DS280DF810ABVT datasheet(31/51 Pages) TI1

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DS280DF810

www.ti.com

SNLS538A – SEPTEMBER 2016 – REVISED OCTOBER 2019

Product Folder Links: DS280DF810

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Programming (continued)

•

Channel selection and share enabling – Registers 0xFC and 0xFF

•

Device and version information – Registers 0xEF-0xF3

•

Reserved or unused registers – all other addresses

corresponding bit in register 0xFC. Note that more than one channel may be written to by setting multiple bits in

time. If multiple channels are selected when attempting to perform an SMBus read, the device will return 0xFF.

modify broadcast write type commands can be accomplished by setting register 0xFF to 0x03 and selecting a

single channel in register 0xFC. This type of configuration allows for the reading of a single channel's register

information and then writing to all channels with the modified value. Register 0xFF bit 0 is used to select the

shared register page or the channel register page for the channels selected in register 0xFC.

TI repeaters and retimers have a vendor ID register (0xFE) which will always read back 0x03. In addition, there

are three device ID registers (0xF0, 0xF1, and 0xF3). These are useful to verify that there is a good SMBus

connection between the SMBus master and the DS280DF810.

8.6 Register Maps

Refer to the DS280DF810 Programming Guide (SNLU182) for the complete register map and example

programming sequences.

The DS280DF810 has a vendor ID register (0xFE), which will always read back 0x03. In addition, there are four

device ID registers (0xEF, 0xF0, 0xF1, and 0xF3). Reading these five registers and confirming the expected

value is a good way to verify SMBus communications between the SMBus Master and the DS280DF810. In

addition, writing a value to channel select Reg_0xFC and confirming the correct value is read back is a good way

to verify SMBus write communications with the DS280DF810.

Table 7. Device and Vendor ID Registers

Global Register

Description

0xEF

TI device ID (Quad count).

DS280DF810: 0x0C

0xF0

TI version ID.

DS280DF810: 0x31

0xF1

TI device ID.

DS280DF810: 0x13

0xF3

TI channel and share version ID. Contains 0x00.

0xFE

TI vendor ID. Contains 0x03.

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