Datasheet

A =START CONDITION E=SLAVEPULLSSMBDATA LINELOW I= ACKNOWLEDGECLOCKPULSE
B=MSBOF ADDRESSCLOCKEDINTOSLAVE F= ACKNOWLEDGEBIT CLOCKEDINTOMASTER J=STOP CONDITION
C=LSBOF ADDRESSCLOCKEDINTOSLAVE G=MSBOFDATA CLOCKEDINTOMASTER K=NEWSTART CONDITION
D=R/WBIT CLOCKEDINTOSLAVE H=LSBOFDATA CLOCKEDINTOMASTER
A B C D EF G H IJK
t
LOW
t
HIGH
SMBCLK
SMBDATA
bq24725A
www.ti.com SLUSAL0 –SEPTEMBER 2011
Figure 17. SMBus Write Timing
Figure 18. SMBus Read Timing
Battery-Charger Commands
The bq24725A supports six battery-charger commands that use either Write-Word or Read-Word protocols, as
summarized in Table 2. ManufacturerID() and DeviceID() can be used to identify the bq24725A. The
ManufacturerID() command always returns 0x0040H and the DeviceID() command always returns 0x000BH.
Table 2. Battery Charger Command Summary
REGISTER ADDRESS REGISTER NAME READ/WRITE DESCRIPTION POR STATE
0x12H ChargeOption() Read or Write Charger Options Control 0xF902H
0x14H ChargeCurrent() Read or Write 7-Bit Charge Current Setting 0x0000H
0x15H ChargeVoltage() Read or Write 11-Bit Charge Voltage Setting 0x0000H
0x3FH InputCurrent() Read or Write 6-Bit Input Current Setting 0x1000H
0XFEH ManufacturerID() Read Only Manufacturer ID 0x0040H
0xFFH DeviceID() Read Only Device ID 0x000BH
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