PS501 datasheet(23/42 Pages) MICROCHIP

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 2004 Microchip Technology Inc.

DS21818C-page 23

PS501

8.1.24

CycleCount (0x17)

CycleCount is updated to keep track of the total usage

of the battery. CycleCount is increased whenever an

amount of charge has been delivered to, or removed

from, the battery equivalent to the full capacity.

8.1.25

DesignCapacity (0x18)

Returns the theoretical capacity of a new pack. The

DesignCapacity value is expressed in either current or

power, depending on the setting of the BatteryMode’s

CAPACITY_MODE bit.

8.1.26

DesignVoltage (0x19)

Returns the theoretical voltage of a new pack (mV).

8.1.27

SpecificationInfo (0x1a)

Returns the version number of the Smart Battery

specification the battery pack supports.

8.1.28

ManufactureDate (0x1b)

This function returns the date the cell pack was manu-

factured in a packed integer. The date is packed in the

following fashion: (year-1980) * 512 + month * 32 + day.

8.1.29

SerialNumber (0x1c)

This function is used to return a serial number. This

number, when combined with the ManufacturerName,

the DeviceName and the ManufactureDate, will

uniquely identify the battery.

8.1.30

ManufacturerName (0x20)

This function returns a character array containing the

battery manufacturer’s name.

8.1.31

DeviceName (0x21)

This function returns a character string that contains

the battery’s name.

8.1.32

DeviceChemistry (0x22)

This function returns a character string that contains

the

battery’s

chemistry.

For

example,

the

DeviceChemistry function returns “NiMH”, the battery

pack would contain nickel metal hydride cells. The

following is a partial list of chemistries and their

expected abbreviations. These abbreviations are not

case sensitive.

Lead Acid: PbAc

Lithium Ion: LION

Nickel Cadmium: NiCd

Nickel Metal Hydride: NiMH

Nickel Zinc: NiZn

Rechargeable Alkaline-Manganese: RAM

Zinc Air: ZnAr

8.1.33

ManufacturerData (0x23)

This function allows access to the manufacturer data

contained in the battery (data).

8.1.34

OptionalMfgFunction

The PS501 includes new SBData functions using the

OptionalMfgFunction command codes. The command

codes, 3C hex to 3F hex, report the individual cell volt-

ages as measured by the analog-to-digital converter.

These voltages are reported in mV and are calculated

to include compensation for calibration and sense

resistance voltage drops. Only one cell voltage is mea-

sured per measurement cycle (depending on Run or

Sample mode operation).

Rapid voltage changes will see some variation in volt-

ages due to the delay of measurement. These voltage

values may be used for cell balancing or other

functions as the Host system may desire.

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