Intel 41210 manual System Management Bus Interface, SMBus Address Assignments, Bit Value

System Management Bus Interface

System Management Bus Interface 8

The SMBus interface allows the Intel® 41210 Serial to Parallel PCI Bridge (called hereafter the 41210 Bridge or 41210) to serve as a slave device residing on the SMBus for system management functions and provides for full access to the configuration registers in each function. The SMBus implementation has the following characteristics:

• Is based on the System Management Bus Specification, Revision 2.0 (SMBus)

• Allows for slave-mode operation only

• Provides full read/write access to internal configuration and memory spaces

The SMBus address is set up on PERST# by sampling the SMBUS pins. When the pins are sampled, the resulting address is assigned as shown in Table 25:

Table 25.	SMBus Address Assignments
	Bit	Value
	7	1
	6	1
	5	SMBUS[5]
	4	0
	3	SMBUS[3]
	2	SMBUS[2]
	1	SMBUS[1]

Intel® 41210 Serial to Parallel PCI Bridge Developer’s Manual 55