0 (general). 44 TXD1 Transmit data bit 1 (general). 45 TXD2 Transmit data bit 2 (general). 46 TXD3 Transmit data bit 3 (general). 47 GND Ground pin. 48 VDD_1V8 1.8V power supply pin. 49 VDD_2V5 2.5V power supply pin. 50 MDX0+ Transmit differential signal. 51 MDX0- Transmit differential signal. 52 MDX1+ Transmit differential signal. 53 MDX1- Transmit differential signal. 54 MDX2+ Transmit differential signal. 55 MDX2- Transmit differential signal. 56 MDX3+ Transmit differential signal.

3. FAQ about the 88E1112:

What is the main function of the 88E1112-C2-NNC1C000? The 88E1112 is a Gigabit Ethernet PHY that provides physical layer connectivity for Ethernet networks, supporting both standard and high-speed data communication. What is the voltage requirement for the 88E1112? The 88E1112 operates on 3.3V for its core functionality, but other voltages such as 2.5V and 1.8V may be used for other components. How many pins does the 88E1112 have? The 88E1112 has 56 pins. What type of Ethernet standards does the 88E1112 support? The 88E1112 supports Gigabit Ethernet (1000BASE-T) and Fast Ethernet (100BASE-TX). Can the 88E1112 be used for full-duplex communication? Yes, it supports full-duplex communication, allowing simultaneous transmission and reception of data. What is the operating temperature range of the 88E1112? The typical operating temperature range is from 0°C to 70°C. Is the 88E1112 compatible with both RGMII and MII interfaces? Yes, it supports both RGMII (Reduced Gigabit Media Independent Interface) and MII (Media Independent Interface). What is the reset mechanism for the 88E1112? The chip can be reset using the RESETn pin, which is active-low. How does the 88E1112 handle clocking? The 88E1112 uses an external reference clock (REFCLK) to synchronize the internal circuitry.

What are the power supply pins for the 88E1112?

The 88E1112 uses VDD3V3 for its primary power, with additional support for VDD2V5 and VDD_1V8.

How is data transmitted through the 88E1112?

The data is transmitted using differential signals via the MDX pins.

Can the 88E1112 support Auto-negotiation?

Yes, it supports Auto-negotiation to automatically adjust to different Ethernet speeds.

Is the 88E1112 compatible with 100BASE-TX?

Yes, it supports both 1000BASE-T and 100BASE-TX Ethernet standards.

What is the function of the SCL and SDA pins?

These pins are used for I2C communication, allowing for external configuration or monitoring.

What are the potential applications of the 88E1112?

The 88E1112 is typically used in network cards, routers, and switches for high-speed data communication.

What is the purpose of the RGMII interface?

The RGMII interface allows for high-speed data transmission between the PHY and the MAC (Media Access Controller).

What type of packaging does the 88E1112 come in?

The 88E1112 is typically packaged in a 56-pin QFN package.

What is the maximum data rate supported by the 88E1112?

It supports a maximum data rate of 1 Gbps (Gigabit per second).

Can the 88E1112 be used for both receive and transmit data?

Yes, it can both receive and transmit Ethernet data over the network.

Does the 88E1112 support any special power-saving modes?

Yes, the 88E1112 supports various low-power modes to optimize energy consumption when the network is idle.

I hope this helps in understanding the functionality and specifications of the 88E1112. Let me know if you need further details!