UCS81003 datasheet(79/108 Pages) MICROCHIP

79 / 108 page

 2014 Microchip Technology Inc.

DS20005334A-page 79

UCS81003

U-x

R/W-0

R-0

R/W-1

—

CS_TO_DIS

CS_EM_TO<1:0>

CS_FRST

RESERVED

CSEM_DIS

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 7-6

Unimplemented

bit 5

CS_TO_DIS: Disables the Emulation Timeout timer when the Custom Charger Emulation profile is

applied during the DCE Cycle. If the EM_TO_DIS is set, this bit will have no effect (Note 1).

The Emulation Timeout timer is disabled when the Custom charger emulation profile is applied

during the DCE Cycle. When the Custom charger emulation profile is being applied, the UCS81003

will be constantly monitoring the IBUS current. When the IBUS current is greater than IBUS_CHG,

regardless of the reason, then the Custom Charger Emulation profile will accepted. If the portable

device does not draw more than IBUS_CHG current, then the UCS81003 will continue waiting until

this bit is cleared.

The Emulation Timeout timer is enabled when the Custom charger emulation profile is applied

during the DCE Cycle and the EM_TO_DIS bit is not set

bit 4-3

CS_EM_TO<1:0>: Determines the tEM_TIMEOUT value, as shown below. Is used when the Custom char-

ger emulation profile is used during the DCE Cycle.

= 0.8s

= 1.6s

= 6.4s

= 12.8s

bit 2

CS_FRST: Disables the Custom charger emulation profile.

The Custom charger emulation profile is the first of the profiles applied during the DCE Cycle.

The Custom charger emulation profile is the last of the profiles applied during the DCE Cycle.

bit 1

RESERVED: Do not change. This bit will read ‘0’ and should not be written to a logic ‘1’.

bit 0

CSEM_DIS: Determines whether the Custom charger emulation profile is placed first or last in the DCE Cycle.

The Custom charger emulation profile is not enabled.

= The Custom charger emulation profile is enabled.

Note 1:

If the CS_TO_DIS bit is set and the Custom charger emulation profile was accepted during the DCE cycle,

a removal is not detected. To avoid this issue, re-enable the emulation timeout after applying any test pro-

files and charging with the 'final' profile.

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