USB3320 datasheet(31/70 Pages) MICROCHIP

31 / 70 page

 2014-2015 Microchip Technology Inc.

DS00001792B-page 31

USB3320

5.7

USB UART Support

The USB3320 provides support for the USB UART interface as detailed in the ULPI specification and the former CEA-

936A specification. The USB3320 can be placed in UART Mode using the method described in Section 6.5, and the

regulator output will automatically switch to the value configured by the UART RegOutput bits in the USB IO & Power

Management register. While in UART mode, the Linestate signals cannot be monitored on the DATA[0] and DATA[1]

pins.

5.8

USB Charger Detection Support

To support the detection and identification of different types of USB chargers the USB3320 provides integrated pull-up

resistors, RCD, on both DP and DM. These pull-up resistors along with the single ended receivers can be used to help

determine the type of USB charger attached. Reference information on implementing charger detection is provided in

Microchip Application Note AN 19.7 - Battery Charging Using Microchip USB Transceivers.

5.9

USB Audio Support

The USB3320 provides two low resistance analog switches that allow analog audio to be multiplexed over the DP and

DM terminals of the USB connector. The audio switches are shown in Figure 5.1. The electrical characteristics of the

USB Audio Switches are provided in Table 4-8.

FIGURE 5-12:

USB3320 DRIVES CONTROL SIGNAL (CPEN) TO EXTERNAL VBUS SWITCH

TABLE 5-8:

USB WEAK PULL-UP ENABLE

RESETB

DP Pullup Enable

DM Pullup Enable

ChargerPullupEnableDP

ChargerPullupEnableDM

Note:

ChargerPullupEnableDP

and ChargerPullupEnableDM are enabled in the USB IO & Power Management

Note:

The USB3320 supports “USB Digital Audio” through the USB protocol in ULPI and USB Serial modes

described in Section 6.0.

VBUS

Switch

OUT

USB Transceiver

VBUS

USB

Connector

VBUS

RVBUS

CPEN

Link

Controller

CPEN Logic

DrvVbusExternal

DrvVbus

ULPI

+5V

VBUS

Supply

USB3320 데이터시트(PDF) 31 Page - Microchip Technology

USB3320 데이터시트(HTML) 31 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70

데이터시트 다운로드

링크 URL