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2015-08-0012

PT0513-3

8/31/15

19

PI5USB2544A, PI5USB2546A

USB Charging Port Controller and Load 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 PI5USB2544A/2546A with global power states (S0-S5) as device is agnostic to system power states.

The PI5USB2544A/2546A 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 PI5USB2544A/2546A 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.

PI5USB2546A Device Control Pins Truth Table

CTL1

CTL2

CTL3

ILIM_SEL

MODE

Current

Limit Setting

/STATUS Output

(Active low)

Comment

0

0

0

0

Discharge

NA

OFF

OUT held low

0

0

0

1

Discharge

NA

OFF

0

0

1

0

DCP_Auto

ILIM_HI

OFF

Data lines disconnected

0

0

1

1

DCP_Auto

ILIM_HI

(1)

DCP load present

(2)

Data lines disconnected and

load detect function active

0

1

0

0

SDP1

ILIM_LO

OFF

Data lines connected

0

1

0

1

SDP1

ILIM_HI

OFF

0

1

1

0

DCP_Auto

ILIM_HI

OFF

Data lines disconnected

0

1

1

1

DCP_Auto

ILIM_HI

DCP load present

(3)

Data lines disconnected and

load detect function active

1

0

0

0

DCP_Shorted

ILIM_LO

OFF

Device forced to stay in

DCP BC1.2 charging mode

1

0

0

1

DCP_Shorted

ILIM_HI

OFF

1

0

1

0

Divider-1A

ILIM_LO

OFF

Device forced to stay in

Divider-1A charging mode

1

0

1

1

Divider-1A

ILIM_HI

OFF

1

1

0

0

SDP1

ILIM_LO

OFF

Data lines connected

1

1

0

1

SDP1

ILIM_HI

OFF

1

1

1

0

SDP2

(4)

ILIM_LO

OFF

1

1

1

1

CDP

(4)

ILIM_HI

CDP load present

(5)

Data lines connected and

load detect active

Note:

(1)

PI5USB2546A: Current limit (IOS) is automatically switched between IOS_PW and the value set by ILIM_HI according to the Load Detect –Power

Wake functionality.

(2)

DCP Load present governed by the “Load Detection – Power Wake” limits.

(3)

DCP Load present governed by the “Load Detection – Non Power Wake” limits.

(4)

No OUT discharge when changing between 1111 and 1110.

(5)

CDP Load present governed by the “Load Detection – Non Power Wake” limits and BC1.2 primary detection.