PS501 datasheet(30/42 Pages) MICROCHIP

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PS501

DS21818C-page 30

 2004 Microchip Technology Inc.

TABLE 9-5:

PS501 SETTINGS

Parameter

Name

Bytes

Lower

Limit

Upper

Limit

Typical

Value

Operational Description

AOMInt

255

The frequency of the auto-offset calibration cycle.

ConfigEOC

255

b01101001 Bit coded as follows:

Bit

Function

EOC on charge timer

6EOC on TCAVolt

Limit remcap to FCC

Set overcharge alarm at EOC

Load capacity with FCC at EOC

Trigger EOC on RSOC > SOCThreshold

Trigger EOC on average current

Trigger EOC on taper current

ConfigEOD

255

b01111000 Bit coded as follows:

Bit

Function

Evaluate EOD1 on fixed voltage (else table)

Set fully discharged bit on EOD1

Set capacity to residual capacity value immediately

upon EOD1 (EOD1Voltage or LUT voltage)

Set terminate discharge alarm on EOD1

(EOD1Voltage or LUT voltage)

Learn FCC at EOD1 (EOD1Voltage or LUT voltage)

TDA alarm at EOD2 (Vempty)

Set capacity to zero at EOD2 (Vempty)

Do not allow capacity to drop below EOD1Cap

ConfigCAP

255

11010100 Bit

Function

Compensate remcap – the displayed remcap

actually equals FCC minus capacity used, minus

residual capacity due to temperature. remcap is

compensated for temperature.

Remcap decrease only – when compensating, if

temperature changed causing a decrease in residual

capacity, do not let remcap rise to reflect this.

Instead, hold it steady until discharge catches up.

This is so user does not see capacity increase while

discharging (though usable capacity may increase if

the temperature changes, user would be confused).

Use compensated FCC – use compensated FCC

to compute RSOC. Allows compensated RSOC to

equal 100% at full charge (delete).

Limit RSOC to 99% until EOC.

Report compensated FCC – the compensated FCC

is reported in SBData to allow for externally

calculated RSOC (delete).

Set capacity to positive immediately upon

charging. If discharged below zero, this allows

capacity to count up immediately upon charging.

Learn unconditionally – relearn FCC no matter

what. Typically we have a max. current and a max.

error limitation on relearn. This would take away

the limitations. Typically used for testing only.

Self-discharge disable.

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