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R2023T-E2 Datasheet(PDF) 3 Page - RICOH electronics devices division |
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R2023T-E2 Datasheet(HTML) 3 Page - RICOH electronics devices division |
3 / 50 page R2023K/T 3 PIN DESCRIPTION Symbol Item Description SCL Serial Clock Line The SCL pin is used to input clock pulses synchronizing the input and output of data to and from the SDA pin. Allows a maximum input voltage of 5.5v regardless of supply voltage. SDA Serial Data Line The SDA pin is used to input and output data intended for writing and reading in synchronization with the SCL pin. Allows a maximum input voltage of 5.5v regardless of supply voltage. Nch. open drain output. INTRA Interrupt Output A The INTRA pin is used to output alarm interrupt (Alarm_D) and periodic interrupt signals to the CPU. Disabled at power-on from 0V. N-channel open drain output. Allows a maximum pull-up voltage of 5.5v regardless of supply voltage. INTRB Interrupt Output B The INTRB pin is used to output alarm interrupt (Alarm_W) to the CPU. Disabled at power-on from 0V. N-channel open drain output. Allows a maximum pull-up voltage of 5.5v regardless of supply voltage. 32KOUT 32kHz Clock Output The 32KOUT pin is used to output 32.768-kHz clock pulses. The pin is CMOS push-pull output. The output is disabled and held “L” when CLKC pin is set to “L” or open, or certain register setting. This pin is enabled at power-on from 0v. CLKC Clock Control The CLKC pin is used to control output of the 32KOUT pin. The clock output is disabled and held “L” when this pin is set to “L” or open. Incorporated pull down register. OSCIN OSCOUT Oscillation Circuit Input / Output The OSCIN and OSCOUT pins are used to connect the 32.768-kHz crystal oscillator (with all other oscillation circuit components built into the R2023K/T). VDD VSS Positive/Negative Power Supply Input The VDD pin is connected to the power supply. The VSS pin is grounded. (VSS) Please connect to ground line, or do not connect any lines. |
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