AM3874 datasheet(124/361 Pages) TI

124 / 361 page

AM3874, AM3871

SPRS695C – SEPTEMBER 2011 – REVISED DECEMBER 2013

www.ti.com

3.2.21 USB

Table 3-42. USB Terminal Functions

SIGNAL

TYPE(1)

OTHER(2) (3)

MUXED

DESCRIPTION

NAME

NO.

USB0

–

USB0 bidirectional data differential signal pair

USB0_DP

AG11

A I/O

–

VDDA_USB_3P3

[plus/minus].

–

When the USB0 PHY is powered down, these pins

USB0_DM

AH11

A I/O

–

VDDA_USB_3P3

should be left unconnected.

USB0 OTG identification input.

–

USB0_ID

AG10

A I

–

When the USB0 PHY is powered down, this pin should

VDDA_USB_3P3

be left unconnected.

USB0 charger enable.

–

USB0_CE

AH10

A O

–

When the USB0 PHY is powered down, this pin should

VDDA_USB_3P3

be left unconnected.

5-V USB0 VBUS comparator input.

This analog input pin senses the level of the USB VBUS

–

USB0_VBUSIN

AG12

A I

–

voltage and should connect directly to the USB VBUS

VDDA_USB_3P3

voltage. When the USB0 PHY is powered down, this pin

should be left unconnected.

When this pin is used as USB0_DRVVBUS and the

USB0 Controller is operating as a Host, this signal is

GP0

used by the USB0 Controller to enable the external

USB0_DRVVBUS/

IPD

AF11

PINCNTL270

VBUS charge pump.

GP0[7]

DVDD

DSIS: N/A

When the USB0 PHY is powered down, this pin should

be left unconnected.

USB1

–

USB1 bidirectional data differential signal pair

USB1_DP

AG13

A I/O

–

VDDA_USB_3P3

[plus/minus].

–

When the USB1 PHY is powered down, these pins

USB1_DM

AH13

A I/O

–

VDDA_USB_3P3

should be left unconnected.

USB1 OTG identification input.

–

USB1_ID

AH12

A I

–

When the USB1 PHY is powered down, this pin should

VDDA_USB_3P3

be left unconnected.

USB1 charger enable.

–

USB1_CE

AH14

A O

–

When the USB1 PHY is powered down, this pin should

VDDA_USB_3P3

be left unconnected.

5-V USB1 VBUS comparator input.

This analog input pin senses the level of the USB VBUS

–

USB1_VBUSIN

AG14

A I

–

voltage and should connect directly to the USB VBUS

VDDA_USB_3P3

voltage. When the USB1 PHY is powered down, this pin

should be left unconnected.

When this pin is used as USB1_DRVVBUS and the

AUD_CLKIN0/

USB1 Controller is operating as a Host, this signal is

AUD_CLKIN0,

MCA[0]_AXR[7]/

used by the USB1 Controller to enable the external

IPD

MCA[0], MCA[3],

MCA[0]_AHCLKX/

VBUS charge pump.

DVDD

PINCNTL14

MCA[3]_AHCLKX/

DSIS: N/A

When the USB1 PHY is powered down, this pin should

USB1_DRVVBUS

be left unconnected.

(1)

I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground, A = Analog signal, MM = Multi Muxed, DSIS = De-

selected Input State

(2)

IPD = Internal Pulldown Active, IPU = Internal Pullup Active, DIS = Internal Pull Disabled. This represents the default state of the

Internal Pull after Reset. For more detailed information on pullup/pulldown resistors and situations where external pullup/pulldown

resistors are required, see Section 4.5.1, Pullup/Pulldown Resistors and Section 7.3.17, Pin Behaviors at Reset.

(3)

Specifies the operating I/O supply voltage for each signal

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