ATMEGA324A-MU Atmel, ATMEGA324A-MU Datasheet - Page 197
![IC MCU AVR 32K 20MHZ 44VQFN](/photos/12/13/121316/313-44-qfn_sml.jpg)
ATMEGA324A-MU
Manufacturer Part Number
ATMEGA324A-MU
Description
IC MCU AVR 32K 20MHZ 44VQFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA324A-MU
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
32
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-VQFN Exposed Pad
Processor Series
ATmega
Core
AVR
Data Bus Width
8 bit
Data Ram Size
2 KB
Interface Type
JTAG, TWI, SPI, USART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Operating Temperature Range
- 40 C to + 85 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Table 18-11. 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
207
103
51
34
25
16
12
8
6
3
1
1
0
–
U2Xn = 0
0.5 Mbps
f
Error
osc
-0.8%
-3.5%
-7.0%
0.2%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
0.0%
0.0%
–
= 8.0000 MHz
164A/164PA/324A/324PA/644A/644PA/1284/1284P
UBRR
416
207
103
68
51
34
25
16
12
8
3
3
1
0
U2Xn = 1
1 Mbps
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%
UBRR
287
143
71
47
35
23
17
11
8
5
2
2
–
–
691.2 kbps
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%
=
–
–
11.0592
UBRR
575
287
143
95
71
47
35
23
17
11
1.3824 Mbps
5
5
2
–
MHz
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%
–
UBRR
383
191
95
63
47
31
23
15
11
7
3
3
1
0
921.6 kbps
U2Xn = 0
f
osc
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%
= 14.7456 MHz
UBRR
383
191
127
767
1.8432 Mbps
95
63
47
31
23
15
7
6
3
1
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%
5.3%
197
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