UCS1002-3 datasheet(57/114 Pages) MICROCHIP

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DS20006852A-page 57

UCS1002-3

10.4.2

EMULATION CONFIGURATION

The contents of this register are retained in Sleep.

bit 3

RATION_EN: Ration Enable – enables charge rationing functionality and power monitoring.

1 = Charge rationing is enabled (see Section 7.4 “Battery Full”).

0 = Charge rationing is disabled. The Total Accumulated Charge registers are cleared to 00_00h

and current data is no longer accumulated. If the Total Accumulated Charge registers have

reached the Charge Rationing Threshold (see Section 10.6 “Charge Rationing Threshold

Registers”), the applied response is removed as though the charge rationing is placed on reset.

This also clears the RATION status bit (if set).

bit 2

RATION_RST: Ration Reset – resets the charge rationing functionality. When this bit is set to ‘1’, the

Total Accumulated Charge registers are reset to 00_00h. In addition, when this bit is set, the RATION

status bit is cleared and, if there are no other errors or active indicators, the ALERT# pin is released.

1 = EM_EN is Logic 1

0 = EM_EN is Logic 0

bit 1-0

RATION_BEH[1:0]: Controls the behavior when the power rationing threshold is reached as shown

in Table 7-1.

00 = Report

01 = Report and Disconnect

10 = Disconnect and Go to Sleep

11 = Ignore

GENERAL CONFIGURATION REGISTER (ADDRESS 15h) (CONTINUED)

EMULATION CONFIGURATION REGISTER (ADDRESS 16h)

R/W-1

U-x

R/W-0

R/W-1

R/W-0

DIS_TO

—

EM_TO_DIS

EM_RETRY

EM_RESP

EM_RESET_TIME[1:0]

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

DIS_TO: Disable Timeout – Disables the Timeout and Idle Reset functionality (see Section 11.2.1.6

“SMBus Timeout and Idle Reset”).

1 = The Timeout and Idle Reset functionality is disabled. This is used for I2C compliance.

0 = The Timeout and Idle Reset functionality is enabled.

bit 6-5

Unimplemented

bit 4

EM_TO_DIS: Emulation Timeout Disable – disables the emulation circuitry timeout for all charger

emulation profiles in the DCE Cycle. There is a separate bit to enable/disable the emulation timeout for

the Custom Charger Emulation profile (Register 10-35); however, if the EM_TO_DIS bit is set, the

emulation timeout is also disabled for the Custom charger emulation profile. (Note 1)

1 = Emulation timeout is disabled during the DCE Cycle. The applied charger emulation profile does

not exit as a result of an emulation timeout event. The IBUS current is continuously checked and

if it exceeds the IBUS_CHG threshold for any reason, the charger emulation profile is accepted.

0 = Emulation timeout is enabled during the DCE Cycle. An individual charger emulation profile is

applied and maintained for the duration of the tEM_TIMEOUT value. When this timer expires, the

UCS1002-3 determines whether the charger emulation profile is successful and takes appropriate

action.

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