ATMEGA32 16PI PDF

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Definitions The following definitions are used extensively throughout the document: If an interrupt occurs during execution of a multi-cycle instruction, this instruction is completed before the interrupt is served.

ATMEGAPI Datasheet(PDF) – ATMEL Corporation

Clear TCNT1 set all bits to zero. There are two cases that give a transition without Compare Match: As inputs, Port D pins that are externally pulled low will source current if the pull-up resistors are activated. Bit 6 — INT0: There are basically two types of interrupts. The vector is normally a jump to the interrupt routine, and this jump takes three clock cycles. The foregoing information relates to product sold on, or after, the date shown below.

Reset pulses longer than the minimum pulse width see Table 15 will generate a reset, even if the clock is not running. The Indirect with Displacement mode reaches 63 address locations from the base address given by the Y- or Z-register. You have chosen to save the following item to a parts list:. The main function of the CPU core is to ensure correct program execution. Standby mode and Extended Standby mode are only available with external crystals or resonators.

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This will reduce power consumption in Idle mode. The following control bits have changed name, but have armega32 functionality and register location: Table 32 and Table 33 relate the alternate functions of Port D to the overriding signals shown in Figure 26 on page Bit 3 — WDE: This increase comes in addition to the start-up time from the selected sleep mode. If the Global Interrupt Enable Register is cleared, none of the interrupts are enabled independent of atmsga32 individual interrupt enable settings.

ATMEGA32-16PI

To disable an enabled Watchdog Timer, the follow- ing procedure must be followed: The port override function is independent of the Waveform Generation mode. If PORTxn is written logic one when the pin is configured as an input pin, the pull-up resistor is activated. The special atmegs32 are described in the sections where they are of importance.

Figure 43 shows a block diagram of the output compare unit. As inputs, Port C pins that are externally pulled low will source current if the pull-up resistors qtmega32 activated. When entering a sleep mode, all port pins should be configured to use minimum power.

Output from the inverting Oscillator amplifier. Using the output compare to generate waveforms in Normal mode is not recommended, since this will occupy too much of the CPU time. We, the Manufacturer or our representatives may use your personal information to contact you to offer support for your design activity and for other related purposes.

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For a bit read, the low byte must be read before the high byte. The examples also assume that no Flash Boot Atmeega32 is present in the soft- ware. The falling edge of INT1 generates an interrupt request. The pin atmeega32 is strong enough to drive LED displays directly. Number of Ethernet Channels.

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The clock systems are detailed Figure For compare output actions in the non-PWM modes refer to Table 39 on page During interrupts and subroutine calls, the return address Program Counter PC is stored on the Stack.

The time-stamps can then be used to calculate frequency, duty-cycle, and other features of the signal applied. If selected, it will operate with no external components. The Compare Output mode bits do not affect the counting sequence, while the Waveform Generation mode bits do.

The Flash clock controls operation of the Flash interface. All of the clocks need not be active at a given time. The Port C output buffers have symmetrical drive characteristics with both high sink and source capability. This pin is used for navigating through the TAP-controller state machine.

This guarantees that a Brown-out Reset will occur before VCC drops to a voltage where correct operation of the microcontroller is no longer guaranteed. OCF0 is cleared by hardware when executing the corresponding interrupt handling vector. These code examples assume that the part specific header file is included before compilation.

The port pins are tri-stated when a reset condition becomes active, even if no clocks are running. The TOV0 Flag in this case behaves like a ninth bit, except that it is only set, not cleared.