ATTINY85-20SU Atmel, ATTINY85-20SU Datasheet - Page 66

• Manufacturer Part Number: ATTINY85-20SU
• Description: IC AVR MCU 8K 20MHZ 8SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY85-20SU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 6
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
• Processor Series: ATTINY8x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: USI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 6
• Number Of Timers: 2
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 4-ch x 10-bit
• For Use With: ATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIPATAVRBC100 - REF DESIGN KIT BATTERY CHARGER770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPIATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
2586M–AVR–07/10
MCUCR
PORTB
DDRB
PINB
“Con-