ATTINY461-20SUR Atmel, ATTINY461-20SUR Datasheet - Page 182

• Manufacturer Part Number: ATTINY461-20SUR
• Description: MCU AVR 4KB FLASH 20MHZ 20SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY461-20SUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• 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 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

18.7.6
182
ATtiny261/461/861
Programming the EEPROM
Figure 18-4. Addressing the Flash Which is Organized in Pages
Note:
In the figure below, “XX” means don’t care. The numbers in the figure refer to the programming
description above.
WR
Figure 18-5. Flash Programming Waveforms
The EEPROM is organized in pages, see
EEPROM, the program data is latched into a page buffer. This allows one page of data to be
STEP
DATA
XA1 / BS2
XA0
PAGEL / BS1
XTAL1
WR
RDY / BSY
RESET +12V
OE
PROGRAM MEMORY
PCPAGE and PCWORD are listed in
PROGRAM
COUNTER
PAGE
0x10
1
PAGE ADDRESS
WITHIN THE FLASH
ADDR. LOW
PCMSB
2
PCPAGE
DATA LOW
3
DATA HIGH
4
ADDR. LOW
PAGEMSB
Table 18-7 on page
2
PCWORD
Table 18-8 on page
DATA LOW
WORD ADDRESS
WITHIN A PAGE
8
5
3
DATA HIGH
INSTRUCTION WORD
4
173.
ADDR. HIGH
PAGE
6
173. When programming the
XXX
7
PCWORD[PAGEMSB:0]:
00
01
02
PAGEEND
2588E–AVR–08/10
0x00
9