ATTINY28V-1MU Atmel, ATTINY28V-1MU Datasheet - Page 9
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ATTINY28V-1MU
Manufacturer Part Number
ATTINY28V-1MU
Description
IC MCU AVR 2K 1.8V 1.2MHZ 32-QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY28V-1MU
Core Processor
AVR
Core Size
8-Bit
Speed
1.2MHz
Peripherals
POR, WDT
Number Of I /o
11
Program Memory Size
2KB (1K x 16)
Program Memory Type
FLASH
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
Processor Series
ATTINY2x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
32 B
Maximum Clock Frequency
1.2 MHz
Number Of Programmable I/os
11
Number Of Timers
1
Operating Supply Voltage
1.8 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
8 bit
For Use With
ATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIPATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Ram Size
-
Data Converters
-
Connectivity
-
Lead Free Status / Rohs Status
Details
Register Description
Oscillator Calibration Register
– OSCCAL
1062F–AVR–07/06
• Bits 7..0 – CAL7..CAL0: Oscillator Calibration Value
Writing the calibration byte to this address will trim the internal oscillator to remove pro-
cess variation from the oscillator frequency. When OSCCAL is zero, the lowest available
frequency is chosen. Writing non-zero values to the register will increase the frequency
to the internal oscillator. Writing $FF to the register gives the highest available fre-
quency. Table 2 shows the range for OSCCAL. Note that the oscillator is intended for
calibration to 1.2 MHz, thus tuning to other values is not guaranteed. At 3V and 25
the pre-programmed calibration byte gives a frequency within ± 1% of the nominal
frequency.
Table 2. Internal RC Oscillator Range
Bit
$00
Read/Write
Initial Value
OSCCAL Value
0x00
0x7F
0xFF
CAL7
R/W
7
0
CAL6
R/W
6
0
Min Frequency
0.6 MHz
0.8 MHz
1.2 MHz
CAL5
R/W
5
0
CAL4
R/W
4
0
CAL3
R/W
3
0
CAL2
R/W
2
0
Max Frequency
1.2 MHz
1.7 MHz
2.5 MHz
CAL1
ATtiny28L/V
R/W
1
0
CAL0
R/W
0
0
OSCCAL
o
C,
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