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UCS81003 Datasheet(PDF) 70 Page - Microchip Technology

Part # UCS81003
Description  Automotive USB Port Power Controller with Charger Emulation
PDF  108 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

UCS81003 Datasheet(HTML) 70 Page - Microchip Technology

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UCS81003
DS20005334A-page 70
 2014 Microchip Technology Inc.
bit 3-0
S1_TH<3:0>: Defines the threshold value, as shown below for the specified stimulus. If the stimulus is
VBUS voltage is ready to be applied or applied (i.e., STIM1<2:0> = 000b or 111b), the threshold
value is ignored.
0000
= 400 mV
0001
= 400 mV
0010
= 400 mV
0011
= 300 mV
0100
= 400 mV
0101
= 500 mV
0110
= 600 mV
0111
= 700 mV
1000
= 800 mV
1001
= 900 mV
1010
= 1400 mV
1011
= 1600 mV
1100
= 1800 mV
1101
= 2000 mV
1110
= 2200 mV
1111
= Do not use.
Note 1:
The Legacy charger emulation profiles do not use these settings. Whenever a Legacy charger emulation
profile is applied within the DCE Cycle, these controls will not be updated and should be ignored. These
settings are only used by the BC1.2 CDP and DCP charger emulation profiles.
REGISTER 10-27: PRELOADED EMULATION STIMULUS 1 CONFIGURATION 4 REGISTER
(ADDRESS 34H)(Note 1)
U-x
U-x
U-x
U-x
U-x
R-0
R-1
R-0
—
—
—
—
—
S1_RATIO<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 7-3
Unimplemented
bit 2-0
S1_RATIO<2:0>: Determines the voltage divider ratio, as shown below, when the stimulus response is
set to connect a voltage divider (i.e., S1_R1<3:0> = 0110b, 1001b, or 1100b).
000
=0.25
001
=0.33
010
=0.4
011
=0.5
100
=0.54
101
=0.6
110
=0.66
111
= Do not use.
Note 1:
The BC1.2 DCP and CDP charger emulation profiles do not use this control. Whenever the BC1.2 CDP or
DCP charger emulation profile is applied, these controls will not be updated and should be ignored. These
settings are only used by the Legacy charger emulation profiles.
REGISTER 10-26: PRELOADED EMULATION STIMULUS 1 CONFIGURATION 3 REGISTER
(ADDRESS 33H)(Note 1) (CONTINUED)



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