ATMEGA32M1-MU Atmel, ATMEGA32M1-MU Datasheet - Page 252

• Manufacturer Part Number: ATMEGA32M1-MU
• Description: MPU AVR 32K FLASH 20MHZ 32-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA32M1-MU

• 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-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of I /o: -

252
ATmega16M1/32M1/64M1
ATmega16M1/32M1/64M1 proposes to have an external resistor used in conjunction with the
Current Source. The device measures the voltage to the boundaries of the resistance via the
Analog to Digital converter. The resulting voltage defines the physical address that the commu-
nication handler will use when the node will participate in LIN communication.
In automotive applications, distributed voltages are very disturbed. The internal Current Source
solution of ATmega16M1/32M1/64M1 immunizes the address detection against any kind of volt-
age variations.
Table 22-1.
Table 22-2.
Note:
Physical
Address
0
1
2
3
4
5
6
7
Physical
Address
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1. 5V range: Max R
3V range: Max R
Example of Resistor Values(±5%) for a 8-address System (AVcc = 5V
Example of Resistor Values(±1%) for a 16-address System (AVcc = 5V
1 000
2 200
3 300
4 700
6 800
10 000
15 000
22 000
2 000
2 400
2 700
3 300
3 900
4 700
5 600
6 800
8 200
9 100
11 000
13 000
16 000
18 000
20 000
24 000
Resistor Value
Resistor Value
R
R
load
load
(Ohm)
(Ohm)
load
load
30KΩ
15KΩ
Minimum Voltage
Minimum Voltage
Measured (V)
Measured (V)
0.1
0.22
0.33
0.47
0.68
1
1.5
2.2
0.2
0.24
0.27
0.33
0.39
0.47
0.56
0.68
0.82
0.91
1.1
1.3
1.6
1.8
2
2.4
Typical Voltage
Typical Voltage
Measured (V)
Measured (V)
Maximum Voltage
Maximum Voltage
Measured (V)
Measured (V)
8209D–AVR–11/10
(1)
(1)
)
)