ATMEGA164A-MCHR Atmel, ATMEGA164A-MCHR Datasheet - Page 198
ATMEGA164A-MCHR
Manufacturer Part Number
ATMEGA164A-MCHR
Description
IC MCU AVR 16K 20MHZ 44QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA164A-MCHR.pdf
(581 pages)
Specifications of ATMEGA164A-MCHR
Package / Case
44-VQFN Exposed Pad
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Speed
20MHz
Number Of I /o
32
Eeprom Size
512 x 8
Core Processor
AVR
Program Memory Type
FLASH
Ram Size
1K x 8
Program Memory Size
16KB (16K x 8)
Data Converters
A/D 8x10b
Oscillator Type
Internal
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Connectivity
I²C, SPI, UART/USART
Core Size
8-Bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Table 18-12. Examples of UBRRn Settings for Commonly Used Oscillator Frequencies (Continued)
1.
8272A–AVR–01/10
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%
UBRR
416
207
103
68
51
34
25
16
12
8
3
3
1
0
U2Xn = 0
1 Mbps
f
osc
Error
-0.1%
-0.8%
-3.5%
0.2%
0.2%
0.6%
0.2%
0.2%
2.1%
0.2%
8.5%
0.0%
0.0%
0.0%
= 16.0000 MHz
164A/164PA/324A/324PA/644A/644PA/1284/1284P
UBRR
832
416
207
138
103
68
51
34
25
16
8
7
3
1
U2Xn = 1
2 Mbps
Error
-0.1%
-0.1%
-0.8%
-3.5%
0.0%
0.2%
0.2%
0.2%
0.2%
2.1%
0.0%
0.0%
0.0%
0.6%
UBRR
479
239
119
79
59
39
29
19
14
9
4
4
–
–
1.152 Mbps
U2Xn = 0
f
osc
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%
–
–
= 18.4320 MHz
UBRR
959
479
239
159
119
59
39
29
19
79
2.304 Mbps
9
8
4
–
U2Xn = 1
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%
2.4%
–
UBRR
520
259
129
86
64
42
32
21
15
10
4
4
–
–
1.25 Mbps
U2Xn = 0
f
osc
Error
-0.2%
-1.4%
-1.4%
-1.4%
0.0%
0.2%
0.2%
0.2%
0.9%
1.7%
8.5%
0.0%
–
–
= 20.0000 MHz
UBRR
1041
173
129
520
259
86
64
42
32
21
10
9
4
–
U2Xn = 1
2.5 Mbps
Error
-0.2%
-1.4%
-1.4%
-1.4%
-0.2%
0.0%
0.0%
0.2%
0.2%
0.2%
0.9%
0.0%
0.0%
–
198
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