ATTINY2313A-MUR Atmel, ATTINY2313A-MUR Datasheet - Page 128
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ATTINY2313A-MUR
Manufacturer Part Number
ATTINY2313A-MUR
Description
MCU AVR 2K FLASH 20MHZ 20QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.ATTINY2313A-MU.pdf
(270 pages)
Specifications of ATTINY2313A-MUR
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
18
Program Memory Size
2KB (1K x 16)
Program Memory Type
FLASH
Eeprom Size
128 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
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14.6.4
14.6.5
128
ATtiny2313A/4313
Parity Generator
Disabling the Transmitter
contains data to be transmitted that has not yet been moved into the Shift Register. For compat-
ibility with future devices, always write this bit to zero when writing the UCSRA Register.
When the Data Register Empty Interrupt Enable (UDRIE) bit in UCSRB is written to one, the
USART Data Register Empty Interrupt will be executed as long as UDRE is set (provided that
global interrupts are enabled). UDRE is cleared by writing UDR. When interrupt-driven data
transmission is used, the Data Register Empty interrupt routine must either write new data to
UDR in order to clear UDRE or disable the Data Register Empty interrupt, otherwise a new inter-
rupt will occur once the interrupt routine terminates.
The Transmit Complete (TXC) flag bit is set one when the entire frame in the Transmit Shift Reg-
ister has been shifted out and there are no new data currently present in the transmit buffer. The
TXC flag bit is automatically cleared when a transmit complete interrupt is executed, or it can be
cleared by writing a one to its bit location. The TXC flag is useful in half-duplex communication
interfaces (like the RS-485 standard), where a transmitting application must enter receive mode
and free the communication bus immediately after completing the transmission.
When the Transmit Compete Interrupt Enable (TXCIE) bit in UCSRB is set, the USART Transmit
Complete Interrupt will be executed when the TXC flag becomes set (provided that global inter-
rupts are enabled). When the transmit complete interrupt is used, the interrupt handling routine
does not have to clear the TXC flag, this is done automatically when the interrupt is executed.
The Parity Generator calculates the parity bit for the serial frame data. When parity bit is enabled
(UPM1 = 1), the transmitter control logic inserts the parity bit between the last data bit and the
first stop bit of the frame that is sent.
The disabling of the Transmitter (setting the TXEN to zero) will not become effective until ongo-
ing and pending transmissions are completed, i.e., when the Transmit Shift Register and
Transmit Buffer Register do not contain data to be transmitted. When disabled, the Transmitter
will no longer override the TxD pin.
8246A–AVR–11/09
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