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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT43USB326 датащи(PDF) 38 Page - ATMEL Corporation |
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AT43USB326 датащи(HTML) 38 Page - ATMEL Corporation |
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38 / 102 page  38 AT43USB326 3313D–USB–04/06 Timer/Counter0 Control Register – TCCR0 • Bits 7..3 – Res: Reserved Bits These bits are reserved bits in the AT43USB355 and always read as zero. • Bits 2, 1, 0 – CS02, CS01, CS00: Clock Select0, bit 2, 1 and 0 The Clock Select0 bits 2, 1 and 0 define the prescaling source of Timer/Counter0. The Stop condition provides a Timer Enable/Disable function. The CK down divided modes are scaled directly from the CK oscillator clock. If the external pin modes are used for Timer/Counter0, transitions on PB0/(T0) will clock the counter even if the pin is configured as an output. This feature can give the user SW control of the counting. Timer/Counter0 – TCNT0 The Timer/Counter0 is realized as an up-counter with read and write access. If the Timer/Counter0 is written and a clock source is present, the Timer/Counter0 continues count- ing in the clock cycle following the write operation. Bit 7 6 543 2 1 0 $33 ($53) – – – – – CS02 CS01 CS00 TCCR0 Read/Write R R R R R R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 Table 10. Clock 0 Prescale Select CS02 CS01 CS00 Description 0 0 0 Stop, the Timer/Counter0 is stopped 001 CK 010 CK/8 011 CK/64 100 CK/256 101 CK/1024 1 1 0 External Pin T0, falling edge 1 1 1 External Pin T0, rising edge Bit 7 6 5 4 3 2 1 0 $32 ($52) MSB – – – – – – LSB TCNT0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 |
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