ATMEGA328P-20PU Atmel, ATMEGA328P-20PU Datasheet - Page 198

• Manufacturer Part Number: ATMEGA328P-20PU
• Manufacturer: Atmel

Specifications of ATMEGA328P-20PU

• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Interface Type: SPI/TWI/USART
• Program Memory Type: Flash
• Program Memory Size: 32KB
• Total Internal Ram Size: 2KB
• # I/os (max): 23
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 6-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 28
• Package Type: PDIP
• Lead Free Status / Rohs Status: Compliant

Table 19-10. Examples of UBRRn Settings for Commonly Used Oscillator Frequencies (Continued)
1.
8025K–AVR–10/09
Baud
Rate
(bps)
2400
4800
9600
14.4k
19.2k
28.8k
38.4k
57.6k
76.8k
115.2k
230.4k
250k
0.5M
1M
Max.
(1)
UBRRn = 0, Error = 0.0%
f
U2Xn = 0
UBRRn
osc
95
47
23
15
11
230.4 kbps
7
5
3
2
1
0
0
–
–
= 3.6864 MHz
Error
-7.8%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
–
UBRRn
U2Xn = 1
191
95
47
31
23
15
11
460.8 kbps
7
5
3
1
1
0
–
Error
-7.8%
-7.8%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
f
U2Xn = 0
UBRRn
osc
103
51
25
16
12
8
6
3
2
1
0
0
–
–
250 kbps
= 4.0000 MHz
Error
-3.5%
-7.0%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
8.5%
8.5%
0.0%
–
–
U2Xn = 1
UBRRn
207
103
51
34
25
16
12
8
6
3
1
1
0
–
0.5 Mbps
Error
-0.8%
-3.5%
-7.0%
0.0%
0.2%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
0.0%
–
ATmega48P/88P/168P
f
U2Xn = 0
UBRRn
osc
191
95
47
31
23
15
11
460.8 kbps
7
5
3
1
1
0
–
= 7.3728 MHz
Error
-7.8%
-7.8%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
U2Xn = 1
UBRRn
383
191
95
63
47
31
23
15
11
921.6 kbps
7
3
3
1
0
Error
-7.8%
-7.8%
-7.8%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
198