The LT7182S PMBus/I2C Reference Manual describes the digital communications capabilities of the LT®7182S, including the functionality of each LT7182S PMBus command.
The LT7182S serial interface is PMBus compliant and can operate at any frequency between 10kHz and 1MHz. The device address is configurable using the EEPROM and/or a configuration resistor on ASEL. The serial interface supports protocols defined in the PMBus and SMBus specifications, including Send Byte, Write Byte, Write Word, Block Write, Read Byte, Read Word, Block Read, and Alert Response Address.
The manual details various addressing modes including device addressing, global addressing, rail addressing, and zone write addressing. It also covers communication protection features such as Packet Error Checking (PEC) and communication recommendations for handling busy conditions and clock stretching.
| Operating Frequency Range | 10kHz to 1MHz |
|---|---|
| Default Device Address | 0x7C |
| Global Address 1 | 0x5A |
| Global Address 2 | 0x5B |
| Zone Write Address | 0x37 |
The device supports PMBus and SMBus specifications, including Send Byte, Write Byte, Write Word, Block Write, Read Byte, Read Word, Block Read, and Alert Response Address.
The device address is set by a combination of the ASEL configuration pin and the MFR_LADDRESS command.
The device ignores the command, sets the CML bit in the STATUS_BYTE and STATUS_WORD commands, sets the appropriate bit in the STATUS_CML command, and pulls the ALERT pin low.