Setup
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6.2
SMBus Mode
The SMBus can also be used to control the DS125BR111 devices. This method has the advantage of
independent control and finer signal conditioning granularity.
Table 2. Typical DS125BR111 Register Writes
Register Address
Function
Description
Register 0x0F
CHA EQ
Write EQ setting 03’h
Register 0x11
CHA VOD_DB
Write VOD_DB setting for bits [2:0] = 000’b
Register 0x23
CHA VOD
Write VOD setting for bits [4:2] = 111’b
Register 0x06
CRC DIS
Write bit [3] = 1’b send register updates directly to channel without any CRC check.
6.3
EEPROM Mode
A serial EEPROM may also be used to configure one or more DS125BR111 devices. This configuration
mode is accessed by setting the ENSMB 4-level input to FLOAT. For additional information please see the
device datasheet.
6
DS125BR111EVM User's Guide SMA Evaluation Kit
SNLU168A – August 2014 – Revised August 2014
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