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ATMEGA32 16PI PDF

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ATMEGA32-16PI Datasheet

The Port C pins are tri-stated when a reset condition becomes active, even if the clock is not running. Any logical change on INT1 generates an interrupt at,ega32.

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 wak- ing up. A change of the COM When the low byte is read the high byte is copied into the high byte temporary register TEMP. The various choices for each clocking option is given in the following sections. In the other sleep modes, the Analog Comparator is automatically disabled.

When this Oscillator is selected, start-up times are determined by the SUT fuses as shown in Table 6. The flag is cleared when the interrupt routine is executed.

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A self-timing function, however, lets the user software detect when the next byte can be written. Configuring the Pin Each port pin consists of three register bits: Most port pins are multiplexed with alternate functions for the peripheral fea- tures on the device. The counter is then cleared at the following timer clock cycle.

Configure the port pin as input with the internal pull-up switched off to avoid the digital port function from interfering with the function of the analog comparator.

Writing a zero to this bit will have no effect. Alternatively, the flag can be cleared by writing a logical one to it. This reduces power consumption considerably. The product detailed below complies with the specifications published by RS Components.

All interrupts are assigned individual enable bits which must be written logic one together with the Global Interrupt Enable bit in the Status Register in order 166pi enable the interrupt. When entering a sleep mode, all port pins should be configured to use minimum power. Bit 4 — JTRF: The figures include information on when Interrupt Atmega2 are set. The detection level is defined in Table The OC0 Register keeps its value even when changing between waveform generation modes.

Stack Pointer The Stack is mainly used for storing temporary data, for storing local variables and for storing return addresses after interrupts and subroutine calls. This documentation contains simple code examples that briefly show how to use various parts of the device. This feature provides a way of generating a software interrupt. Two Independent Output Compare Units? When no clock source is selected CS Halting the CPU clock inhibits the core from performing general operations and calculations.

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ATMEGAPI Manu:AIMEL Package:DIP,8-bit AVR Microcontroller

Bit 0 — PORF: Bit 7 — INTF1: The I-bit in the Status Register is unaffected by the automatic disabling. If PORTxn is written logic one when the pin is configured as an input pin, the pull-up resistor is ahmega32. Table 41 shows the COM C should be at least 22 pF.

Note that the TDI pin for the next device in the scan chain contains a pull-up that avoids this problem. The ATmega32 provides the following features: As inputs, Port D pins that are externally pulled low will source current if the pull-up resistors are activated.

This must be handled by software. Shorter pulses are not guaranteed to generate a reset. Some of the Status Flags are cleared by writing a logical one to them.

If the Flash is never being updated by the CPU, step 2 can be omitted. Bit 1 — OCIE0: Signalize that TCNT1 has reached minimum value zero.