TMS320DM355 datasheet(29/153 Pages) TI

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2.4.7

Universal Serial Bus (USB) Interface

TMS320DM355

Digital Media System-on-Chip (DMSoC)

SPRS463 – SEPTEMBER 2007

Table 2-12. MMC/SD Terminal Functions (continued)

TERMINAL

TYPE(1)

OTHER(2)(3)

DESCRIPTION

NAME

NO.

MMCSD1_

DATA3/

MMCSD1: DATA3

GIO022/

B16

I/O/Z

VDD

GIO: GIO[022]

UART2_R

UART2: RTS

The Universal Serial Bus (USB) interface supports the USB2.0 High-Speed protocol and includes dual-role

Host/Slave support. However, no charge pump is included.

NOTE

OTG supplies are not supported. Please ignore all references to OTG in this document.

Table 2-13. USB Terminal Functions

TERMINAL

TYPE(1)

OTHER(2)(3)

DESCRIPTION

NAME

NO.

USB D+ (differential signal pair).

USB_DP

A I/O/Z

VDDA33_USB

When USB is not used, this signal should be connected to VSS_USB.

USB D- (differential signal pair).

USB_DM

A I/O/Z

VDDA33_USB

When USB is not used, this signal should be connected to VSS_USB.

USB reference current output

Connect to VSS_USB_REF via 10K ohm , 1% resistor placed as close to the

USB_R1

A I/O/Z

device as possible.

When USB is not used, this signal should be connected to VSS_USB.

USB operating mode identification pin

For Device mode operation only, pull up this pin to VDD with a 1.5K ohm resistor.

For Host mode operation only, pull down this pin to ground (VSS) with a 1.5K

USB_ID

A I/O/Z

VDDA33_USB

ohm resistor.

If using an OTG or mini-USB connector, this pin will be set properly via the

cable/connector configuration.

When USB is not used, this signal should be connected to VSS_USB.

For host or device mode operation, tie the VBUS/USB power signal to the USB

connector.

USB_VBUS

A I/O/Z

VDD

When used in OTG mode operation, tie VBUS to the external charge pump and

to the VBUS signal on the USB connector.

When the USB is not used, tie VBUS to Vss_USB.

Digital output to control external 5 V supply

USB_DRVVBUS

O/Z

VDD

When USB is not used, this signal should be left as a No Connect.

USB Ground Reference

VSS_USB_REF

GND

VDD

Connect directly to ground and to USB_R1 via 10K ohm, 1% resistor placed as

close to the device as possible

Analog 3.3 V power USBPHY

VDDA3P3_USB

PWR

VDD

When USB is not used, this signal should be connected to VSS_USB.

Common mode 3.3 V power for USB PHY

VDDACM3P3_USB

PWR

VDD

When USB is not used, this signal should be connected to VSS_USB.

Analog 1.2 V power for USB PHY

VDDA1P2_USB

PWR

VDD

When USB is not used, this signal should be connected to VSS_USB.

Digital 1.2 V power for USB PHY

VDDD1P2_USB

PWR

VDD

When USB is not used, this signal should be connected to VSS_USB.

(1)

I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground, A = Analog signal.

(2)

Specifies the operating I/O supply voltage for each signal. See Section 5.3 , Power Supplies for more detail.

(3)

PD = pull-down, PU = pull-up. (To pull up a signal to the opposite supply rail, a 1 k

Ω resistor should be used.)

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