ATMEGA329P-20MN Atmel, ATMEGA329P-20MN Datasheet - Page 194

• 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

Table 19-3.
1.
8021G–AVR–03/11
Baud
Rate
(bps)
Max.
115.2k
230.4k
14.4k
19.2k
28.8k
38.4k
57.6k
76.8k
2400
4800
9600
250k
(1)
UBRR = 0, Error = 0.0%
UBRRn
25
12
6
3
2
1
1
0
–
–
–
–
Examples of UBRRn Settings for Commonly Used Oscillator Frequencies
U2Xn = 0
62.5kbps
f
Error
-18.6%
osc
-7.0%
0.2%
0.2%
8.5%
8.5%
8.5%
8.5%
–
–
–
–
= 1.0000 MHz
UBRRn
51
25
12
8
6
3
2
1
1
0
–
–
U2Xn = 1
125kbps
Error
-18.6%
-3.5%
-7.0%
0.2%
0.2%
0.2%
8.5%
8.5%
8.5%
8.5%
–
–
UBRRn
47
23
11
7
5
3
2
1
1
0
–
–
115.2kbps
U2Xn = 0
f
osc
Error
-25.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
–
= 1.8432MHz
UBRRn
95
47
23
15
11
230.4kbps
7
5
3
2
1
0
–
U2Xn = 1
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
ATmega329P/3290P
UBRRn
51
25
12
8
6
3
2
1
1
0
–
–
U2Xn = 0
125kbps
f
Error
osc
-18.6%
-3.5%
-7.0%
0.2%
0.2%
0.2%
8.5%
8.5%
8.5%
8.5%
–
–
= 2.0000MHz
UBRRn
103
51
25
16
12
8
6
3
2
1
–
0
U2Xn = 1
250kbps
Error
-3.5%
-7.0%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
8.5%
0.0%
–
194