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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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USB3370 датащи(PDF) 5 Page - Microchip Technology |
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USB3370 датащи(HTML) 5 Page - Microchip Technology |
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5 / 75 page  2012 - 2015 Microchip Technology Inc. DS00001915B-page 5 USB3370 The USB3370 includes an integrated 3.3V LDO regulator that is used to generate 3.3V from power applied to the VBAT pin. The voltage on the VBAT pin can range from 3.0 to 5.5V. The regulator dropout voltage is less than 100mV which allows the PHY to continue USB signaling when the voltage on VBAT drops to 3.0V. The USB transceiver will continue to operate at lower voltages, although some parameters may be outside the limits of the USB specifications. The VBAT and VDD33 pins should never be connected together. In USB UART mode, the USB3370 DP and DM pins are redefined to enable pass-through of asynchronous serial data. The USB3370 will enter UART mode when programmed, as described in Section 6.7.1. 1.1 Reference Documents UTMI+ Low Pin Interface (ULPI) Specification, Rev. 1.1 Universal Serial Bus Specification, Revision 2.0 On-The-Go Supplement to the USB2.0 Specification, Rev. 1.3 On-The-Go Supplement to the USB2.0 Specification, Rev. 2.0 USB Battery Charging Specification, Rev. 1.1 FIGURE 1-1: BLOCK DIAGRAM USB3370 OTG Hi-Speed USB Transceiver ULPI Interface ULPI Registers and State Machine BIAS Low Jitter Integrated PLL Integrated Power Management VBUS ID DP DM RBIAS DATA[7:0] RESETB VDD18 VDD33 VBAT DIR NXT STP CLKOUT OVP VDDIO CPEN_N BC 1.1 EXTVBUS |
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