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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) 130 Page - ATMEL Corporation |
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ATmega16 датащи(HTML) 130 Page - ATMEL Corporation |
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130 / 357 page  130 2466S–AVR–05/09 ATmega16(L) • Bit 2:0 – CS22:0: Clock Select The three Clock Select bits select the clock source to be used by the Timer/Counter, see Table 54. Timer/Counter Register – TCNT2 The Timer/Counter Register gives direct access, both for read and write operations, to the Timer/Counter unit 8-bit counter. Writing to the TCNT2 Register blocks (removes) the compare match on the following timer clock. Modifying the counter (TCNT2) while the counter is running, introduces a risk of missing a compare match between TCNT2 and the OCR2 Register. Output Compare Register – OCR2 The Output Compare Register contains an 8-bit value that is continuously compared with the counter value (TCNT2). A match can be used to generate an output compare interrupt, or to generate a waveform output on the OC2 pin. Table 54. Clock Select Bit Description CS22 CS21 CS20 Description 0 0 0 No clock source (Timer/Counter stopped). 00 1 clk T2S/(No prescaling) 01 0 clk T2S/8 (From prescaler) 01 1 clk T2S/32 (From prescaler) 10 0 clk T2S/64 (From prescaler) 10 1 clk T2S/128 (From prescaler) 11 0 clk T 2S/256 (From prescaler) 11 1 clkT2S/1024 (From prescaler) Bit 765 4321 0 TCNT2[7:0] TCNT2 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 000 0000 0 Bit 765 4321 0 OCR2[7:0] OCR2 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 000 0000 0 |
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