ATMEGA329P-20MN Atmel, ATMEGA329P-20MN Datasheet - Page 301

• Manufacturer Part Number: ATMEGA329P-20MN
• Description: IC MCU AVR 32K 20MHZ 64QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA329P-20MN

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-MLF®, 64-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8021G–AVR–03/11
Table 27-10. Pin Values Used to Enter Programming Mode
Table 27-11. XA1 and XA0 Coding
Table 27-12. Command Byte Bit Coding
Table 27-13. No. of Words in a Page and No. of Pages in the Flash
Table 27-14. No. of Words in a Page and No. of Pages in the EEPROM
XA1
EEPROM Size
0
0
1
1
Flash Size
(32Kbytes)
16K words
Command Byte
1Kbytes
1000 0000
0100 0000
0010 0000
0001 0000
0001 0001
0000 1000
0000 0100
0000 0010
0000 0011
PAGEL
XA1
XA0
BS1
Pin
XA0
0
1
0
1
Page Size
Page Size
64 words
Action when XTAL1 is Pulsed
Load Flash or EEPROM Address (High or low address byte determined by
BS1).
Load Data (High or Low data byte for Flash determined by BS1).
Load Command
No Action, Idle
4bytes
Command Executed
Chip Erase
Write Fuse bits
Write Lock bits
Write Flash
Write EEPROM
Read Signature Bytes and Calibration byte
Read Fuse and Lock bits
Read Flash
Read EEPROM
PCWORD
PCWORD
EEA[1:0]
PC[5:0]
Prog_enable[3]
Prog_enable[2]
Prog_enable[1]
Prog_enable[0]
Symbol
No. of Pages
No. of Pages
ATmega329P/3290P
256
256
EEA[13:2]
PCPAGE
PC[13:6]
PCPAGE
Value
0
0
0
0
EEAMSB
PCMSB
13
13
301