ATTINY2313A-MUR Atmel, ATTINY2313A-MUR Datasheet - Page 180

• 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: -

20.2.1
20.3
180
Device Signature Imprint Table
ATtiny2313A/4313
Latching of Fuses
Table 20-5.
Notes:
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.
Fuse bits can also be read by device firmware. See section
page
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.
Fuse Low Byte
CKDIV8
CKOUT
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
Word Address
189.
0x00
0x01
0x02
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
Fuse Low Byte
Contents of Device Signature Imprint Table.
Table 6-4 on page 27
Byte Address
Bit No
0x05 ...
0x00
0x01
0x02
0x03
0x04
7
6
5
4
3
2
1
0
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.
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)
“Reading the Fuse and Lock Bits” on
Default Value
0 (programmed)
1 (unprogrammed)
1 (unprogrammed)
0 (programmed)
0 (programmed)
1 (unprogrammed)
0 (programmed)
0 (programmed)
Table
20-6.
(2)
(2)
(1)
(2)
(2)
(2)
(1)
(2)
8246A–AVR–11/09