ATTINY28V-1MU Atmel, ATTINY28V-1MU Datasheet - Page 51

• 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

Reading the Fuse and Lock
Bits
Reading the Signature Bytes
and Calibration Byte
1062F–AVR–07/06
The algorithm for reading the Fuse and Lock bits is as follows (refer to “Programming
the Flash” for details on command loading):
A: Load Command “0000 0100”.
1. Set OE to “0”, and BS to “0”. The status of the Fuse bits can now be read at
2. Set BS to “1”. The status of the Lock bits can now be read at DATA (“0” means
3. Set OE to “1”.
The algorithm for reading the signature bytes and the calibration byte is as follows (refer
to “Programming the Flash” for details on command and address loading):
A: Load Command “0000 1000”.
C: Load Address Low Byte ($00 - $02).
1. Set OE to “0”, and BS to “0”. The selected signature byte can now be read at
C: Load Address Low Byte ($00).
1. Set OE to “0”, and BS to “1”. The calibration byte can now be read at DATA.
2. Set OE to “1”.
Figure 38. Programming the Flash Waveforms
RDY/BSY
RESET
XTAL1
DATA
DATA (“0” means programmed).
Bit 4 = INTCAP Fuse
Bit 3 = CKSEL3 Fuse
Bit 2 = CKSEL2 Fuse
Bit 1 = CKSEL1 Fuse
Bit 0 = CKSEL0 Fuse
programmed).
Bit 2: Lock Bit2
Bit 1: Lock Bit1
DATA.
XA1
XA0
WR
OE
BS
12V
$10
ADDR. HIGH
ADDR. LOW
DATA LOW
ATtiny28L/V
51