ATmega325P datasheet(286/364 Pages) ATMEL

Part #	ATmega325P

Description	8-bit Microcontroller with 32K Bytes In-System Programmable Flash

PDF	364 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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286 / 364 page

286

8023F–AVR–07/09

ATmega325P/3250P

Figure 25-10. Serial Programming and Verify

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Notes:

1. If the device is clocked by the internal Oscillator, it is no need to connect a clock source to the

XTAL1 pin.

2. V

CC - 0.3V < AVCC < VCC + 0.3V, however, AVCC should always be within 1.8 - 5.5V

When programming the EEPROM, an auto-erase cycle is built into the self-timed programming

operation (in the Serial mode ONLY) and there is no need to first execute the Chip Erase

instruction. The Chip Erase operation turns the content of every memory location in both the

Program and EEPROM arrays into 0xFF.

Depending on CKSEL Fuses, a valid clock must be present. The minimum low and high periods

for the serial clock (SCK) input are defined as follows:

Low: > 2 CPU clock cycles for f

ck < 12 MHz, 3 CPU clock cycles for fck >= 12 MHz

High: > 2 CPU clock cycles for f

ck < 12 MHz, 3 CPU clock cycles for fck >= 12 MHz

VCC

GND

XTAL1

SCK

MISO

MOSI

RESET

+1.8 - 5.5V

AVCC

+1.8 - 5.5V

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ATmega325P Datasheet(PDF) 286 Page - ATMEL Corporation