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HT68FU50 数据表(PDF) 182 Page - Holtek Semiconductor Inc |
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HT68FU50 数据表(HTML) 182 Page - Holtek Semiconductor Inc |
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182 / 244 page  UART Module Pin Description Pin Name I/O Description RX I UART RX serial data input pin If UARTEN=1 and RXEN=1, then RX is the UART serial data input If UARTEN=0 or RXEN=0, then RX is high impedance TX O UART TX serial data output pin If UARTEN=1 and TXEN=1, then TX is the UART serial data output If UARTEN=0 or TXEN=0, then TX is high impedance SDI I Slave SPI Serial Data In Input Signal Internally connected to the MCU Master SPI SDO output signal SDO O Slave SPI Serial Data Out Output Signal Internally connected to the MCU Master SPI SDI input signal SCK I Slave SPI Serial Clock Input Signal Internally connected to the MCU Master SPI SCK output signal SCS I Slave SPI Device Select Input Signal Internally connected to the MCU Master SPI SCS output signal - connected to pull high resistor CLKI I Clock Input Signal Internally connected to the MCU Master PCK output signal INT O UART Interrupt Output Signal Internally connected to the MCU Master PINT input signal A UART related interrupt will generate a low pulse signal on this line NC ¾ Implies that the pin is ²Not Connected² and can therefore not be used. Notes: The pin description for all pins with the exception of the UART TX and RX pins are described in the preceding MCU section. UART Module D.C. Characteristics Ta=25 °C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions IDD1 Operating Current * (SPI Enabled, UART disabled) 3.0V fCLKI=12MHz, SCK=fCLKI/4, Output no load ¾¾ 1.0 mA 5.0V fCLKI=16MHz, SCK=fCLKI/4, Output no load ¾¾ 2.0 mA IDD2 Operating Current * (SPI enabled, UART enabled) 2.2V fCLKI=6MHz, SCK=fCLKI/4, Output no load ¾¾ 4.2 mA 5.0V fCLKI=12MHz, SCK=fCLKI/4, Output no load ¾¾ 4.8 mA ISTB Standby Current * (SPI disabled, UART disabled) 5.0V fCLKI=16MHz, SCK=fCLKI/4, SCS=VDD, UARTEN=0, TXEN=1, RXEN=1, SDI=H, RX=H, Output no load ¾¾ 0.6 mA VIL Input Low Voltage for RX Ports ¾¾ 0 ¾ 0.3VDD V VIH Input High Voltage for RX Ports ¾¾ 0.7VDD ¾ VDD V IOL TX Port Sink Current 3.0V VO=0.1VDD 2.5 5.0 ¾ mA 5.0V 10.0 25.0 ¾ mA IOH RX Port Source Current 3.0V VO=0.9VDD -1.5 -3.0 ¾ mA 5.0V -5.0 -8.0 ¾ mA HT68F20/HT68F30/HT68F40/HT68F50/HT68F60 HT68FU30/HT68FU40/HT68FU50/HT68FU60 Rev. 1.50 182 March 15, 2011 |
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