A000046 Arduino, A000046 Datasheet - Page 198
A000046
Manufacturer Part Number
A000046
Description
MCU, MPU & DSP Development Tools Uno
Manufacturer
Arduino
Series
-r
Type
MCUr
Specifications of A000046
Processor To Be Evaluated
ATmega328
Interface Type
USB, I2C, SPI
Dimensions
2.7 in x 2.1 in
Operating Supply Voltage
5 V
Contents
Board
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
ATmega328
- Current page: 198 of 448
- Download datasheet (13Mb)
8161D–AVR–10/09
• Bits 5:4 – UPMn1:0: Parity Mode
These bits enable and set type of parity generation and check. If enabled, the Transmitter will
automatically generate and send the parity of the transmitted data bits within each frame. The
Receiver will generate a parity value for the incoming data and compare it to the UPMn setting.
If a mismatch is detected, the UPEn Flag in UCSRnA will be set.
Table 19-5.
• Bit 3 – USBSn: Stop Bit Select
This bit selects the number of stop bits to be inserted by the Transmitter. The Receiver ignores
this setting.
Table 19-6.
• Bit 2:1 – UCSZn1:0: Character Size
The UCSZn1:0 bits combined with the UCSZn2 bit in UCSRnB sets the number of data bits
(Character SiZe) in a frame the Receiver and Transmitter use.
Table 19-7.
• Bit 0 – UCPOLn: Clock Polarity
This bit is used for synchronous mode only. Write this bit to zero when asynchronous mode is
used. The UCPOLn bit sets the relationship between data output change and data input sample,
and the synchronous clock (XCKn).
UCSZn2
UPMn1
0
0
1
1
0
0
0
0
1
1
1
1
UPMn Bits Settings
USBS Bit Settings
UCSZn Bits Settings
USBSn
0
1
UCSZn1
UPMn0
0
1
0
1
0
0
1
1
0
0
1
1
ATmega48PA/88PA/168PA/328P
Parity Mode
Disabled
Reserved
Enabled, Even Parity
Enabled, Odd Parity
Stop Bit(s)
1-bit
2-bit
UCSZn0
0
1
0
1
0
1
0
1
Character Size
5-bit
6-bit
7-bit
8-bit
Reserved
Reserved
Reserved
9-bit
198
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