AT90PWM2B Atmel Corporation, AT90PWM2B Datasheet - Page 122
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AT90PWM2B
Manufacturer Part Number
AT90PWM2B
Description
Manufacturer
Atmel Corporation
Specifications of AT90PWM2B
Flash (kbytes)
8 Kbytes
Pin Count
24
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
8
Hardware Qtouch Acquisition
No
Max I/o Pins
19
Ext Interrupts
4
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
2
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
No
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 105
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
4
Output Compare Channels
12
Input Capture Channels
1
Pwm Channels
7
32khz Rtc
No
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT90PWM2B-16SU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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15.10 16-bit Timer/Counter Register Description
15.10.1
122
AT90PWM2/3/2B/3B
Timer/Counter1 Control Register A – TCCR1A
Figure 15-12. Timer/Counter Timing Diagram, no Prescaling
Figure 15-13
Figure 15-13. Timer/Counter Timing Diagram, with Prescaler (f
• Bit 7:6 – COMnA1:0: Compare Output Mode for Channel A
• Bit 5:4 – COMnB1:0: Compare Output Mode for Channel B
The COMnA1:0 and COMnB1:0 control the Output Compare pins (OCnA and OCnB respec-
tively) behavior. If one or both of the COMnA1:0 bits are written to one, the OCnA output
overrides the normal port functionality of the I/O pin it is connected to. If one or both of the
COMnB1:0 bit are written to one, the OCnB output overrides the normal port functionality of the
Bit
Read/Write
Initial Value
and ICF n
(PC and PFC PWM)
and ICFn
(CTC and FPWM)
TOVn
(Update at TOP)
(PC and PFC PWM)
TOVn
(CTC and FPWM)
(Update at TOP)
TCNTn
TCNTn
OCRnx
as TOP)
(clk
TCNTn
TCNTn
OCRnx
(clk
as TOP)
clk
clk
clk
clk
I/O
(FPWM)
I/O
shows the same timing data, but with the prescaler enabled.
(FPWM)
I/O
Tn
I/O
Tn
/8)
COM1A1
(if used
/1)
(if used
R/W
7
0
COM1A0
R/W
6
0
TOP - 1
TOP - 1
TOP - 1
TOP - 1
Old OCRnx Value
Old OCRnx Value
COM1B1
R/W
5
0
COM1B0
R/W
4
0
TOP
TOP
TOP
TOP
R
3
–
0
BOTTOM
BOTTOM
TOP - 1
TOP - 1
clk_I/O
R
2
0
–
New OCRnx Value
New OCRnx Value
/8)
WGM11
R/W
1
0
BOTTOM + 1
BOTTOM + 1
TOP - 2
TOP - 2
WGM10
R/W
0
0
4317J–AVR–08/10
TCCR1A
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