ATtiny2313 Atmel Corporation, ATtiny2313 Datasheet - Page 160

• Manufacturer Part Number: ATtiny2313
• Manufacturer: Atmel Corporation

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

Latching of Fuses
Signature Bytes
Calibration Byte
Page Size
160
ATtiny2313
Table 68. Fuse Low Byte
Note:
The status of the Fuse bits is not affected by Chip Erase. Note that the Fuse bits are locked if
Lock bit1 (LB1) is programmed. Program the Fuse bits before programming the Lock bits.
The fuse values are latched when the device enters programming mode and changes of the
fuse values will have no effect until the part leaves Programming mode. This does not apply to
the EESAVE Fuse which will take effect once it is programmed. The fuses are also latched on
Power-up in Normal mode.
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 ATtiny2313 the signature bytes are:
1. 0x000: 0x1E (indicates manufactured by Atmel).
2. 0x001: 0x91 (indicates 2KB Flash memory).
3. 0x002: 0x0A (indicates ATtiny2313 device when 0x001 is 0x91).
Signature area of ATtiny2313 has one byte of calibration data for the internal RC Oscillator. This
byte resides in the high byte of address 0x0000. During reset, this byte is automatically written
into the OSCCAL Register to ensure correct frequency of the calibrated RC Oscillator. See
“Oscillator Calibration Register – OSCCAL” on page
Table 69. No. of Words in a Page and No. of Pages in the Flash
Table 70. No. of Words in a Page and No. of Pages in the EEPROM
Fuse Low Byte
CKDIV8
CKOUT
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
1K words (2K bytes)
EEPROM Size
Flash Size
128 bytes
1. The default value of SUT1..0 results in maximum start-up time for the default clock source.
2. The default setting of CKSEL3..0 results in internal RC Oscillator @ 8 MHz.
See
Table 15 on page 34
Bit No
Page Size
Page Size
16 words
7
6
5
4
3
2
1
0
4 bytes
Description
Divide clock by 8
Output Clock on CKOUT pin
Select start-up time
Select start-up time
Select Clock source
Select Clock source
Select Clock source
Select Clock source
for details.
PCWORD
PCWORD
EEA[1:0]
PC[3:0]
No. of Pages
No. of Pages
26.
32
64
Default Value
0 (programmed)
1 (unprogrammed)
1 (unprogrammed)
0 (programmed)
0 (programmed)
1 (unprogrammed)
0 (programmed)
0 (programmed)
PCPAGE
EEA[6:2]
PCPAGE
PC[9:4]
(1)
(2)
(2)
(2)
EEAMSB
PCMSB
(1)
(2)
9
6
2543L–AVR–08/10