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RTL8153B-VB-CG Detai LED explanation of pin function specifications and circuit principle instructions

The model RTL8153B-VB-CG is a chip from Realtek Semiconductor, which is known for producing network interface controllers and other Communication products. The RTL8153B-VB-CG is a USB 3.0 to Ethernet controller, typically used to convert USB ports into Ethernet connections, supporting speeds up to 1000 Mbps (Gigabit Ethernet).

Pin Function Specifications

Here is a detai LED overview of the pin functions for the RTL8153B-VB-CG. Please note that the number of pins in the package varies depending on the specific model and package type. The most common package type for this IC is a QFN-32 (Quad Flat No-lead package), which has 32 pins.

Pin Function List for RTL8153B-VB-CG (QFN-32)

Pin No. Pin Name Pin Function Description 1 VDD33 Power supply (3.3V) 2 GND Ground pin 3 VDD33 Power supply (3.3V) 4 GND Ground pin 5 USB2_DP USB Data Plus pin (used for USB 2.0 Data communication) 6 USB2_DM USB Data Minus pin (used for USB 2.0 Data communication) 7 USB3_DP USB Data Plus pin (used for USB 3.0 Data communication) 8 USB3_DM USB Data Minus pin (used for USB 3.0 Data communication) 9 USB3_RET USB 3.0 Return signal pin 10 RESETB Active-low reset pin (used for hardware reset of the device) 11 SUSPENDB Active-low suspend pin (used for USB suspend mode) 12 TXD0 Transmit Data 0 (Ethernet transmit signal) 13 TXD1 Transmit Data 1 (Ethernet transmit signal) 14 RXD0 Receive Data 0 (Ethernet receive signal) 15 RXD1 Receive Data 1 (Ethernet receive signal) 16 COL Collision Detect (Ethernet signal) 17 CRS Carrier Sense (Ethernet signal) 18 MDX0 Media Data X (Ethernet Media Data) 19 MDX1 Media Data Y (Ethernet Media Data) 20 MDIO Management Data I/O (for PHY management interface) 21 MDC Management Data Clock (for PHY management interface) 22 CLK125 125 MHz clock signal output (used for Ethernet timing) 23 WOL Wake-on-LAN signal input/output 24 LED0 LED output (indicates link/activity status for Ethernet) 25 LED1 LED output (indicates speed status for Ethernet) 26 EEPROM_SCL EEPROM I2C clock signal 27 EEPROM_SDA EEPROM I2C data signal 28 INT Interrupt pin 29 AVDD_1.2V 1.2V analog power supply 30 AVSS_1.2V Ground for 1.2V analog power supply 31 VBUS USB Bus Power input 32 GND Ground pin

Circuit Principle Instructions

The RTL8153B-VB-CG operates as a bridge between USB and Ethernet, converting data from USB to Ethernet protocols for network communication. The basic operating principle involves the following steps:

USB Data Transfer: The USB host sends data to the RTL8153B's USB interface (pins 5, 6 for USB 2.0 or pins 7, 8 for USB 3.0). The controller processes the data and translates it into Ethernet packets.

Ethernet Communication: The processed Ethernet packets are transmitted through the TXD0 and TXD1 pins (pins 12 and 13) and received through the RXD0 and RXD1 pins (pins 14 and 15). The collision and carrier sense pins (pins 16 and 17) are used for Ethernet network status monitoring.

PHY Interface: Communication with the PHY (Physical Layer) is handled by MDIO (pin 20) and MDC (pin 21) for management, and the MDX0 and MDX1 pins (18 and 19) for data transfer.

LED Indicators: The status of the Ethernet link (speed, activity, etc.) is indicated by the LED pins LED0 and LED1 (pins 24 and 25).

Power Management : The power for the chip is supplied through VDD33 (pins 1 and 3), and the 1.2V analog supply is provided via AVDD_1.2V (pin 29).

Frequently Asked Questions (FAQs)

**What is the purpose of the **RTL8153B-VB-CG? The RTL8153B-VB-CG is a USB-to-Ethernet controller that enables Ethernet connectivity via a USB port. **What is the maximum Ethernet speed supported by the **RTL8153B-VB-CG? It supports Gigabit Ethernet speeds (1000 Mbps). **What is the power supply requirement for the **RTL8153B-VB-CG? It requires a 3.3V power supply (pin 1, pin 3), and a 1.2V analog supply (pin 29). **How does the *RTL8153B-VB-CG* interface with the USB system?** It connects via the USB 2.0 or USB 3.0 data pins (pins 5, 6, 7, and 8) to the USB host. **How can I reset the **RTL8153B-VB-CG? You can reset it by pulling the RESETB pin (pin 10) low. **What is the function of the *COL* pin (pin 16)?** The COL pin detects collision events in the Ethernet communication. **What is the function of the *CRS* pin (pin 17)?** The CRS pin is used to sense the presence of an Ethernet carrier signal. **What does the *WOL* pin (pin 23) do?** The WOL pin is used for Wake-on-LAN functionality, allowing the device to wake from low-power states upon receiving a network signal. **Can the *RTL8153B-VB-CG* support Wake-on-LAN?** Yes, it does support Wake-on-LAN via the WOL pin.

What are the LED pins for?

The LED0 and LED1 pins (pins 24 and 25) indicate the status of the Ethernet link (link status, activity, and speed).

**What type of EEPROM does the *RTL8153B-VB-CG* use?**

It uses an I2C EEPROM interface (pins 26 and 27 for SCL and SDA).

How do I monitor the PHY status?

The MDIO and MDC pins (pins 20 and 21) are used for PHY management, while MDX0 and MDX1 (pins 18 and 19) handle data communication.

**What is the function of the *CLK125* pin (pin 22)?**

The CLK125 pin outputs a 125 MHz clock signal used for Ethernet timing.

**What is the function of the *USB3_RET* pin (pin 9)?**

The USB3_RET pin is used for USB 3.0 return signaling.

**How do I configure the *RTL8153B-VB-CG* for high-speed operation?**

Ensure that the USB interface is operating at USB 3.0 speeds (pins 7, 8) for maximum throughput.

**Can the *RTL8153B-VB-CG* be used for both USB 2.0 and USB 3.0?**

Yes, it supports both USB 2.0 and USB 3.0 interfaces, switching automatically based on the connection type.

**How do I enable the *RTL8153B-VB-CG* in suspend mode?**

You can enable suspend mode by pulling the SUSPENDB pin (pin 11) low.

**Can the *RTL8153B-VB-CG* be used in low-power applications?**

Yes, the chip supports low-power operation and includes features like USB suspend mode and Wake-on-LAN.

**How do I monitor link speed on the **RTL8153B-VB-CG?

The LED1 pin (pin 25) will indicate the link speed (e.g., green for Gigabit Ethernet).

**How do I troubleshoot Ethernet connectivity issues with the **RTL8153B-VB-CG?

Check the TXD and RXD pins (pins 12, 13, 14, and 15), verify power supplies, and monitor the COL and CRS pins for network status.

This detailed explanation should cover the necessary aspects of the RTL8153B-VB-CG, including pin functions, circuit principles, and commonly asked questions related to its usage.