ATTINY2313A-MUR Atmel, ATTINY2313A-MUR Datasheet - Page 181

• Manufacturer Part Number: ATTINY2313A-MUR
• Description: MCU AVR 2K FLASH 20MHZ 20QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

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: -

20.3.1
20.3.2
20.4
8246A–AVR–11/09
Page Size
Calibration Byte
Signature Bytes
Notes:
The signature area of the ATtiny2313A/4313 contains two bytes of calibration data for the inter-
nal oscillator. The calibration data in the high byte of address 0x00 is for use with the oscillator
set to 8.0 MHz operation. During reset, this byte is automatically written into the OSCCAL regis-
ter to ensure correct frequency of the oscillator.
There is a separate calibration byte for the internal oscillator in 4.0 MHz mode of operation but
this data is not loaded automatically. The hardware always loads the 8.0 MHz calibration data
during reset. To use separate calibration data for the oscillator in 4.0 MHz mode the OSCCAL
register must be updated by firmware. The calibration data for 4.0 MHz operation is located in
the high byte at address 0x01 of the signature area.
All Atmel microcontrollers have a three-byte signature code which identifies the device. This
code can be read in both serial and parallel mode, also when the device is locked. The three
bytes reside in a separate address space.
For the ATtiny2313A the signature bytes are:
For the ATtiny4313 the signature bytes are:
Table 20-7.
Table 20-8.
Device
ATtiny2313A
ATtiny4313
Device
ATtiny2313A
ATtiny4313
1. 0x000: 0x1E (indicates manufactured by Atmel).
2. 0x001: 0x91 (indicates 2KB Flash memory).
3. 0x002: 0x0A (indicates ATtiny2313A device when 0x001 is 0x91).
1. 0x000: 0x1E (indicates manufactured by Atmel).
2. 0x001: 0x92 (indicates 4KB Flash memory).
3. 0x002: 0x0D (indicates ATtiny4313 device when 0x001 is 0x92).
1. See section “Signature Bytes” for more information.
2. See section “Calibration Byte” for more information.
No. of Words in a Page and No. of Pages in the Flash
No. of Words in a Page and No. of Pages in the EEPROM
1K word
(2K bytes)
2K words
(4K bytes)
Flash Size
EEPROM
128 bytes
256 bytes
Size
Page Size
Page Size
16 words
32 words
4 bytes
4 bytes
PCWORD
PCWORD
EEA[1:0]
EEA[1:0]
PC[3:0]
PC[4:0]
No. of Pages
No. of Pages
32
64
64
64
PCPAGE
EEA[6:2]
EEA[7:2]
PCPAGE
PC[10:5]
PC[9:4]
EEAMSB
PCMSB
10
6
7
9
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