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ATtiny13A-SSH bảng dữ liệu(PDF) 94 Page - ATMEL Corporation |
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ATtiny13A-SSH bảng dữ liệu(HTML) 94 Page - ATMEL Corporation |
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94 / 174 page ![]() 94 8126D–AVR–11/09 ATtiny13A • Bit 3 – ADIE: ADC Interrupt Enable When this bit is written to one and the I-bit in SREG is set, the ADC Conversion Complete Inter- rupt is activated. • Bits 2:0 – ADPS2:0: ADC Prescaler Select Bits These bits determine the division factor between the system clock frequency and the input clock to the ADC. 14.12.3 ADCL and ADCH – The ADC Data Register 14.12.3.1 ADLAR = 0 14.12.3.2 ADLAR = 1 When an ADC conversion is complete, the result is found in these two registers. When ADCL is read, the ADC Data Register is not updated until ADCH is read. Consequently, if the result is left adjusted and no more than 8-bit precision is required, it is sufficient to read ADCH. Otherwise, ADCL must be read first, then ADCH. Table 14-4. ADC Prescaler Selections ADPS2 ADPS1 ADPS0 Division Factor 000 2 001 2 010 4 011 8 100 16 101 32 110 64 111 128 Bit 151413121110 9 8 0x05 –––––– ADC9 ADC8 ADCH 0x04 ADC7 ADC6 ADC5 ADC4 ADC3 ADC2 ADC1 ADC0 ADCL 76543210 Read/Write RRRRRRRR RRRRRRRR Initial Value 00000000 00000000 Bit 151413121110 9 8 0x05 ADC9 ADC8 ADC7 ADC6 ADC5 ADC4 ADC3 ADC2 ADCH 0x04 ADC1 ADC0 –––––– ADCL 76543210 Read/Write RRRRRRRR RRRRRRRR Initial Value 00000000 00000000 |
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