ATMEGA32U4-MU Atmel, ATMEGA32U4-MU Datasheet - Page 310
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ATMEGA32U4-MU
Manufacturer Part Number
ATMEGA32U4-MU
Description
MCU AVR 32K FLASH 16MHZ 44-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA32U4-MU
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI, UART/USART, USB
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
26
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2.5K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-VQFN
Package
44QFN EP
Device Core
AVR
Family Name
ATmega
Maximum Speed
16 MHz
Operating Supply Voltage
3.3|5 V
Data Bus Width
8 Bit
Number Of Programmable I/os
26
Interface Type
EBI/I2S/SPI/TWI/USART/USB
On-chip Adc
12-chx10-bit
Number Of Timers
5
For Use With
ATSTK524 - KIT STARTER ATMEGA32M1/MEGA32C1ATSTK600 - DEV KIT FOR AVR/AVR32ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ATMEGA32U4-16MU
ATMEGA32U4-16MU
ATMEGA32U4-16MU
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA32U4-MUR
Manufacturer:
UCC
Quantity:
1 001
- Current page: 310 of 433
- Download datasheet (9Mb)
24.9.2
7766F–AVR–11/10
ADC Control and Status Register A – ADCSRA
Table 24-4.
Note:
• Bit 7 – ADEN: ADC Enable
Writing this bit to one enables the ADC. By writing it 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
In Single Conversion mode, write this bit to one to start each conversion. In Free Running mode,
write this bit to one to start the first conversion. The first conversion after ADSC has been written
after the ADC has been enabled, or if ADSC is written at the same time as the ADC is enabled,
will take 25 ADC clock cycles instead of the normal 13. This first conversion performs initializa-
tion of the ADC.
ADSC will read as one as long as a conversion is in progress. When the conversion is complete,
it returns to zero. Writing zero to this bit has no effect.
• Bit 5 – ADATE: ADC Auto Trigger Enable
When this bit is written to one, Auto Triggering of the ADC is enabled. The ADC will start a con-
version on a positive edge of the selected trigger signal. The trigger source is selected by setting
the ADC Trigger Select bits, ADTS in ADCSRB.
• Bit 4 – ADIF: ADC Interrupt Flag
This bit is set when an ADC conversion completes and the Data Registers are updated. The
ADC Conversion Complete Interrupt is executed if the ADIE bit and the I-bit in SREG are set.
ADIF is cleared by hardware when executing the corresponding interrupt handling vector. Alter-
natively, ADIF is cleared by writing a logical one to the flag. Beware that if doing a Read-Modify-
Bit
Read/Write
Initial Value
MUX5..0
110100
110101
110110
110111
111000
111001
111010
111011
111100
111101
111110
111111
1. MUX5 bit make part of ADCSRB register
(1)
Single Ended Input
N/A
ADEN
R/W
Input Channel and Gain Selections (Continued)
7
0
ADSC
R/W
6
0
ADATE
R/W
5
0
Positive Differential Input
ADC4
ADC5
ADC6
ADC7
ADC4
ADC5
ADC6
ADC7
ADC4
ADC5
ADC6
ADC7
ADIF
R/W
4
0
ADIE
R/W
3
0
ADPS2
R/W
2
0
ADPS1
Negative Differential Input
ADC1
ADC1
ADC1
ADC1
ADC0
ADC0
ADC0
ADC0
ADC1
ADC1
ADC1
ADC1
R/W
1
0
ATmega16/32U4
ADPS0
R/W
0
0
ADCSRA
Gain
40x
40x
40x
40x
200x
200x
200x
200x
200x
200x
200x
200x
310
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