ATTINY461-20PU Atmel, ATTINY461-20PU Datasheet - Page 173

• Manufacturer Part Number: ATTINY461-20PU
• Description: Microcontrollers (MCU) 4kB Flash 0.256kB EEPROM 16 I/O Pins
• Manufacturer: Atmel

Specifications of ATTINY461-20PU

• Processor Series: ATTINY4x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: 2-Wire/SPI/USI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 2
• Operating Supply Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 11-ch x 10-bit
• Program Memory Type: Flash
• Program Memory Size: 4 KB
• Package / Case: PDIP-20
• Package: 20PDIP
• Device Core: AVR
• Family Name: ATtiny
• Maximum Speed: 20 MHz
• Ram Size: 256 Byte
• Operating Temperature: -40 to 85 °C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

18.4
18.5
18.6
2588E–AVR–08/10
Calibration Byte
Page Size
Serial Programming
Signature area of the ATtiny261/461/861 has one byte of calibration data for the internal RC
Oscillator. This byte resides in the high byte of address 0x000. During reset, this byte is auto-
matically written into the OSCCAL Register to ensure correct frequency of the calibrated RC
Oscillator.
Table 18-7.
Table 18-8.
Both the Flash and EEPROM memory arrays can be programmed using the serial SPI bus while
RESET is pulled to GND. The serial interface consists of pins SCK, MOSI (input) and MISO (out-
put). See
Figure 18-1. Serial Programming and Verify
Note:
ATtiny261
ATtiny461
ATtiny861
ATtiny261
ATtiny461
ATtiny861
Device
Device
If the device is clocked by the internal Oscillator, there is no need to connect a clock source to the
CLKI pin.
Figure
1K words (2K bytes)
2K words (4K bytes)
4K words (8K bytes)
No. of Words in a Page and No. of Pages in the Flash
No. of Words in a Page and No. of Pages in the EEPROM
EEPROM
128 bytes
256 bytes
512 bytes
18-1.
Size
Flash Size
MOSI
MISO
SCK
Page Size
4 bytes
4 bytes
4 bytes
Page Size
16 words
32 words
32 words
RESET
GND
PCWORD
EEA[1:0]
EEA[1:0]
EEA[1:0]
PCWORD
PC[3:0]
PC[4:0]
PC[4:0]
VCC
No. of Pages
128
+1.8 - 5.5V
32
64
No. of Pages
128
64
64
PCPAGE
EEA[6:2]
EEA[7:2]
EEA[8:2]
PCPAGE
PC[10:5]
PC[11:5]
PC[9:4]
EEAMSB
PCMSB
6
7
8
10
11
9
173