atmega103 ATMEL Corporation, atmega103 Datasheet - Page 80
atmega103
Manufacturer Part Number
atmega103
Description
Atmega103 8-bit With 128k Bytes Of In-system Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.ATMEGA103.pdf
(141 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
atmega103-6AC
Manufacturer:
ATMEL
Quantity:
1
Company:
Part Number:
atmega103-6AI
Manufacturer:
ATMEL
Quantity:
586
- Current page: 80 of 141
- Download datasheet (3Mb)
ADC Noise Canceler
Function
ADC Multiplexer Select
Register – ADMUX
ADC Control and Status
Register – ADCSR
80
ATmega103(L)
The ADC features a noise canceler that enables conversion during Idle mode to reduce
noise induced from the CPU core. To make use of this feature, the following procedure
should be used:
1. Turn off the ADC by clearing ADEN.
2. Turn on the ADC and simultaneously start a conversion by setting ADEN and
3. Within 14 ADC clock cycles, enter Idle mode.
4. If no other interrupts occur before the ADC conversion completes, the ADC inter-
• Bits 7..3 – Res: Reserved Bits
These bits are reserved bits in the ATmega103(L) and always read as zero.
• Bits 2..0 – MUX2..MUX0: Analog Channel Select Bits 2 - 0
The value of these three bits selects which analog input 7 - 0 is connected to the ADC.
• Bit 7 – ADEN: ADC Enable
Writing a logical “1” to this bit enables the ADC. By clearing this bit to zero, the ADC is
turned off. Turning the ADC off while a conversion is in progress will terminate this
conversion.
• Bit 6 – ADSC: ADC Start Conversion
A logical “1” must be written to this bit to start each conversion. The first time ADSC has
been written after the ADC has been enabled, or if ADSC is written at the same time as
the ADC is enabled, a dummy conversion will precede the initiated conversion. This
dummy conversion performs initialization of the ADC.
ADSC remains high during the conversion. ADSC goes low after the conversion is com-
plete, but before the result is written to the ADC Data Registers. This allows a new
conversion to be initiated before the current conversion is complete. The new conver-
sion will then start immediately after the current conversion completes. When a dummy
conversion precedes a real conversion, ADSC will stay high until the real conversion
completes.
Writing a zero to this bit has no effect.
Bit
$07 ($27)
Read/Write
Initial Value
Bit
$06 ($26)
Read/Write
Initial Value
ADSC. This starts a dummy conversion that will be followed by a valid
conversion.
rupt will wake up the MCU and execute the ADC conversion complete interrupt
routine.
ADEN
R/W
R
7
–
0
7
0
ADSC
R/W
R
6
–
0
6
0
R
5
–
0
R
5
–
0
ADIF
R/W
R
4
–
0
4
0
ADIE
R/W
R
3
–
0
3
0
MUX2
ADPS2
R/W
R/W
2
0
2
0
MUX1
R/W
ADPS1
1
0
R/W
1
0
MUX0
R/W
ADPS0
0
0
R/W
0
0
0945I–AVR–02/07
ADMUX
ADCSR
Related parts for atmega103
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
U6046BREAR WINDOW HEATING TIMER / LONG-TERM TIMER
Manufacturer:
ATMEL Corporation
Datasheet: