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ATmega325P Datasheet(PDF) 233 Page - ATMEL Corporation |
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ATmega325P Datasheet(HTML) 233 Page - ATMEL Corporation |
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233 / 364 page  233 8023F–AVR–07/09 ATmega325P/3250P Control corresponds to the Data Direction – DD Register, and the Pull-up Enable – PUExn – cor- responds to logic expression PUD · DDxn · PORTxn. Digital alternate port functions are connected outside the dotted box in Figure 23-3 to make the scan chain read the actual pin value. For Analog function, there is a direct connection from the external pin to the analog circuit, and a scan chain is inserted on the interface between the digi- tal logic and the analog circuitry. Figure 23-2. Boundary-scan Cell for Bi-directional Port Pin with Pull-up Function. DQ DQ G 0 1 0 1 DQ DQ G 0 1 0 1 0 1 0 1 DQ DQ G 0 1 Vcc EXTEST To Next Cell ShiftDR Output Control (OC) Pullup Enable (PUE) Output Data (OD) Input Data (ID) From Last Cell UpdateDR ClockDR FF2 LD2 FF1 LD1 LD0 FF0 |
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