ATtiny167 Atmel Corporation, ATtiny167 Datasheet - Page 190

• Manufacturer Part Number: ATtiny167
• Manufacturer: Atmel Corporation

Specifications of ATtiny167

• Flash (kbytes): 16 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: 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

16.2.2
16.2.3
16.2.4
16.3
16.3.1
190
Control Register
ATtiny87/ATtiny167
Current Source for Low Cost Transducer
Voltage Reference for External Devices
Threshold Reference for Internal Analog Comparator
AMISCR – Analog Miscellaneous Control Register
An external transducer based on a variable resistor can be connected to the Current Source.
This can be, for instance:
Using the Current Source with this type of transducer eliminates the need for additional parts
otherwise required in resistor network or Wheatstone bridge.
An external resistor used in conjunction with the Current Source can be used as voltage refer-
ence for external devices. Using a resistor in serie with a lower tolerance than the Current
Source accuracy (≤2%) is recommended.
using standard values of resistors.
An external resistor used in conjunction with the Current Source can be used as threshold ref-
erence for internal Analog Comparator
This can be connected to AIN0 (negative Analog Compare input pin) as well as AIN1 (positive
Analog Compare input pin). Using a resistor in serie with a lower tolerance than the Current
Source accuracy (≤2%) is recommended.
ences using standard values of resistors.
• Bit 0 – ISRCEN: Current Source Enable
Writing this bit to one enables the Current Source as shown in
to use DIDR register bit function when ISRCEN is set. It also recommended to turn off the Cur-
rent Source as soon as possible ( ex: once the ADC measurement is done).
Bit
(0x77)
Read/Write
Initial Value
• A thermistor, or temperature-sensitive resistor, used as a temperature sensor,
• A CdS photoconductive cell, or luminosity-sensitive resistor, used as a luminosity sensor,
• ...
R
7
–
0
R
6
–
0
R
5
–
0
(See ”AnaComp - Analog Comparator” on page
Table 16-2
R
4
–
0
Table 16-2
R
3
–
0
gives an example of voltage references
gives an example of threshold refer-
AREFEN
R/W
2
0
Figure
XREFEN
R/W
16-1. It is recommended
1
0
ISRCEN
R/W
0
0
8265B–AVR–09/10
AMISCR
211.).