ATMEGA3290PV-10AUR Atmel, ATMEGA3290PV-10AUR Datasheet - Page 193
ATMEGA3290PV-10AUR
Manufacturer Part Number
ATMEGA3290PV-10AUR
Description
MCU AVR 32K FLASH 10MHZ 64TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA3290PV-10AUR
Core Processor
AVR
Core Size
8-Bit
Speed
10MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
69
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
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Manufacturer
Quantity
Price
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19.10.5
19.11 Examples of Baud Rate Setting
8021G–AVR–03/11
UBRRnL and UBRRnH – USART Baud Rate Registers n
Figure 19-13. UCPOLn Bit Settings
• Bit 15:12 – Reserved Bits
These bits are reserved for future use. For compatibility with future devices, these bit must be
written to zero when UBRRnH is written.
• Bit 11:0 – UBRR11:0: USART Baud Rate Register
This is a 12-bit register which contains the USART baud rate. The UBRRnH contains the four
most significant bits, and the UBRRnL contains the eight least significant bits of the USART
baud rate. Ongoing transmissions by the Transmitter and Receiver will be corrupted if the baud
rate is changed. Writing UBRRnL will trigger an immediate update of the baud rate prescaler.
For standard crystal and resonator frequencies, the most commonly used baud rates for asyn-
chronous operation can be generated by using the UBRRn settings in
values which yield an actual baud rate differing less than 0.5% from the target baud rate, are
bold in the table. Higher error ratings are acceptable, but the Receiver will have less noise resis-
tance when the error ratings are high, especially for large serial frames (see
Operational Range” on page
Bit
Read/Write
Initial Value
UCPOLn
0
1
R/W
15
R
–
7
0
0
R/W
14
Transmitted Data Changed (Output
of TxD Pin)
Rising XCK Edge
Falling XCK Edge
R
–
6
0
0
Error[%]
186). The error values are calculated using the following equation:
R/W
13
R
–
5
0
0
=
⎛
⎝
BaudRate
------------------------------------------------------- - 1
R/W
12
BaudRate
R
–
4
0
0
UBRRn[7:0]
Closest Match
R/W
R/W
11
3
0
0
ATmega329P/3290P
–
⎞
⎠
R/W
R/W
10
2
0
0
UBRRn[11:8]
•
Received Data Sampled (Input
on RxD Pin)
Falling XCK Edge
Rising XCK Edge
100%
R/W
R/W
9
1
0
0
Table
R/W
R/W
”Asynchronous
8
0
0
0
19-3. UBRRn
UBRRnH
UBRRnL
193
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