ATMEGA88-20AI Atmel, ATMEGA88-20AI Datasheet - Page 195
ATMEGA88-20AI
Manufacturer Part Number
ATMEGA88-20AI
Description
IC MCU AVR 8K 5V 20MHZ 32-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA88-20AI
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K 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
32-TQFP, 32-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
ATMEGA88-24AI
ATMEGA88-24AI
ATMEGA88-24AI
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Table 19-10. Examples of UBRRn Settings for Commonly Used Oscillator Frequencies (Continued)
1.
2545S–AVR–07/10
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)
UBRRn = 0, Error = 0.0%
f
UBRRn
osc
95
47
23
15
11
230.4 Kbps
7
5
3
2
1
0
0
–
–
U2Xn = 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
191
95
47
31
23
15
11
460.8 Kbps
7
5
3
1
1
0
–
U2Xn = 1
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
UBRRn
osc
103
51
25
16
12
8
6
3
2
1
0
0
–
–
U2Xn = 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%
–
–
UBRRn
207
103
51
34
25
16
12
8
6
3
1
1
0
–
U2Xn = 1
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%
–
f
UBRRn
osc
191
95
47
31
23
15
11
460.8 Kbps
7
5
3
1
1
0
–
U2Xn = 0
= 7.3728 MHz
ATmega48/88/168
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%
–
UBRRn
383
191
95
63
47
31
23
15
11
921.6 Kbps
7
3
3
1
0
U2Xn = 1
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%
195
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