ATtiny48 Atmel Corporation, ATtiny48 Datasheet - Page 85

• Manufacturer Part Number: ATtiny48
• Manufacturer: Atmel Corporation

Specifications of ATtiny48

• Flash (kbytes): 4 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 12 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 28
• Ext Interrupts: 28
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• 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
• Eeprom (bytes): 64
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• 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

11.8
11.8.1
8008H–AVR–04/11
8-bit Timer/Counter Register Description
TCCR0A – Timer/Counter Control Register A
Figure 11-7. Timer/Counter Timing Diagram, Setting of OCF0x, with Prescaler (f
Figure 11-8
is TOP.
Figure 11-8. Timer/Counter Timing Diagram, Clear Timer on Compare Match mode, with Pres-
• Bits 7:4 – Res: Reserved Bits
These bits are reserved and will always read zero.
• Bit 3 – CTC0: Clear Timer on Compare Match Mode
This bit control the counting sequence of the counter, the source for maximum (TOP) counter
value, see
mode (counter), Clear Timer on Compare Match (CTC) mode (see
page
Bit
0x25 (0x45)
Read/Write
Initial Value
TCNTn
TCNTn
(clk
(clk
OCRnx
OCRnx
83).
OCFnx
(CTC)
OCFnx
clk
clk
clk
clk
I/O
I/O
I/O
Tn
I/O
Tn
/8)
/8)
Table
shows the setting of OCF0A and the clearing of TCNT0 in CTC mode where OCR0A
caler (f
7
R
0
–
11-2. Modes of operation supported by the Timer/Counter unit are: Normal
clk_I/O
OCRnx - 1
TOP - 1
/8)
R
6
0
–
R
5
–
0
OCRnx
TOP
R
4
–
0
OCRnx Value
TOP
CTC0
R/W
3
0
OCRnx + 1
BOTTOM
CS02
R/W
2
0
“Modes of Operation” on
CS01
R/W
1
0
ATtiny48/88
BOTTOM + 1
CS00
OCRnx + 2
R/W
0
0
clk_I/O
/8)
TCCR0A
85