ATtiny861 Automotive Atmel Corporation, ATtiny861 Automotive Datasheet - Page 123

• Manufacturer Part Number: ATtiny861 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATtiny861 Automotive

• Flash (kbytes): 8 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 16
• Ext Interrupts: 16
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 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 150
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

16.11.6
16.11.7
7753F–AVR–01/11
TCNT1 – Timer/Counter1
TC1H – Timer/Counter1 High Byte
The actual value from the port register will be visible on the port pin, when the Output Compare
Override Enable Bit is cleared.
and their corresponding Output Compare pins.
Table 16-20. Output Compare Override Enable Bits vs. Output Compare Pins
This 8-bit register contains the value of Timer/Counter1.
The Timer/Counter1 is realized as a 10-bit up/down counter with read and write access. Due to
synchronization of the CPU, Timer/Counter1 data written into Timer/Counter1 is delayed by one
and half CPU clock cycles in synchronous mode and at most one CPU clock cycles for asyn-
chronous mode. When a 10-bit accuracy is preferred, special procedures must be followed for
accessing the 10-bit TCNT1 register via the 8-bit AVR data bus. These procedures are
described in section
can be used as an 8-bit Timer/Counter. Note that the Timer/Counter1 always starts counting up
after writing the TCNT1 register.
The temporary Timer/Counter1 register is an 2-bit read/write register.
• Bits 7:2 - Res: Reserved Bits
These bits are reserved bits in the ATtiny261/461/861 and always reads as zero.
• Bits 1:0 - TC19, TC18: Two MSB bits of the 10-bit accesses
If 10-bit accuracy is used, the Timer/Counter1 High Byte Register (TC1H) is used for temporary
storing the MSB bits (TC19, TC18) of the 10-bit accesses. The same TC1H register is shared
between all 10-bit registers within the Timer/Counter1. Note that special procedures must be fol-
lowed when accessing the 10-bit TCNT1 register via the 8-bit AVR data bus. These procedures
are described in section
OC1OE0
OC1A
Bit
0x2E (0x4E)
Read/Write
Initial value
Bit
0x25 (0x45)
Read/Write
Initial value
(PB0)
MSB
R/W
OC1OE1
OC1A
R
7
0
7
0
-
“Accessing 10-Bit Registers” on page
(PB1)
“Accessing 10-Bit Registers” on page
R/W
R
6
0
6
0
-
Table 16-20
OC1OE2
OC1B
R/W
ATtiny261/ATtiny461/ATtiny861
R
5
0
5
0
-
(PB2)
R/W
R
4
0
4
0
-
shows the Output Compare Override Enable Bits
OC1OE3
OC1B
R/W
R
3
0
3
0
-
(PB3)
112. Alternatively the Timer/Counter1
R/W
112.
R
0
2
0
2
-
OC1OE4
OC1D
TC19
(PB4)
R/W
R/W
1
0
1
0
TC18
LSB
R/W
R/W
OC1OE5
OC1D
0
0
0
0
(PB5)
TCNT1
TC1H
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