UCS1003-2 datasheet(84/138 Pages) MICROCHIP

84 / 138 page

UCS1003-1/2/3

DS20005346B-page 84

 2014-2015 Microchip Technology Inc.

10.9

TDET_CHARGE Configuration

The TDET_CHARGE Configuration register controls

the tDC_TEMP and tDET_CHARGE timing. The tDC_TEMP

timer is started whenever the temperature exceeds

TREG. This timer is meant to give the system time to

cool at the lower ILIM setting before changing ILIM

again. The tDET_CHARGE timer is started whenever the

VBUS voltage is discharged and the bypass switch is

reactivated. This timer is meant to be a delay to allow

the VBUS capacitor to charge before detecting an

Attach Detection event.

If tDET_CHARGE time is increased greater than 800 ms,

larger bus capacitors can be accommodated;

however, with a portable device present and PWR_EN

disabled, a Removal Detection event, and then

another Attach Detection event will occur.

The contents of this register are retained in Sleep.

Name

Bits Address

Cof

Default

TDET_CHARGE

Configuration

81Fh

R/W

03h

U-0

R/W-0

R/W-1

—

DC_TEMP_SET<1:0>

DET_CHARGE_SET<2:0>

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-5

Unimplemented:

Read as ‘0’

bit 4-3

DC_TEMP_SET<1:0>:

tDC_TEMP Time Determination bits

= 200 ms

= 400 ms

= 800 ms

= 1600 ms

bit 2-0

DET_CHARGE_SET<2:0>:

tDET_CHARGE Time Determination bits

000

= 200 ms

001

= 400 ms

010

= 600 ms

011

= 800 ms

100

= 1000 ms

101

= 1200 ms

110

= 1400 ms

111

= 2000 ms

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