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R5F21246SNXXXLG Datasheet(PDF) 11 Page - Renesas Technology Corp |
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R5F21246SNXXXLG Datasheet(HTML) 11 Page - Renesas Technology Corp |
11 / 59 page R8C/24 Group, R8C/25 Group 1. Overview Rev.3.00 Feb 29, 2008 Page 11 of 51 REJ03B0117-0300 1.6 Pin Functions Table 1.5 lists Pin Functions. I: Input O: Output I/O: Input and output Table 1.5 Pin Functions Type Symbol I/O Type Description Power supply input VCC, VSS I Apply 2.2 V to 5.5 V to the VCC pin. Apply 0 V to the VSS pin. Analog power supply input AVCC, AVSS I Power supply for the A/D converter. Connect a capacitor between AVCC and AVSS. Reset input RESET I Input “L” on this pin resets the MCU. MODE MODE I Connect this pin to VCC via a resistor. XIN clock input XIN I These pins are provided for XIN clock generation circuit I/O. Connect a ceramic resonator or a crystal oscillator between the XIN and XOUT pins. To use an external clock, input it to the XIN pin and leave the XOUT pin open. XIN clock output XOUT O XCIN clock input XCIN I These pins are provided for XCIN clock generation circuit I/O. Connect a crystal oscillator between the XCIN and XCOUT pins. To use an external clock, input it to the XCIN pin and leave the XCOUT pin open. XCIN clock output XCOUT O INT interrupt input INT0 to INT3 I INT interrupt input pins. INT0 is timer RD input pin. INT1 is timer RA input pin. Key input interrupt KI0 to KI3 I Key input interrupt input pins Timer RA TRAIO I/O Timer RA I/O pin TRAO O Timer RA output pin Timer RB TRBO O Timer RB output pin Timer RD TRDIOA0, TRDIOA1, TRDIOB0, TRDIOB1, TRDIOC0, TRDIOC1, TRDIOD0, TRDIOD1 I/O Timer RD I/O ports TRDCLK I External clock input pin Timer RE TREO O Divided clock output pin Serial interface CLK0, CLK1 I/O Transfer clock I/O pin RXD0, RXD1 I Serial data input pins TXD0, TXD1 O Serial data output pins I2C bus interface SCL I/O Clock I/O pin SDA I/O Data I/O pin Clock synchronous serial I/O with chip select SSI I/O Data I/O pin SCS I/O Chip-select signal I/O pin SSCK I/O Clock I/O pin SSO I/O Data I/O pin Reference voltage input VREF I Reference voltage input pin to A/D converter A/D converter AN0 to AN11 I Analog input pins to A/D converter I/O port P0_0 to P0_7, P1_0 to P1_7, P2_0 to P2_7, P3_0, P3_1, P3_3 to P3_5, P3_7, P4_3 to P4_5, P6_0 to P6_7 I/O CMOS I/O ports. Each port has an I/O select direction register, allowing each pin in the port to be directed for input or output individually. Any port set to input can be set to use a pull-up resistor or not by a program. P2_0 to P2_7 also function as LED drive ports. Input port P4_2, P4_6, P4_7 I Input-only ports |
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