DS250DF810: ds250df810

Yes, 7-bit addressing is supported over the retimer SMBus interface. See description below.

The address byte sent by the SMBus master over the SMBus is always 8 bits long. The least-significant bit indicates whether the address is for a write operation, in which the master will output data to the SMBus to be read by the slave, or a read operation, in which the slave will output data to the SMBus to be read by the master. if the least-significant bit is a 0, the address is for a write operation. If it is a 1, the address is for a read operation. Accordingly, SMBus addresses are sometimes referred to as seven-bit addresses. To produce the write address for the SMBus, the seven-bit address is left-shifted by one bit. To produce the read address, it is left shifted by one bit and the least-significant bit is set to 1. Table 1 shows the seven-bit addresses corresponding to each set of address line values.

Table 1. Retimer SMBus Write Address Assignment

Table 1. Retimer SMBus Write Address Assignment (continued)

Cordially,

Rodrigo Natal

HSSC Applications Engineer