ATtiny85 Atmel Corporation, ATtiny85 Datasheet - Page 93

• 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

12.3.2
2586N–AVR–04/11
GTCCR – General Timer/Counter1 Control Register
Table 12-5.
The Stop condition provides a Timer Enable/Disable function.
• Bit 6 – PWM1B: Pulse Width Modulator B Enable
When set (one) this bit enables PWM mode based on comparator OCR1B in Timer/Counter1
and the counter value is reset to $00 in the CPU clock cycle after a compare match with OCR1C
register value.
• Bits 5:4 – COM1B[1:0]: Comparator B Output Mode, Bits 1 and 0
The COM1B1 and COM1B0 control bits determine any output pin action following a compare
match with compare register B in Timer/Counter1. Since the output pin action is an alternative
function to an I/O port, the corresponding direction control bit must be set (one) in order to con-
trol an output pin.
In Normal mode, the COM1B1 and COM1B0 control bits determine the output pin actions that
affect pin PB4 (OC1B) as described in
mode.
Table 12-6.
Bit
0x2C
Read/Write
Initial value
COM1B1
CS13
0
0
1
1
0
0
0
0
1
1
1
1
1
1
1
1
Timer/Counter1 Prescale Select (Continued)
TSM
Comparator B Mode Select in Normal Mode
R/W
COM1B0
7
0
0
1
0
1
CS12
1
1
1
1
0
0
0
0
1
1
1
1
PWM1B
R/W
6
0
Description
Timer/Counter Comparator B disconnected from output pin OC1B.
Toggle the OC1B output line.
Clear the OC1B output line.
Set the OC1B output line
COM1B1
CS11
R/W
0
0
1
1
0
0
1
1
0
0
1
1
5
0
Table
COM1B0
R/W
4
0
12-6. Note that OC1B is not connected in normal
CS10
0
1
0
1
0
1
0
1
0
1
0
1
FOC1B
W
3
0
Asynchronous
Clocking Mode
PCK/8
PCK/16
PCK/32
PCK/64
PCK/128
PCK/256
PCK/512
PCK/1024
PCK/2048
PCK/4096
PCK/8192
PCK/16384
FOC1A
W
2
0
ATtiny25/45/85
PSR1
R/W
1
0
Synchronous
Clocking Mode
CK/8
CK/16
CK/32
CK/64
CK/128
CK/256
CK/512
CK/1024
CK/2048
CK/4096
CK/8192
CK/16384
PSR0
R/W
0
0
GTCCR
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