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
Not Recommended for New Designs
bq24725
SLUS702A –JULY 2010–REVISED NOVEMBER 2010 www.ti.com
Figure 18. SMBus Write Timing
Figure 19. SMBus Read Timing
Battery-Charger Commands
The bq24725 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 bq24725. The
ManufacturerID() command always returns 0x0040H and the DeviceID() command always returns 0x0008H.
Table 2. Battery Charger Command Summary
REGISTER ADDRESS REGISTER NAME READ/WRITE DESCRIPTION POR STATE
0x12H ChargeOption() Read or Write Charger Options Control 0x7904H
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 0x0008H
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