UCS81003 datasheet(75/108 Pages) MICROCHIP

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 2014 Microchip Technology Inc.

DS20005334A-page 75

UCS81003

(ADDRESS 39H)

U-x

R-0

—

S3_TD_TYPE

S3_TD<2:0>

STIM3<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

Unimplemented

bit 6

S3_TD_TYPE: Determines the behavior of the stimulus timer.

The stimulus timer controls how long the response is applied after the stimulus is detected. The

response is applied immediately and held for the duration of the timer, then removed (if the stimulus

has been removed).

The stimulus timer is a delay from when the stimulus is detected until the response is performed.

bit 5-3

S3_TD<2:0>: Determines the Stimulus 3 tSTIM_DEL value as shown below:

000

=0 ms

001

=1 ms

010

=5 ms

011

= 10 ms

100

= 20 ms

101

= 40 ms

110

= 80 ms

111

= 100 ms

bit 2-0

STIM3<2:0>: Determines the Stimulus 3 that is used as shown below. Note that the lower threshold for

the window comparator option is fixed at 400 mV and only applies to the DPOUT pin. This setting cannot

be used for the DMOUT port.

000

=VBUS voltage ready to be applied before port power switch is closed. Next stimulus will not wait

for this to be removed.

001

= DPOUT voltage is greater than the threshold (S3_TH).

010

= Window comparator. DPOUT voltage is less than the threshold (S3_TH) and DPOUT voltage

greater than the fixed threshold.

011

=DMOUT voltage is greater than the threshold (S3_TH).

100

= Do not use.

101

= Do not use.

110

=DPOUT voltage is greater than the threshold (S3_TH).

111

= Voltage is present after the port power switch is closed. Next stimulus will not wait for this to

be removed.

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