ATMEGA325A-MU Atmel, ATMEGA325A-MU Datasheet - Page 248
ATMEGA325A-MU
Manufacturer Part Number
ATMEGA325A-MU
Description
IC MCU AVR 32K FLASH 64VQFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA325A-MU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
54
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-VFQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 248 of 680
- Download datasheet (37Mb)
24.5.5
Table 24-3.
248
Signal Name
COMP
ACLK
ACTEN
ADCBGEN
ADCEN
AMPEN
ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/645
Scanning the ADC
Boundary-scan Signals for the ADC
Direction as seen
from the ADC
Output
Input
Input
Input
Input
Input
Figure 24-9 on page 248
observe signals. The Boundary-scan cell from
these signals. The ADC need not be used for pure connectivity testing, since all analog inputs
are shared with a digital port pin as well.
Figure 24-9. Analog to Digital Converter
The signals are described briefly in
NEGSEL_2
NEGSEL_1
NEGSEL_0
MUXEN_7
MUXEN_6
MUXEN_5
MUXEN_4
MUXEN_3
MUXEN_2
MUXEN_1
MUXEN_0
EXTCH
ADC_7
ADC_6
ADC_5
ADC_4
ADC_3
ADC_2
ADC_1
ADC_0
Description
Comparator Output
Clock signal to differential amplifier
implemented as Switch-cap filters
Enable path from differential
amplifier to the comparator
Enable Band-gap reference as
negative input to comparator
Power-on signal to the ADC
Power-on signal to the differential
amplifier
ADC_2
ADC_1
ADC_0
SCTEST
AMPEN
ACLK
(1)
ST
To Comparator
shows a block diagram of the ADC with all relevant control and
+
-
1x
Table 24-3 on page
ADCBGEN
VCCREN
IREFEN
AREF
PASSEN
Recommended
Input when not
in Use
ACTEN
1.22V
GNDEN
ref
Figure 24-5 on page 245
1.11V
ref
0
0
0
0
0
0
248.
PRECH
DAC_9..0
ADCEN
HOLD
Output Values when
recommended inputs are Used,
and CPU is not Using the ADC
PRECH
AREF
10-bit DAC
is attached to each of
AREF
0
0
0
0
0
0
+
-
8285B–AVR–03/11
DACOUT
COMP
COMP
Related parts for ATMEGA325A-MU
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
IC AVR MCU 32K 16MHZ 5V 44-QFN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC AVR MCU 32K 16MHZ 5V 40DIP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC AVR MCU 32K 16MHZ 5V 44TQFP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC AVR MCU 32K 16MHZ IND 40-DIP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC AVR MCU 32K 16MHZ IND 44-TQFP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
MCU AVR 32KB FLASH 16MHZ 44TQFP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
MCU AVR 32KB FLASH 16MHZ 44QFN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
MCU AVR 32K FLASH 16MHZ 44-TQFP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC AVR MCU 32K 16MHZ COM 40-DIP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC AVR MCU 32K 16MHZ COM 44-QFN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC AVR MCU 32K 16MHZ COM 44-TQFP
Manufacturer:
Atmel
Datasheet: