UCS1002-1 datasheet(72/116 Pages) MICROCHIP

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Programmable USB Port Power Controller with Charger Emulation

Datasheet

Revision 1.4 (07-16-13)

SMSC UCS1002

DATASHEET

10.2

Total Accumulated Charge Registers

The Total Accumulated Charge registers store the total accumulated charge delivered from the VS

source to a portable device. The bit weighting of the registers is given in mA-hrs. The register value

is reset to 00_00h only when the RATION_RST bit is set or if the RATION_EN bit is cleared. This value

will be retained when the device transitions out of the Active state and resumes accumulation if the

device returns to the Active state and charge rationing is still enabled.

These registers are updated every one (1) second while the UCS1002 is in the Active power state.

Every time the value is updated, it is compared against the target value in the Charge Rationing

Threshold registers (see Section 10.6).

This data is retained in the Sleep state.

Table 10.3 Total Accumulated Charge Registers

ADDR

R/W

DEFAULT

01h

Total

Accumulated

Charge High

Byte

90968

45484

22742

11371

5685

2843

1421

710.7

00h

02h

Total

Accumulated

Charge Middle

High

355.4

177.7

88.84

44.42

22.21

11.10

5.552

2.776

00h

03h

Total

Accumulated

Charge Middle

Low Byte

1.388

0.694

0.347

0.173

0.086

0.0

434

0.0

2169

0.01

084

00h

04h

Total

Accumulated

Charge Low

Byte

0.00

5422

0.00

271

------

00h

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