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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATMEGA16 датащи(PDF) 233 Page - ATMEL Corporation |
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ATMEGA16 датащи(HTML) 233 Page - ATMEL Corporation |
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233 / 315 page  233 ATmega16(L) 2466E–AVR–10/02 Note: Incorrect setting of the switches in Figure 123 will make signal contention and may damage the part. There are several input choices to the S&H circuitry on the negative input of the output comparator in Figure 123. Make sure only one path is selected from either one ADC pin, Bandgap reference source, or Ground. MUXEN_4 Input Input Mux bit 4 0 0 MUXEN_3 Input Input Mux bit 3 0 0 MUXEN_2 Input Input Mux bit 2 0 0 MUXEN_1 Input Input Mux bit 1 0 0 MUXEN_0 Input Input Mux bit 0 1 1 NEGSEL_2 Input Input Mux for negative input for differential signal, bit 2 00 NEGSEL_1 Input Input Mux for negative input for differential signal, bit 1 00 NEGSEL_0 Input Input Mux for negative input for differential signal, bit 0 00 PASSEN Input Enable pass-gate of gain stages. 1 1 PRECH Input Precharge output latch of comparator. (Active low) 11 SCTEST Input Switch-cap TEST enable. Output from x10 gain stage send out to Port Pin having ADC_4 00 ST Input Output of gain stages will settle faster if this signal is high first two ACLK periods after AMPEN goes high. 00 VCCREN Input Selects Vcc as the ACC reference voltage. 00 Table 91. Boundary-scan Signals for the ADC (Continued) Signal Name Direction as Seen from the ADC Description Recommended Input when Not in Use Output Values when Recommended Inputs are used, and CPU is not Using the ADC |
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