ATtiny40 Atmel Corporation, ATtiny40 Datasheet - Page 121

• Manufacturer Part Number: ATtiny40
• Manufacturer: Atmel Corporation

Specifications of ATtiny40

• Flash (kbytes): 4 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 12 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: Yes
• Max I/o Pins: 18
• Ext Interrupts: 18
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Self Program Memory: NO
• 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: 4
• Input Capture Channels: 1
• Pwm Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

15.13.5
15.13.6
8263A–AVR–08/10
DIDR0 – Digital Input Disable Register 0
PORTCR – Port Control Register
Table 15-6.
• Bits 7:0 – ADC7D:ADC0D: ADC[7:0] Digital Input Disable
When a bit is written logic one, the digital input buffer on the corresponding ADC pin is disabled.
The corresponding PIN register bit will always read as zero when this bit is set. When an analog
signal is applied to the ADC[7:0] pin and the digital input from this pin is not needed, this bit
should be written logic one to reduce power consumption in the digital input buffer.
• Bits 7:4 – ADC11D:ADC8D: ADC[11:8] Digital Input Disable
When a bit is written logic one, the digital input buffer on the corresponding ADC pin is disabled.
The corresponding PIN register bit will always read as zero when this bit is set. When an analog
signal is applied to the ADC[11:8] pin and the digital input from this pin is not needed, this bit
should be written logic one to reduce power consumption in the digital input buffer.
Bit
0x0D
Read/Write
Initial Value
Bit
0x08
Read/Write
Initial Value
ADTS2
1
1
1
ADC Auto Trigger Source Selections (Continued)
ADC11D
ADC7D
R/W
R/W
7
0
7
0
ADC10D
ADC6D
ADTS1
R/W
R/W
6
0
6
0
0
1
1
ADC5D
ADC9D
R/W
R/W
5
0
5
0
ADC4D
ADC8D
R/W
R/W
ADTS0
4
0
4
0
1
0
1
ADC3D
R/W
R
3
0
3
–
0
Trigger Source
Timer/Counter1 Compare Match B
Timer/Counter1 Overflow
Timer/Counter1 Capture Event
ADC2D
BBMC
R/W
R/W
2
0
2
0
ADC1D
BBMB
R/W
R/W
1
0
1
0
ADC0D
BBMA
R/W
R/W
0
0
0
0
PORTCR
DIDR0
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