ATMEGA32M1-AU Atmel, ATMEGA32M1-AU Datasheet - Page 231
![MPU AVR 32K FLASH 20MHZ 32TQFP](/photos/6/91/69154/313-32-tqfp_sml.jpg)
ATMEGA32M1-AU
Manufacturer Part Number
ATMEGA32M1-AU
Description
MPU AVR 32K FLASH 20MHZ 32TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA32M1-AU
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
CAN, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
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)
2.7 V ~ 5.5 V
Data Converters
A/D 11x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-TQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of I /o
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA32M1-AU
Manufacturer:
TYCO
Quantity:
210
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21.6.2
8209D–AVR–11/10
Analog Noise Canceling Techniques
to remove high frequency components with a low-pass filter before applying the signals as
inputs to the ADC.
Figure 21-8. Analog Input Circuitry
Digital circuitry inside and outside the device generates EMI which might affect the accuracy of
analog measurements. If conversion accuracy is critical, the noise level can be reduced by
applying the following techniques:
Figure 21-9. ADC Power Connections
1. Keep analog signal paths as short as possible. Make sure analog tracks run over the
2. The AV
3. Use the ADC noise canceler function to reduce induced noise from the CPU
4. If any ADC port pins are used as digital outputs, it is essential that these do not switch
(ACMPN3/ADC0) PE2
analog ground plane, and keep them well away from high-speed switching digital tracks
LC network as shown in
while a conversion is in progress
CC
(ADC1) PD4
pin on the device should be connected to the digital V
GND
VCC
ADCn
Figure 21-9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
I
IH
I
IL
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
ATmega16M1/32M1/64M1
1..100 kΩ
PB7(ADC4)
PB6 (ADC7)
PB5 (ADC6/ACMPN1/AMP2-)
PC7 (D2A/AMP2+)
PB4 (AMP0+)
PB3 (AMP0-)
PC6 (ADC10/ACMP1)
AREF (ISRC)
AGND
AVCC
PC5 (ADC9/ACMP3/AMP1+)
PC4 (ADC8/AMP1-)
PB2 (ADC5/ACMPN0)
PD7 (ACMP0)
PD6 (ADC3/ACMPN2)
PD5 (ADC2/ACMP2)
Analog Ground Plane
C
S/H
= 14 pF
CC
V
CC
supply voltage via an
/2
100nF
231
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