ADC 6021 Specifiche Scaricare il pdf (Pagina 71)

MYXPM6021*

Revision 1.1 - 10/21/14

*Advanced information. Subject to change without notice.

MYXPM6021*

Form #: CSI-D-685 Document 011

points.NotethatwhenusingtheBATIDcomparatortosensebatteryinsertion/removal,thereareseparatedebounce

timesforinsertionandremoval.Thisistoallowforsufcientpower-upsequencingofUSBPHYrelatedcomponentson

insertion,andalsoallowforquickdetectionofbatteryremovalforSIMcardearlywarning(viaSDWN_B).

Table 42: BATID Comparator Threshold

Parameter Description Min Typ Max Unit

V’BATIDREFH BATID Rising threshold ( L->H,

indicating battery removal)

Typ-

0.025

0.9*Vref Typ+

0.025

V’BATIDREFL BATID Falling threshold ( H->L,

indicating battery insertion)

Typ-

0.025

0.8*Vref Typ+

0.025

tDEBOUNCE

insert

BATID Presence Comparator

Debouncing Time (Insertion)

90 100 110 ms

tDEBOUNCE

remove

BATID Presence Comparator

Debouncing Time (Removal)

30 62 μs

The second method detecting a battery removal is while monitoring the battery voltage itself via a battery voltage

comparator.Thetablebelowspeciesthethresholdsofthebatteryremovalcomparator.

Table 43: VBAT removal Comparator Threshold

Parameter Description Min Typ Max Unit

V’BATRMREFH VBAT Rising Threshold ( L->H,

indicating battery insertion)

2.075 2.1 2.125 V

V’BATRMREFL VBAT Falling Threshold ( H->L,

indicating battery removal)

1.975 2.0 2.025 V

tDEBOUNCE Battey Voltage Comparator Debouncing

Time (Insertion and removal)

90 100 110 ms

12.2.2 Battery Pack Interface

TheBATIDpincanbeusedtosupportthreepossiblefunctions:digitalbatterycommunication,analogmeasurementofan

IDresistance,and/oranalogbatterypresencedetection.

Thisdigitalcommunicationisintendedtobeleftgeneric,withsimplepassthroughlevelshiftersto/fromthehoston2

discretepins.Theintentistobeprotocolagnostictoprovidesupportformanystandards.Thegurebelowillustratesthe

multipleusesofBATID.

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