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Tuning to other values atmega332 not guaranteed, as indicated in Table This mode is identical to Power-down, with one exception: This mode is identical to Power-down with the exception that the Oscillator is kept running. If an interrupt condition occurs while the corresponding interrupt enable bit is cleared, the Interrupt Flag will be set and remembered until the interrupt is enabled, or the flag is cleared by software. Refer to the individual module sections for a full description of the alternate functions.

The FOC0 bit is always read as zero. 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.

ATMEGAPJ Microchip / Atmel | Ciiva

A self-timing function, however, lets the user software detect when the next byte can be written. Two Independent Output Compare Units? The PWM frequency for the output can be calculated by the following equation: Signalize that TCNT1 has reached minimum value zero.

The falling edge of INT0 generates an interrupt request. If these modules are disabled as described in the sections above, the internal voltage reference will be disabled and it will not be consuming power. If an interrupt occurs during execution of a multi-cycle instruction, this instruction is completed before the interrupt is served. The program memory is InSystem Reprogrammable Flash memory. In the other sleep modes, the Analog Comparator is automatically disabled. The pin and port indexes from Figure 26 are not shown in the succeeding tables.


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

This will reduce power consumption in Idle mode. OCF0 is cleared by hardware when executing the corresponding interrupt handling vector.

When reading back a software assigned pin value, a nop instruction must be inserted as indicated in Figure Pulses on INT2 wider than the minimum pulse width given in Table 36 will generate an interrupt. Definitions Atmega2 following definitions are used extensively throughout the document: Otherwise, the Watchdog will not be disabled.

The elements of the block diagram that are not directly a part of the output compare unit are gray shaded. All other 1pi are unique for each pin.

Serial output data from Instruction Register or Data Regis- ter. When entering a sleep mode, all port pins should be configured to use minimum power. Be aware that not all C Compiler vendors include bit definitions in the header files and interrupt handling in C is compiler dependent.

Note that the TDI pin for the next device in the scan chain contains a pull-up that avoids this problem. If the Watchdog Timer is enabled, it will be enabled in all sleep modes, and hence, always consume power. Reserved Bits These bits are reserved bits in the ATmega32 and will always read as zero.

When an interrupt occurs, the Global Interrupt Enable I-bit is cleared and all interrupts are disabled.

Atmel ATMEGA32-16PI, 8bit AVR Microcontroller, 16MHz, 1.024 kB, 32 kB Flash, 40-Pin PDIP

Similarly, if one or more interrupt conditions occur while the Global Interrupt Enable bit is cleared, the corresponding Interrupt Flag s will be set and remembered until the global interrupt enable aymega32 is set, and will then be executed by order of priority.

If the Global Interrupt Enable Register is cleared, none of the interrupts are enabled independent of the individual interrupt enable settings. Serial input data to be shifted in to the Instruction Register or Data Register scan chains.

A match can be used to generate an output compare interrupt, or to generate a waveform output on the OC0 pin. Wtmega32 the Temporary High Byte Register If writing to more than one bit register where the high byte is the same for all registers written, then the high byte only needs to atmega322 written once. The OCR0 Register access may seem complex, atmeya32 this is not case. The crystal should be connected as shown in Figure Block Diagram Figure 2.


In Power-save mode, the Asynchronous Timer continues to run, allowing the atmegx32 to maintain a timer base while the rest of the device is sleeping. The Port C output buffers have symmetrical drive characteristics with both high sink and source capability.

In the figure, the signal is connected to the output of the schmitt trigger but before the synchronizer. The assembly code example requires that the r Assembly Code Example sei ; set global interrupt enable sleep ; enter sleep, waiting for interrupt ; note: In the deeper sleep modes, this will contribute significantly to the total current consumption.

This improves the noise environment for the ADC, enabling higher resolution measurements. This bit will always be read as zero.

In this mode, there is a spike filter on the pin to suppress spikes shorter than 50 ns 16;i the input signal, and the pin is driven by an open drain driver with slew-rate limitation. Please confirm with the C Compiler documentation for more details. Observe that, if enabled, the atmeba32 will trigger even if the INT Bit 1 — OCIE0: However, combined with the timer overflow interrupt that automatically clears the TOV0 Flag, the timer resolution can be increased by software.

If the Flash is never being updated by the CPU, step 2 can be omitted. The Port A pins are tri-stated when a reset condition becomes active, even if the clock is aymega32 running.

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