ATtiny87 Atmel Corporation, ATtiny87 Datasheet - Page 226
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ATtiny87
Manufacturer Part Number
ATtiny87
Description
Manufacturer
Atmel Corporation
Specifications of ATtiny87
Flash (kbytes)
8 Kbytes
Pin Count
20
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
16
Ext Interrupts
16
Usb Speed
No
Usb Interface
No
Spi
2
Twi (i2c)
1
Uart
1
Lin
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
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
3
Input Capture Channels
1
Pwm Channels
9
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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ATtiny87/ATtiny167
Note that the fuses are read as logical zero, “0”, if they are programmed.
Table 21-3.
Table 21-4.
Notes:
Fuse Extended Byte
–
–
–
–
–
–
–
SELFPRGEN
Fuse High Byte
RSTDISBL
DWEN
SPIEN
WDTON
EESAVE
BODLEVEL2
BODLEVEL1
BODLEVEL0
(2)
(3)
1.
2. The SPIEN Fuse is not accessible in serial programming mode.
3.
4. See
(1)
See ”Alternate Functions of Port B” on page 81.
See ”WDTCR – Watchdog Timer Control Register” on page 57.
(4)
(4)
(4)
Extended Fuse Byte
Fuse High Byte
Table 22-5 on page 247
Bit No Description
7
6
5
4
3
2
1
0
Bit No
External Reset Disable
DebugWIRE Enable
Enable Serial Program
and Data Downloading
Watchdog Timer always on
EEPROM memory is preserved
through the Chip Erase
Brown-out Detector trigger level 1 (unprogrammed)
Brown-out Detector trigger level 1 (unprogrammed)
Brown-out Detector trigger level 1 (unprogrammed)
7
6
5
4
3
2
1
0
Description
–
–
–
–
–
–
–
Self Programming Enable
for BODLEVEL Fuse coding.
for description of RSTDISBL Fuse.
Default Value
1 (unprogrammed)
1 (unprogrammed)
0 (programmed,
1 (unprogrammed)
1 (unprogrammed,
SPI programming enabled)
EEPROM not preserved)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
Default Value
1 (unprogrammed)
for details.
8265B–AVR–09/10
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