ATmega64 Atmel Corporation, ATmega64 Datasheet - Page 195

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ATmega64

Manufacturer Part Number
ATmega64
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATmega64

Flash (kbytes)
64 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)
2048
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

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Table 83. Examples of UBRR Settings for Commonly Used Oscillator Frequencies (Continued)
1.
2490Q–AVR–06/10
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)
UBRR = 0, Error = 0.0%
UBRRn
95
47
23
15
11
230.4 Kbps
7
5
3
2
1
0
0
U2X = 0
f
osc
-7.8%
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
= 3.6864 MHz
UBRRn
191
95
47
31
23
15
11
460.8 Kbps
7
5
3
1
1
0
U2X = 1
-7.8%
-7.8%
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
UBRRn
103
51
25
16
12
8
6
3
2
1
0
0
250 Kbps
U2X = 0
f
osc
-3.5%
-7.0%
Error
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
8.5%
8.5%
0.0%
= 4.0000 MHz
UBRRn
207
103
51
34
25
16
12
8
6
3
1
1
0
0.5 Mbps
U2X = 1
-0.8%
-3.5%
-7.0%
Error
0.0%
0.2%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
0.0%
UBRRn
191
95
47
31
23
15
11
460.8 Kbps
7
5
3
1
1
0
U2X = 0
f
osc
-7.8%
-7.8%
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
= 7.3728 MHz
ATmega64(L)
UBRRn
383
191
95
63
47
31
23
15
11
921.6 Kbps
7
3
3
1
0
U2X = 1
-7.8%
-7.8%
-7.8%
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
195

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