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2015-08-0009

PT0514-4

08/24/15

18

PI5USB2544

USB Charging Port Controller and Detection Power Switch

Device Control Pins Truth Table

Device Control Pins Table lists all valid bias combinations for the four control pins CTL1, CTL2, CTL3 and ILIM_SEL pins

and their corresponding charging mode. It is important to note that the Device Control Pins Table purposely omits matching

charging modes of the PI5USB2544 with global power states (S0-S5) as device is agnostic to system power states. The

PI5USB2544 monitors its CTL inputs and will transition to whatever charging state it is commanded to go to (except when

LS/FS HID device is detected). For example if sleep charging is desired when system is in standby or hibernate state then user

must set PI5USB2544 control pins to correspond to DCP_Auto charging mode per below table. When system is put back to

operation mode then set control pins to correspond to SDP or CDP mode and so on.

PI5USB2544 Device Control Pins Truth Table

CTL1

CTL2

CTL3

ILIM_SEL

MODE

Current Limit

Setting

Comment

0

0

0

0

Discharge

NA

OUT held low

0

0

0

1

Discharge

NA

0

x

1

x

DCP_Auto

ILIM_HI

Data lines disconnected

0

1

0

0

SDP1

ILIM_LO

Data lines connected

0

1

0

1

SDP1

ILIM_HI

0

1

1

0

DCP_Auto

ILIM_HI

Data lines disconnected

0

1

1

1

DCP_Auto

ILIM_HI

Data lines disconnected

1

0

0

0

DCP_Shorted

ILIM_LO

Device forced to stay in DCP BC1.2

charging mode

1

0

0

1

DCP_Shorted

ILIM_HI

1

0

1

0

Divider-1A

ILIM_LO

Device forced to stay in Divider-1A

charging mode

1

0

1

1

Divider-1A

ILIM_HI

1

1

0

0

SDP1

ILIM_LO

Data lines connected

1

1

0

1

SDP1

ILIM_HI

1

1

1

0

SDP2

(1)

ILIM_LO

1

1

1

1

CDP

(1)

ILIM_HI

Data lines connected

Note:

Below tables can be used as an aid to program the PI5USB2544 per system states however not restricted to below settings only.

PI5USB2544 Control Pin Setting Matched to System Power States

System Global

Power State

Charging Mode

CTL1

CTL2

CTL3

ILIM_SEL

Current Limit

Setting

S0

SDP1

1

1

0

1 or 0

ILIM_HI/ILIM_LO

S0

SDP2, no discharge to/from CDP

1

1

1

0

ILIM_LO

S0

CDP

1

1

1

1

ILIM_HI

S3/S4/S5

Auto mode

0

0

1

0

ILIM_HI

S3

Auto mode, keyboard/mouse wake up,

no load detection

0

1

1

0

ILIM_HI

S3

SDP1, keyboard/mouse wake up

0

1

0

1 or 0

ILIM_HI/ILIM_LO