ATtiny85 Atmel Corporation, ATtiny85 Datasheet - Page 66

• Manufacturer Part Number: ATtiny85
• Manufacturer: Atmel Corporation

Specifications of ATtiny85

• Flash (kbytes): 8 Kbytes
• Pin Count: 8
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 3
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 6
• Ext Interrupts: 6
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 4
• 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: 5
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

10.4
10.4.1
10.4.2
10.4.3
10.4.4
66
Register Description
ATtiny25/45/85
MCUCR – MCU Control Register
PORTB – Port B Data Register
DDRB – Port B Data Direction Register
PINB – Port B Input Pins Address
• Bit 6 – PUD: Pull-up Disable
When this bit is written to one, the pull-ups in the I/O ports are disabled even if the DDxn and
PORTxn Registers are configured to enable the pull-ups ({DDxn, PORTxn} = 0b01). See
figuring the Pin” on page 56
Bit
0x35
Read/Write
Initial Value
Bit
0x18
Read/Write
Initial Value
Bit
0x17
Read/Write
Initial Value
Bit
0x16
Read/Write
Initial Value
BODS
R
7
0
R
R
R
7
–
0
7
–
0
7
–
0
PUD
R/W
R
R
R
6
0
6
–
0
6
–
0
6
–
0
for more details about this feature.
PORTB5
PINB5
DDB5
R/W
R/W
R/W
N/A
R/W
5
0
5
0
SE
5
5
0
PORTB4
DDB4
PINB4
R/W
R/W
R/W
N/A
4
0
4
0
4
SM1
R/W
4
0
PORTB3
PINB3
DDB3
R/W
R/W
R/W
N/A
3
0
3
0
3
SM0
R/W
3
0
PORTB2
PINB2
DDB2
R/W
R/W
BODSE
R/W
N/A
2
0
2
0
2
R
2
0
PORTB1
DDB1
PINB1
R/W
R/W
R/W
ISC01
N/A
R/W
1
0
1
0
1
1
0
PORTB0
PINB0
DDB0
ISC00
R/W
R/W
R/W
R/W
N/A
0
0
0
0
0
0
0
2586N–AVR–04/11
MCUCR
PORTB
DDRB
PINB
“Con-