ATtiny2313A Atmel Corporation, ATtiny2313A Datasheet - Page 180

• Manufacturer Part Number: ATtiny2313A
• Manufacturer: Atmel Corporation

Specifications of ATtiny2313A

• Flash (kbytes): 2 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• 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: Yes
• 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

20.2.1
20.3
180
Device Signature Imprint Table
ATtiny2313A/4313
Latching of Fuses
Table 20-5.
Note:
Fuse bits are locked when Lock Bit 1 (LB1) is programmed. Hence, fuse bits must be pro-
grammed before lock bits.
Fuse bits are not affected by a Chip Erase.
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.
The device signature imprint table is a dedicated read only memory area used for storing miscel-
laneous device information, such as the device signature and oscillator calibration data. Most of
this memory segment is reserved for internal use, as outlined in
Byte addresses are used when the device itself reads the data with the LPM command. External
programming devices must use word addresses.
Table 20-6.
Notes:
Word Address
Bit #
7
6
5
4
3
2
1
0
0x00
0x01
0x02
1. Unprogramming this fuse at low voltages may result in overclocking. See
2. This setting results in maximum start-up time for the default clock source.
3. This setting selects Calibrated Internal RC Oscillator.
1. See section “Signature Bytes” for more information.
CKDIV8
CKOUT
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
Bit Name
200
Low Fuse Byte
Contents of Device Signature Imprint Table.
for device speed versus supply voltage.
Byte Address
0x05 ...
0x00
0x01
0x02
0x03
0x04
Use
Divides clock by 8
Outputs system clock on port pin
–
Sets system start-up time
Selects clock source
High Byte
Signature byte 0
Calibration data for internal 8 MHz oscillator
Signature byte 1
Calibration data for internal 4 MHz oscillator
Signature byte 2
Reserved for internal use
(1)
(1)
(1)
(1)
See
Page
Page
Pages 28,
29, and
Page
Table
28
32
27
31
20-6.
Default Value
0 (programmed)
1 (unprogrammed)
1 (unprogrammed)
0 (programmed)
0 (programmed)
0 (programmed)
1 (unprogrammed)
0 (programmed)
Section 22.3 on page
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8246B–AVR–09/11
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