bq78350-R1

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SLUSCD0 – AUGUST 2015

9.5 Programming

9.5.1 Physical Interface

The bq78350-R1 uses SMBus 1.1 with packet error checking (PEC) as an option and is used as a slave only.

9.5.2 SMBus Address

The bq78350-R1 determines its SMBus 1.1 slave address through a voltage on SMBA, Pin 30. The voltage is set

with a pair of high value resistors if an alternate address is required and is measured either upon exit of POR or

when system present is detected. ADREN, Pin 29, may be used to disable the voltage divider after use to reduce

power consumption.

9.5.3 SMBus On and Off State

The bq78350-R1 detects an SMBus off state when SMBC and SMBD are logic-low for

≥ 2 seconds. Clearing this

state requires either SMBC or SMBD to transition high. Within 1 ms, the communication bus is available.

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