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AS8218 数据表(PDF) 5 Page - ams AG |
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AS8218 数据表(HTML) 5 Page - ams AG |
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5 / 123 page  Data Sheet AS8218 / AS8228 Revision 3.0, 31-May-06 Page 5 of 123 Pin No. Pin Name AS8218 Pin Name AS8228 Type Description 10 IO1 IO1 DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down resistors and selectable drive strength. 11 IO2 IO2 DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down resistors and selectable drive strength. 12 IO3 IO3 DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down resistors and selectable drive strength. 13 VDDD VDDD S Positive digital supply. VDDD provides the positive supply voltage to the digital circuitry and is internally connected to pin 22. The required supply voltage is 3.3V ±10%. 14 VSSD VSSD S Negative digital supply. VSSD is the ground reference for the digital circuitry. 15 IO4 IO4 DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down resistors and selectable drive strength. 16 IO5 IO5 DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down resistors and selectable drive strength. 17 IO6 IO6 DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down resistors and selectable drive strength. 18 IO7 IO7 DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down resistors and selectable drive strength. 19 IO8 IO8 DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down resistors and selectable drive strength. 20 SI SI DIPD Serial peripheral interface (SPI) for external EEPROM: Serial data input. SI is a digital input with an on-chip pull-down resistor. 21 VSSD VSSD S Negative digital supply. VSSD is the ground reference for the digital circuitry. 22 VDDD VDDD S Positive digital supply. VDDD provides the positive supply voltage to the digital circuitry and is internally connected to pin 13. The required supply voltage is 3.3V ±10%. 23 S_N S_N DO Serial peripheral interface (SPI) for external EEPROM: Chip select (active low). 24 SO SO DO Serial peripheral interface (SPI) for external EEPROM: Serial data output 25 SC SC DO Serial peripheral interface (SPI) for external EEPROM: Serial clock 26 n.c. IO9 DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down resistors and selectable drive strength. 27 n.c. IO10 DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down resistors and selectable drive strength. 28 n.c. IO11 DIO Programmable multi-purpose input/output, with selectable pull-up or pull-down resistors and selectable drive strength. 29 TXD TXD DO Universal Asynchronous Receiver/Transmitter (UART1) serial transmit data output. 30 RXD RXD DIPU Universal Asynchronous Receiver/Transmitter (UART1) serial receive data input. RXD is a digital input with an on-chip pull-up resistor. 31 VDD_BAT VDD_BAT S Battery backup supply voltage input for the system timing and real time clock (RTC). 32 XIN XIN AI A 3.0 to 4.0MHz crystal may be connected across XIN and XOUT without the requirement for external load capacitors. Alternatively, an external clock signal may be applied to XIN. |
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