Popular Keywords


The System Management Bus (SMBus), derived from the I2C bus, is a bus system composed of two signals. Intel defined SMBus in 1995, encompassing Clock, Data, and instructions based on the Philips I2C serial bus protocol, with a clock frequency ranging from 10KHz to 100KHz.

Its primary applications include power management, temperature sensors, and EEPROM transmission in laptops.

In laptop applications, SMBus finds widespread use in power management systems. Through SMBus, laptops can effectively monitor and control aspects such as battery status, charging control, and energy management, contributing to enhanced battery life, optimized energy utilization, and ensured system stability.

Moreover, SMBus serves to connect temperature sensors, playing a crucial role in monitoring system temperature in laptops. This allows for fan control or other cooling measures as needed to ensure the system operates within a safe temperature range.

In terms of EEPROM transmission, SMBus provides a serial communication interface for reading and writing data in EEPROM. This functionality is vital for managing and configuring registers, including storing system settings and hardware information.

SMBus employs two main signal lines, SMBCLK (Clock), and SMBDATA (Data). SMBus typically operates at a voltage of 3V, ensuring normal operation while complying with the electrical characteristics and requirements of devices.



SMBCLK: Clock for SMBus data transmission.
SMBDATA: Data for SMBus data transmission.

Startup: Check whether to use PEC analysis.

Address: Show 8-bit addressing (include 7-bit addressing and 1-bit R/W).


MCTP: Show SMBus analysis in report area.
Show SBS (Smart Battery System): Show the Smart Battery System: voltage, electric current and the manufacturer.
Show SPD(Serial Presence Detect):Report window show the configuration of memory module(DDR3, DDR2, DDR, SPD SDRAM) in EEPROM.

Ignore glitch: Ignore the glitch caused by slow transitions during analysis.


We use cookies to elevate your user experience and enhance the quality of our site. To find out more or adjust cookie settings, click here .