ATmega128A Atmel Corporation, ATmega128A Datasheet - Page 200

• Manufacturer Part Number: ATmega128A
• Manufacturer: Atmel Corporation

Specifications of ATmega128A

• Flash (kbytes): 128 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 4096
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

Table 20-11. Examples of UBRR Settings for Commonly Used Oscillator Frequencies (Continued)
1.
Table 20-12. Examples of UBRR Settings for Commonly Used Oscillator Frequencies
1.
8151H–AVR–02/11
Baud
Rate
(bps)
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
0.5M
1M
Max
(1)
(1)
UBRR = 0, Error = 0.0%
UBRR = 0, Error = 0.0%
UBRR
0
–
0.5Mbps
U2X = 0
f
osc
Error
0.0%
–
= 8.0000MHz
UBRR
1
0
UBRR
U2X = 1
1Mbps
416
207
103
68
51
34
25
16
12
8
3
3
1
0
Error
0.0%
0.0%
U2X = 0
1Mbps
UBRR
–
–
691.2Kbps
U2X = 0
f
osc
-0.1%
-0.8%
-3.5%
Error
Error
0.2%
0.2%
0.6%
0.2%
0.2%
2.1%
0.2%
8.5%
0.0%
0.0%
0.0%
=
–
–
11.0592
f
osc
UBRR
= 16.0000MHz
1.3824Mbps
2
–
MHz
U2X = 1
-7.8%
Error
–
UBRR
832
416
207
138
103
68
51
34
25
16
8
7
3
1
UBRR
1
0
921.6Kbps
U2X = 0
U2X = 1
2Mbps
f
osc
-7.8%
-7.8%
Error
ATmega128A
= 14.7456MHz
UBRR
1.8432Mbps
-0.1%
-0.1%
-0.8%
-3.5%
3
1
Error
0.0%
0.2%
0.2%
0.6%
0.2%
0.2%
2.1%
0.0%
0.0%
0.0%
U2X = 1
-7.8%
-7.8%
Error
200