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SH7721 Datasheet(PDF) 623 Page - Renesas Technology Corp |
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SH7721 Datasheet(HTML) 623 Page - Renesas Technology Corp |
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623 / 1524 page  Section 17 Realtime Clock (RTC) Rev. 3.00 Jan. 18, 2008 Page 561 of 1458 REJ09B0033-0300 17.2 Input/Output Pin Table 17.1 shows the RTC pin configuration. Table 17.1 Pin Configuration Name Abbreviation I/O Description RTC external clock EXTAL_RTC Input Connects crystal resonator for RTC. Also used to input external clock for RTC. RTC crystal XTAL_RTC Output Connects crystal resonator for RTC. RTC power supply V CC_RTC Power-supply pin for RTC (1.5 V)* RTC GND V SS_RTC GND pin for RTC* RTC power supply V CCQ_RTC — Power-supply pin for RTC (3.3 V)* Note: * Power-supply pins for RTC should be power supplied even when the RTC is not used. |
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