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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AT90LS8535-4AI 데이터시트(PDF) 85 Page - ATMEL Corporation |
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AT90LS8535-4AI 데이터시트(HTML) 85 Page - ATMEL Corporation |
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85 / 127 page  85 AT90S/LS8535 1041H–11/01 Alternate Functions of Port C When the AS2 bit in ASSR is set (one) to enable asynchronous clocking of Timer/Counter2, pins PC6 and PC7 are disconnected from the port. In this mode, a crystal oscillator is connected to the pins and the pins cannot be used as I/O pins. Port C Schematics Note that all port pins are synchronized. The synchronization latch is, however, not shown in the figure. Figure 58. Port C Schematic Diagram (Pins PC0 - PC5) Figure 59. Port C Schematic Diagram (Pins PC6) D D Q Q RESET RESET C C WD WP RD MOS PULL- UP PCn R R WP: WD: RL: RP: RD: n: WRITE PORTC WRITE DDRC READ PORTC LATCH READ PORTC PIN READ DDRC 0-5 DDCn PORTCn RL RP D D Q Q RESET RESET C C WD WP RD MOS PULL- UP PC6 R R WP: WD: RL: RP: RD: AS2: WRITE PORTC WRITE DDRC READ PORTC LATCH READ PORTC PIN READ DDRC ASYNCH SELECT T/C2 DDC6 PORTC6 RL RP AS2 T/C2 OSC AMP INPUT |
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