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AT90PWM2 Scheda tecnica(PDF) 23 Page - ATMEL Corporation

Il numero della parte AT90PWM2
Spiegazioni elettronici  8-bit Microcontroller with 8K Bytes In-System Programmable Flash
PDF  361 Pages
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Produttore elettronici  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90PWM2 Scheda tecnica(HTML) 23 Page - ATMEL Corporation

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4317J–AVR–08/10
AT90PWM2/3/2B/3B
The calibrated Oscillator is used to time the EEPROM accesses. Table 6-2 lists the typical pro-
gramming time for EEPROM access from the CPU.
The following code examples show one assembly and one C function for writing to the
EEPROM. The examples assume that interrupts are controlled (e.g. by disabling interrupts glob-
ally) so that no interrupts will occur during execution of these functions. The examples also
assume that no Flash Boot Loader is present in the software. If such code is present, the
EEPROM write function must also wait for any ongoing SPM command to finish.
Table 6-2.
EEPROM Programming Time.
Symbol
Number of Calibrated RC Oscillator Cycles
Typ Programming Time
EEPROM write
(from CPU)
26368
3.3 ms



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