ATtiny5 Atmel Corporation, ATtiny5 Datasheet - Page 83

• Manufacturer Part Number: ATtiny5
• Manufacturer: Atmel Corporation

Specifications of ATtiny5

• Flash (kbytes): 0.5 Kbytes
• Pin Count: 6
• Max. Operating Frequency: 12 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 1
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 4
• Ext Interrupts: 4
• Usb Speed: No
• Usb Interface: No
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 4
• Adc Resolution (bits): 8
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.03
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 1
• Output Compare Channels: 2
• Input Capture Channels: 1
• Pwm Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

12.1.2
8127E–AVR–11/11
DIDR0 – Digital Input Disable Register 0
• Bit 4 – ACI: Analog Comparator Interrupt Flag
This bit is set by hardware when a comparator output event triggers the interrupt mode defined
by ACIS1 and ACIS0. The analog comparator interrupt routine is executed if the ACIE bit is set
and the I-bit in SREG is set. ACI is cleared by hardware when executing the corresponding inter-
rupt handling vector. Alternatively, ACI is cleared by writing a logic one to the flag.
• Bit 3 – ACIE: Analog Comparator Interrupt Enable
When the ACIE bit is written logic one, the Analog Comparator interrupt request is enabled.
When written logic zero, the interrupt request is disabled.
• Bit 2 – ACIC: Analog Comparator Input Capture Enable
When set, this bit enables the input capture function in Timer/Counter0 to be triggered by the
analog comparator. In this case, the comparator output is directly connected to the input capture
front-end logic, using the noise canceler and edge select features of the Timer/Counter0 input
capture interrupt. To make the comparator trigger the Timer/Counter0 input capture interrupt,
the ICIE0 bit in “TIMSK0 – Timer/Counter Interrupt Mask Register 0” must be set.
When this bit is cleared, no connection between the analog comparator and the input capture
function exists.
• Bits 1:0 – ACIS1, ACIS0: Analog Comparator Interrupt Mode Select
These bits determine which comparator events that trigger the analog comparator interrupt. The
different settings are shown in
Table 12-1.
When changing the ACIS1/ACIS0 bits, the analog comparator Interrupt must be disabled by
clearing its Interrupt Enable bit in “ACSR – Analog Comparator Control and Status Register”.
Otherwise an interrupt can occur when the bits are changed.
• Bits 1:0 – ADC1D, ADC0D: Digital Input Disable
When this bit is set, the digital input buffer on pin AIN1 (ADC1) / AIN0 (ADC0) is disabled and
the corresponding PIN register bit will read as zero. When used as an analog input but not
required as a digital input the power consumption in the digital input buffer can be reduced by
writing this bit to logic one.
Bit
0x17
Read/Write
Initial Value
ACIS1
0
0
1
1
Selecting Source for Analog Comparator Interrupt.
R
7
–
0
ACIS0
0
1
0
1
R
6
–
0
Interrupt Mode
Comparator Interrupt on Output Toggle.
Reserved
Comparator Interrupt on Falling Output Edge.
Comparator Interrupt on Rising Output Edge.
Table
R
5
–
0
12-1.
4
–
R
0
ADC3D
R/W
3
0
ADC2D
R/W
2
0
ADC1D
R/W
1
0
ATtiny4/5/9/10
ADC0D
R/W
0
0
DIDR0
83