ATTINY45-20SI Atmel, ATTINY45-20SI Datasheet - Page 152
ATTINY45-20SI
Manufacturer Part Number
ATTINY45-20SI
Description
IC AVR MCU 4K 20MHZ 8SOIC
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY45-20SI
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
6
Program Memory Size
4KB (2K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATTINY45-20SI
Manufacturer:
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Quantity:
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20.2
152
Fuse Bytes
ATtiny25/45/85
ATtiny25/45/85 has three fuse bytes, as described in
Note that fuses are read as logical zero, “0”, when programmed.
Table 20-3.
Notes:
Table 20-4.
Notes:
SELFPRGEN
RSTDISBL
DWEN
SPIEN
WDTON
EESAVE
BODLEVEL2
BODLEVEL1
BODLEVEL0
Fuse High Byte
Fuse High Byte
(4)
1. Enables SPM instruction. See
(1) (2) (3)
1. Controls use of RESET pin. See
2. After this fuse has been programmed device can be programmed via high-voltage serial mode,
3. Must be unprogrammed when lock bit security is required.
4. This fuse is not accessible in SPI programming mode.
5. See
6. See table
(5)
only.
Lock Bits” on page 151.
(1) (2)
(6)
(6)
(6)
(1)
Fuse Extended Byte
Fuse High Byte
“WDTCR – Watchdog Timer Control Register” on page 47
“BODLEVEL Fuse Coding” on page
Bit No
Bit No
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Description
-
-
-
-
-
-
-
Self-programming enabled
Description
External reset disabled
DebugWIRE enabled
Serial program and data download
enabled
Watchdog timer always on
EEPROM preserves chip erase
Brown-out Detector trigger level
Brown-out Detector trigger level
Brown-out Detector trigger level
“Self-Programming the Flash” on page
“Alternate Functions of Port B” on page
171.
Table
20-3,
See “Program And Data Memory
Table
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
Default Value
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
Default Value
0 (programmed)
(SPI prog. enabled)
1 (unprogrammed)
1 (unprogrammed)
(EEPROM not preserved)
for details.
20-4, and
145.
62.
2586M–AVR–07/10
Table
20-5.
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