Texas Instruments TMS320DM355 Universal Serial Bus USB Interface, Audio Interfaces, Nameno

TMS320DM355

Digital Media System-on-Chip (DMSoC)

www.ti.com

SPRS463A –SEPTEMBER 2007 –REVISED SEPTEMBER 2007

2.4.7Universal Serial Bus (USB) Interface

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.

Table 2-13. USB Terminal Functions

TERMINAL

TYPE (1)

NAMENO.

OTHER (2) (3)

DESCRIPTION

USB_DP

USB_DM

USB_R1

USB_ID

USB_VBUS

USB_DRVVBUS

VSS_USB_REF

VDDA33_USB

VDDA33_USB_PLL

VDDA13_USB

VDDD13_USB

A7	A I/O/Z
A6	A I/O/Z
C7	A I/O/Z

D5 A I/O/Z

E5 A I/O/Z

C5 O/Z

C8 GND

J8 PWR

B6 PWR

H7 PWR

C6 PWR

VDDA33_USB

VDDA33_USB

VDDA33_USB

VDD

VDD

VDD

VDD

VDD

VDD

VDD

USB D+ (differential signal pair).

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

USB D- (differential signal pair).

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 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 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.

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

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

USB Ground Reference

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

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

Common mode 3.3 V power for USB PHY (PLL)

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

Analog 1.3 V power for USB PHY

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

Digital 1.3 V power for USB PHY

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

PRODUCT PREVIEW

(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 kΩ resistor should be used.)

2.4.8Audio Interfaces

The DM355 includes two Audio Serial Ports (ASP ports), which are backward compatible with other TI ASP serial ports and provide I2S audio interface. One interface is multiplexed with GIO signals.

Table 2-14. ASP Terminal Functions

TERMINAL		TYPE (1)	OTHER (2) (3)	DESCRIPTION
NAME	NO.
ASP0_CL				ASP0: Receive Clock
KR/	F17	I/O/Z	VDD
				GIO: GIO[026]
GIO026

(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 kΩ resistor should be used.)

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