ATtiny84 Atmel Corporation, ATtiny84 Datasheet - Page 170

• Manufacturer Part Number: ATtiny84
• Manufacturer: Atmel Corporation

Specifications of ATtiny84

• Flash (kbytes): 8 Kbytes
• Pin Count: 14
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 6
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 12
• Ext Interrupts: 12
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

19.7.5
170
ATtiny24/44/84
Programming the EEPROM
Figure 19-4. Addressing the Flash which is Organized in Pages
Figure 19-5. High-voltage Serial Programming Waveforms
The EEPROM is organized in pages, see
EEPROM, the data is latched into a page buffer. This allows one page of data to be pro-
grammed simultaneously. The programming algorithm for the EEPROM Data memory is as
follows (refer to
SDO
PB0
PB1
PB2
PB3
1. Load Command “Write EEPROM”.
2. Load EEPROM Page Buffer.
3. Program EEPROM Page. Wait after Instr. 2 until SDO goes high for the “Page Program-
4. Repeat 2 through 3 until the entire EEPROM is programmed or until all data has been
5. End Page Programming by Loading Command “No Operation”.
SDI
SCI
SII
ming” cycle to finish.
programmed.
PROGRAM MEMORY
PROGRAM
COUNTER
PAGE
0
MSB
Table 19-16 on page
PAGE ADDRESS
WITHIN THE FLASH
MSB
MSB
1
PCMSB
2
PCPAGE
3
171):
4
PAGEMSB
PCWORD
Table 20-12 on page
5
WORD ADDRESS
WITHIN A PAGE
6
INSTRUCTION WORD
7
PAGE
LSB
LSB
LSB
8
183. When programming the
9
PCWORD[PAGEMSB:0]:
00
01
02
PAGEEND
10
8006K–AVR–10/10