AT90PWM1 Atmel Corporation, AT90PWM1 Datasheet - Page 195
AT90PWM1
Manufacturer Part Number
AT90PWM1
Description
Manufacturer
Atmel Corporation
Specifications of AT90PWM1
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
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
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
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20 000
Part Number:
AT90PWM161-16MN
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19.8.2
4378C–AVR–09/08
ADC Control and Status Register A – ADCSRA
• Bit 3, 2, 1, 0 – MUX3, MUX2, MUX1, MUX0: ADC Channel Selection Bits
These 4 bits determine which analog inputs are connected to the ADC input. The different set-
ting are shown in
Table 63. ADC Input Channel Selection
If these bits are changed during a conversion, the change will not take effect until this conversion
is complete (it means while the ADIF bit in ADCSRA register is set).
Bit
Read/Write
Initial Value
• Bit 7 – ADEN: ADC Enable Bit
Set this bit to enable the ADC.
Clear this bit to disable the ADC.
Clearing this bit while a conversion is running will take effect at the end of the conversion.
• Bit 6– ADSC: ADC Start Conversion Bit
Set this bit to start a conversion in single conversion mode or to start the first conversion in free
running mode.
Cleared by hardware when the conversion is complete. Writing this bit to zero has no effect.
The first conversion performs the initialization of the ADC.
In order to start a conversion on an amplified channel with the AT90PWM1, use the ADCS bit in
ADCSRA register.
MUX3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
MUX2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
ADEN
R/W
7
0
Table
63.
ADSC
R/W
6
0
MUX1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
ADATE
R/W
5
0
ADIF
R
MUX0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
4
0
ADIE
R/W
3
0
Description
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
Reserved
Reserved
Reserved
AMP0
Reserved
Reserved
Bandgap
GND
ADPS2
R/W
2
0
ADPS1
R/W
1
0
AT90PWM1
ADPS0
R/W
0
0
ADCSRA
195
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