ATTINY26-16PI Atmel, ATTINY26-16PI Datasheet - Page 112

• Manufacturer Part Number: ATTINY26-16PI
• Description: IC AVR MCU 2K 16MHZ IND 20-DIP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY26-16PI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• 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): 4.5 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Parallel
Programming
Enter Programming
Mode
Considerations for
Efficient Programming
112
ATtiny26(L)
The following algorithm puts the device in parallel programming mode:
Step 2-7 must be completed within 64ms.
1. Set Prog_enable pins listed in Table 55 on page 110, RESET and Vcc to 0V.
2. Apply 4.5 - 5.5V between Vcc/AVcc and GND.
3. Wait at least 60us.
4. Apply between 4.5V - 5.5V (Same as on Vcc/AVcc) to RESET pin.
5. Wait at least 20us.
6. Apply between 11.5V - 12.5V to RESET pin.
7. Wait at least 10us.
8. Program fuses to internal clock mode, 8 MHz, with 64ms delay. (CKSEL[3..0] = 0100,
9. Exit Programming mode by power the device down or by bringing RESET pin to 0V.
10. Repeat step 1 to 7 too re-enter programming mode.
The loaded command and address are retained in the device during programming. For efficient
programming, the following should be considered.
•
•
•
SUT[1..0] = 10). If Lock bits are programmed, a Chip Erase command must be executed
before changing the fuses.
The command needs only be loaded once when writing or reading multiple memory
locations.
Skip writing the data value $FF, that is the contents of the entire EEPROM (unless the
EESAVE Fuse is programmed) and Flash after a Chip Erase.
Address high byte needs only be loaded before programming or reading a new 256-word
window in Flash or 256-byte EEPROM. This consideration also applies to Signature bytes
reading.
1477K–AVR–08/10