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FT232R Scheda tecnica(PDF) 9 Page - Future Technology Devices International Ltd. |
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FT232R Scheda tecnica(HTML) 9 Page - Future Technology Devices International Ltd. |
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9 / 43 page  Copyright © 2010 Future Technology Devices International Limited 9 Document No.: FT_000053 FT232R USB UART IC Datasheet Version 2.07 Clearance No.: FTDI# 38 Pin No. Name Type Description 14 CBUS3 I/O Configurable CBUS I/O Pin. Function of this pin is configured in the device internal EEPROM. Factory default configuration is PWREN#. See CBUS Signal Options, Table 3.9. PWREN# should be used with a 10kΩ resistor pull up. 22 CBUS1 I/O Configurable CBUS I/O Pin. Function of this pin is configured in the device internal EEPROM. Factory default configuration is RXLED#. See CBUS Signal Options, Table 3.9. 23 CBUS0 I/O Configurable CBUS I/O Pin. Function of this pin is configured in the device internal EEPROM. Factory default configuration is TXLED#. See CBUS Signal Options, Table 3.9. Table 3.4 UART Interface and CUSB Group (see note 3) Notes: 1. The minimum operating voltage VCC must be +4.0V (could use VBUS=+5V) when using the internal clock generator. Operation at +3.3V is possible using an external crystal oscillator. 2. For details on how to use an external crystal, ceramic resonator, or oscillator with the FT232R, please refer Section 7.6 3. When used in Input Mode, the input pins are pulled to VCCIO via internal 200kΩ resistors. These pins can be programmed to gently pull low during USB suspend (PWREN# = “1”) by setting an option in the internal EEPROM. |
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