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This mode allows greater control of the compare match output frequency. If low level interrupt is selected, the low level must be held until the completion of the currently executing instruction to generate an interrupt. In particular, the following modules may need special consideration when trying to achieve the lowest possible power consumption.
ATMEGAPI Datasheet(PDF) – ATMEL Corporation
If the interrupt is enabled, the interrupt handler routine can be used for updating the com- pare value. If selected, it will operate with no external components. There are basically two types of interrupts.
If the program never enables an interrupt source, the Interrupt Vectors are not used, and regular program code can be placed at these loca- tions. This might corrupt the result of the conversion. If the reference is kept on in sleep mode, the output can be used immediately.
Bit 0 — EERE: If DDxn is written logic one, Pxn is configured as an output pin. Please select an existing parts list. From Standby mode, the device wakes up in six clock cycles. This mode has a limited frequency range and it can not be used to drive other clock buffers.
Program flow is provided by conditional and unconditional jump and call instructions, able to directly address the whole address space. In Power-save mode, the Asynchronous Timer continues to run, allowing the user to maintain a timer base while the rest of the device is sleeping.
The noise canceler input is monitored over four samples, and all four must be equal for changing the output that in turn is used by the edge detector. Alternatively, OCF0 is cleared by writing a logic one to the flag. Pulses on INT2 wider than the minimum pulse width given in Table 36 will generate an interrupt.
The I-bit is cleared by hardware after an interrupt has occurred, and is set by the RETI instruction to enable subsequent interrupts. Save to an existing parts list Save to a new parts list. The user software can poll this bit and wait for a zero before writing the next byte. The assembly code example requires that the r If one or both of the COM For timing details on the Watchdog Reset, refer to page Sending feedback, please wait This is not shown in the figure.
Table 20 summarizes the control signals for the pin value. The five different addressing modes for the data memory cover: In inverting Output Compare mode, the operation is inverted.
The OC0 value will not be visible on the port pin unless the data direction for the pin is set to output.
ATMEGA32-16PI Manu:AIMEL Package:DIP-40,8-bit AVR Microcontroller
The counter reaches the TOP when it becomes equal to the highest value in the count sequence. This is needed to avoid metastability if the physical pin changes value near the edge of the internal clock, but it also introduces a delay.
When turned on again, the user must allow the reference to start up before the output is used. The PWM frequency for the output can be calculated by the following equation: The Status Register is not automatically stored when entering an interrupt routine and restored when returning from an interrupt.
The waveform frequency is defined by the following equation: The Port B pins are tri-stated when a reset condition 16pu active, even if the clock is not running. This implies that these interrupts can be used for waking the part also from sleep modes other than Idle mode.
Bit atmgea32, 3 — WGM The level and edges on the external INT1 pin that activate the interrupt are defined in Table Either a quartz crystal or a ceramic resonator may be used. The clkT1 can be generated from an external or internal clock source, selected by the Clock Select bits CS