ATtiny2313 Atmel Corporation, ATtiny2313 Datasheet - Page 132

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ATtiny2313

Manufacturer Part Number
ATtiny2313
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATtiny2313

Flash (kbytes)
2 Kbytes
Pin Count
20
Max. Operating Frequency
20 MHz
Cpu
8-bit AVR
# Of Touch Channels
4
Hardware Qtouch Acquisition
No
Max I/o Pins
18
Ext Interrupts
18
Usb Speed
No
Usb Interface
No
Spi
2
Twi (i2c)
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
0.12
Eeprom (bytes)
128
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8 to 5.5
Operating Voltage (vcc)
1.8 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
4
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
No
Calibrated Rc Oscillator
Yes

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USART Control and
Status Register C –
UCSRC
132
ATtiny2313
• Bit 6 – UMSEL: USART Mode Select
This bit selects between asynchronous and synchronous mode of operation.
Table 51. UMSEL Bit Settings
• Bit 5:4 – UPM1:0: 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 UPM0 setting.
If a mismatch is detected, the UPE Flag in UCSRA will be set.
Table 52. UPM Bits Settings
• Bit 3 – USBS: Stop Bit Select
This bit selects the number of stop bits to be inserted by the Transmitter. The Receiver ignores
this setting.
Table 53. USBS Bit Settings
• Bit 2:1 – UCSZ1:0: Character Size
The UCSZ1:0 bits combined with the UCSZ2 bit in UCSRB sets the number of data bits (Char-
acter SiZe) in a frame the Receiver and Transmitter use. See
Bit
Read/Write
Initial Value
UPM1
UMSEL
0
0
1
1
0
1
USBS
R
7
0
0
1
UMSEL
R/W
6
0
UPM0
Asynchronous Operation
Synchronous Operation
Mode
0
1
0
1
UPM1
R/W
5
0
Stop Bit(s)
1-bit
2-bit
UPM0
R/W
Parity Mode
Disabled
Reserved
Enabled, Even Parity
Enabled, Odd Parity
0
4
USBS
R/W
3
0
UCSZ1
R/W
2
1
Table 54 on page
UCSZ0
R/W
1
1
UCPOL
R/W
0
0
UCSRC
133.
2543L–AVR–08/10

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