ATMEGA128A-MU Atmel, ATMEGA128A-MU Datasheet - Page 199

• Manufacturer Part Number: ATMEGA128A-MU
• Description: MCU 8BIT 128K ISP FLASH 64-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA128A-MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 4K 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
• Processor Series: ATMEGA128x
• Core: AVR8
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Controller Family/series: AVR MEGA
• No. Of I/o's: 53
• Eeprom Memory Size: 4KB
• Ram Memory Size: 4KB
• Cpu Speed: 16MHz
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 20-10. Examples of UBRR Settings for Commonly Used Oscillator Frequencies
1.
Table 20-11. Examples of UBRR Settings for Commonly Used Oscillator Frequencies
8151H–AVR–02/11
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
Baud
Rate
(bps)
2400
4800
9600
14.4k
19.2k
28.8k
38.4k
57.6k
76.8k
115.2k
230.4k
250k
(1)
UBRR = 0, Error = 0.0%
UBRR
UBRR
207
103
95
47
23
15
11
51
34
25
16
12
7
5
3
2
1
0
0
–
–
8
6
3
1
1
230.4Kbps
U2X = 0
U2X = 0
f
f
osc
-7.8%
osc
-0.8%
-3.5%
-7.0%
Error
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.2%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
0.0%
–
–
= 3.6864MHz
= 8.0000MHz
UBRR
UBRR
191
416
207
103
95
47
31
23
15
11
68
51
34
25
16
12
7
5
3
1
1
0
–
8
3
3
460.8Kbps
U2X = 1
U2X = 1
-7.8%
-7.8%
-0.1%
-0.8%
-3.5%
Error
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.2%
0.2%
0.6%
0.2%
0.2%
2.1%
0.2%
8.5%
0.0%
–
UBRR
UBRR
103
287
143
51
25
16
12
71
47
35
23
17
11
8
6
3
2
1
0
–
–
8
5
2
2
0
250Kbps
U2X = 0
U2X = 0
f
osc
f
-3.5%
-7.0%
-7.8%
osc
Error
Error
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
8.5%
8.5%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
–
=
= 4.0000MHz
11.0592
UBRR
UBRR
207
103
575
287
143
51
34
25
16
12
95
71
47
35
23
17
11
8
6
3
1
1
0
–
5
5
MHz
0.5Mbps
U2X = 1
U2X = 1
-0.8%
-3.5%
-7.0%
-7.8%
Error
Error
0.2%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
UBRR
UBRR
191
383
191
95
47
31
23
15
11
95
63
47
31
23
15
11
7
5
3
1
1
0
–
7
3
3
460.8Kbps
U2X = 0
U2X = 0
f
f
osc
-7.8%
-7.8%
-7.8%
osc
Error
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
ATmega128A
–
= 14.7456MHz
= 7.3728MHz
UBRR
UBRR
191
383
191
127
383
767
95
63
47
31
23
15
11
95
63
47
31
23
15
7
3
3
1
0
7
6
921.6Kbps
U2X = 1
U2X = 1
-7.8%
-7.8%
-7.8%
Error
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
5.3%
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