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ATmega16A датащи(PDF) 36 Page - ATMEL Corporation |
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ATmega16A датащи(HTML) 36 Page - ATMEL Corporation |
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36 / 352 page ![]() 36 8154B–AVR–07/09 ATmega16A 9.10 Register Description 9.10.1 MCUCR – MCU Control Register The MCU Control Register contains control bits for power management. • Bits 7, 5, 4 – SM2:0: Sleep Mode Select Bits 2, 1, and 0 These bits select between the six available sleep modes as shown in Table 9-2. Note: 1. Standby mode and Extended Standby mode are only available with external crystals or resonators. • Bit 6 – SE: Sleep Enable The SE bit must be written to logic one to make the MCU enter the sleep mode when the SLEEP instruction is executed. To avoid the MCU entering the sleep mode unless it is the programmers purpose, it is recommended to write the Sleep Enable (SE) bit to one just before the execution of the SLEEP instruction and to clear it immediately after waking up. Bit 765 432 10 SM2 SE SM1 SM0 ISC11 ISC10 ISC01 ISC00 MCUCR 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 Table 9-2. Sleep Mode Select SM2 SM1 SM0 Sleep Mode 000 Idle 0 0 1 ADC Noise Reduction 010 Power-down 011 Power-save 100 Reserved 101 Reserved 110 Standby(1) 1 1 1 Extended Standby(1) |
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