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PT7C43190WEX Datasheet(PDF) 2 Page - Pericom Semiconductor Corporation |
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PT7C43190WEX Datasheet(HTML) 2 Page - Pericom Semiconductor Corporation |
2 / 32 page |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 2015-09-0015 PT0274-7 10/16/15 2 Pin Description Pin No. Pin Name Type Description 1 INT O Output for Interrupt Signal. This pin outputs a signal of interrupt, or a clock pulse. By using the status register 2, users can select either of: alarm 1 interrupt, alarm 2 interrupt, output of user-set frequency, per-minute edge interrupt, minute-periodical interrupt 1, minute-periodical interrupt 2, or 32.768 kHz output. This pin has NCH open drain output. 2 XOUT O Oscillator Circuit Output. Together with X1, 32.768kHz crystal is connected between them. When 32.768kHz external input, X2 must be float. 3 XIN I Oscillator Circuit Input. Together with X1, 32.768kHz crystal is connected between them. Or external clock input. 4 VSS P Negative power supply pin. Connects to GND. 5 CS I Chip select input pin. This pin is to input chip select, has a pull-down resistor. Communication is available when this pin is in "H". If not using communication, set this pin "L" or open. 6 SCK I Serial clock input pin. This pin is to input a clock pulse for serial interface. When the CS pin is in "H", the SIO pin inputs / outputs data by synchronizing with the clock pulse. When the CS pin is in "L" or open, the SCK pin does not accept inputting a clock pulse. 7 SIO I/O Serial Data I/O pin. This pin is a data input / output pin of serial interface. When the CS pin is in "H", the SIO pin inputs / outputs data by synchronizing with a clock pulse from the SCK pin. The status is in "High-Z" when the CS pin is in "L" or open, so that the chip does not transmit data. Setting the CS pin to "H" from "L" or open, this SIO pin goes in the input status so that it receives the command data. This pin has CMOS input and NCH open drain output. 8 VDD P Positive power supply pin. Connect this VDD pin with a positive power supply. Block Diagram Second Oscillator Divider, Timing generator INT register 1 INT controller 1 Clock correction register Status register 1 Status register 2 Free register Low power supply voltage detector Power-on detection circuit Constant-voltage circuit Comparator 1 Minute Hour Day of Week Day Month Year Comparator 2 Real-time data register INT register 2 INT controller 2 INT register 2 Serial interface SIO SCK CS INT VSS VDD XOUT XIN PT7C43190 |
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