UCS1003-3 datasheet(63/138 Pages) MICROCHIP

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 2014-2015 Microchip Technology Inc.

DS20005346B-page 63

UCS1003-1/2/3

During Power-on Reset (POR), the default values are

stored in the registers. A POR is initiated when power

is first applied to the part and the voltage on the VDD

supply surpasses the VDD_TH level, as specified in the

electrical characteristics. Any reads to undefined

registers will return 00h. Writes to undefined registers

will not have an effect.

When a bit is “set”, this means that the user writes a

logic ‘1’ to it. When a bit is “cleared”, this means that the

user writes a logic ‘0’ to it.

10.1

Current Measurement Register

(Address 00h)

The Current Measurement register stores the measured

current value delivered to the portable device (IBUS). This

value is updated continuously while the device is in the

Active power state. The bit weights are in mA and the

range is from 0 mA to 2988.6 (the maximum value

corresponds to 255 LSBs, where1 LSB = 11.72 mA).

This data will be cleared when the device enters the

Sleep or Detect states. This data will also be cleared

whenever the port power switch is turned off (including

during emulation or any time that VBUS is discharged).

49h

Custom Emulation

Stimulus 3 – Configuration 1

R/W

Sets the stimulus and timing for

Stimulus 3

00h

117

4Ah

Custom Stimulus/Response

Pair 3 – Configuration 2

R/W

Sets the response and magnitude for

Stimulus 3

00h

118

4Bh

Custom Stimulus/Response

Pair 3 – Configuration 3

R/W

Sets the threshold and pull-up/pull-down

settings for Stimulus 3

00h

120

4Ch

Custom Stimulus/Response

Pair 3 – Configuration 4

R/W

Sets the resistor ratio for Stimulus 3

00h

121

50h

Applied Current-Limiting

Behavior

Indicates the applied current-limiting

behavior

82h

122

51h

Custom Current-Limiting

Behavior Configuration

R/W

Controls the custom current-limiting

behavior

82h

123

FDh

Product ID

Stores a fixed value that identifies each

product

4Eh

123

FEh

Manufacturer ID

Stores a fixed value that identifies

Microchip

5Dh

123

FFh

Revision

Stores a fixed value that represents the

revision number

82h

123

TABLE 10-1:

Address

R/W

Function

Default

Value

Page

No.

Name

Bits Address Cof Default

Current Measurement

00h

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