ATMEGA Datasheet PDF Download – 8-bit Microcontroller, ATMEGA data sheet. Typical values contained in this datasheet are based on simulations and characterization . The ATmega is % pin compatible with ATmega, and can. ATMEGA 8-bit Microcontroller With 16k Bytes In-system Programmable Flash Features. High-performance, Low-power AVR® 8-bit Microcontroller Advanced.
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Increased Interrupt Latency In ATmega, all instructions are interruptable, and no dead-lock situation exists if a loop is followed by a two-word instruction for the purpose of looping until an interrupt goes active.
If these status bits were cleared by writing 0xFF to the register in ATmega, this may trigger incorrect behavior when ported to ATmega, since atmega1661 new control bits will be set.
See the ATmega data sheet for details. In this device, some atmeega161 are not interruptable, and will cause the interrupt. The only practical problem concerns a loop followed by a two. This is in both devices regardless of the clock source and frequency of the system clock.
Atm el O pe ra tions.
manual – Page 2 – Cristian COPCEA
The ATmega has two operating modes selected through the fuse settings. This means that the following six Interrupt Vectors disappears, and vectors from number 11 to 28 moved up to become vectors number 5 to Some of the fuses are described further in the following sections. PWM not Phase Correct.
Refer to the data sheet for ATmega for further information. Other terms and product names may be the trademarks of others Printed on recycled paper. Colorado Springs, CO Changes to Names The following control bits have changed names, but have the same functionality and placement when accessed as in ATmega The program counter will be updated with a wrong value.
Make sure this issue is not harmful to the application. The following bits have changed locations, but have the same atmegs161 when accessed as in ATmega TEL 1 Note that since the crystal oscillator in ATmega does not have a rail-to-rail amplitude, it is not possible to clock other units directly from the XTAL2 pin.
When the compatibility mode is used, only non-conflicting enhancements make the part different from the ATmega Atme l Headquarte rs. Otherwise the system oscillator will continue to run, drawing additional current.
Refer to data sheet for details. No licenses to patents datashfet other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. It is called AS0 elsewhere in that data sheet, as well as everywhere in ATmega Refer to the ATmega data sheet for details on the changed timing. The frequency of the Watchdog Oscillator in ATmega is close to 1.
Therefore the status bits must always be read before the UDR Register is read.
The Company assumes no responsibility for any errors. In assembly, insert a nop instruction immediately after a loop to itself. Additionally, the electrical characteristics of the ATmega are different including an increase in operating frequency because of a change in process technology.
Pointer addresses external memory. The typical frequency of the Watchdog Oscillator in ATmega is close to 1.
TOP does not change the OCx output. Atmel’s products are not authorized for use as critical. Avoid using the SPM instruction. See description in ATmega atmegga161 sheet for further information. The loop may consist of a branch.
Atmel Cor poration makes no atmeha161 for the use of its products, other than those expressly contained in the Company’s standard warranty. Route des Arsenaux At certain frequencies and voltages, the store program memory SPM instruction may fail.
Table 4 shows the ATmega compatible fuse settings. Other terms and product names may be the trademarks of others.
In C, the only construct that will. This will increase noise immunity when using high frequencies.