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CS5535-UDC Datasheet(PDF) 38 Page - National Semiconductor (TI) |
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CS5535-UDC Datasheet(HTML) 38 Page - National Semiconductor (TI) |
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38 / 555 page  www.national.com 38 Revision 0.8 Signal Definitions (Continued) 2.2.4 USB Interface Signal Name Ball No. Type Description USB_PWR_EN1 P17 O USB Power Enable 1. This signal is intended to be used to enable an external USB power source for Port 1, such as the National LM3526. USB_PWR_EN1 is an active high signal. If low, it indicates that the external USB power source for Port 1 is turned off. Defaults off from reset. USB_PWR_EN2 N16 O USB Power Enable 2. This signal is intended to be used to enable an external USB power source for Port 2, such as the National LM3526. USB_PWR_EN2 is an active high signal. If low, it indicates that the external USB power source for Port 2 is turned off. Defaults off from reset. USB_OC_SENS# N15 I USB Over Current Sense. This signal is the logical OR or wired-OR from all external USB power supply devices, such as the National LM3526, and is shared by USB1 and USB2 (all four ports). When pulled low it causes both USB_PWR_EN1 and USB_PWR_EN2 to de-assert and generate an interrupt. Tie high if not used. USB1_1_DATPOS K16 I/O USB Port 1_1 Data Positive. This is the positive differential side of the USB data for port 1_1. (Note 1, Note 2.) Note 1. Use external 27 Ω series resistor on output. From reset, these outputs are in TRI-STATE. At board level, a 15 kΩ pull-down resistor is required per the USB specification. Note 2. External clamping diodes may be needed to meet over voltage requirements. USB1_1_DATNEG K17 I/O USB Port 1_1 Data Negative. This is the negative differential side of the USB data for port 1_1. (Note 1, Note 2.) USB1_2_DATPOS L16 I/O USB Port 1_2 Data Positive. This is the positive differential side of the USB data for port 1_2. (Note 1, Note 2.) USB1_2_DATNEG L17 I/O USB Port 1_2 Data Negative. This is the negative differential side of the USB data for port 1_2. (Note 1, Note 2.) USB2_1_DATPOS H17 I/O USB Port 2_1 Data Positive. This is the positive differential side of the USB data for port 2_1. (Note 1, Note 2.) USB2_1_DATNEG H16 I/O USB Port 2_1 Data Negative. This is the negative differential side of the USB data for port 2_1. (Note 1, Note 2.) USB2_2_DATPOS G17 I/O USB Port 2_2 Data Positive. This is the positive differential side of the USB data for port 2_2. (Note 1, Note 2.) USB2_2_DATNEG G16 I/O USB Port 2_2 Data Negative. This is the negative differential side of the USB data for port 2_2. (Note 1, Note 2.) AVSS_USB F16, J16, M16 AGND USB Analog Circuit Ground. Total of three ground balls for the USB transceivers. Most applications should connect this to signal ground. AVDD_USB F17, J17, M17 APWR USB Analog Circuit Power. Total of three power balls for the USB transceivers. Most applications should connect this to VIO. |
Similar Part No. - CS5535-UDC |
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Similar Description - CS5535-UDC |
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