ATmega64M1 Atmel Corporation, ATmega64M1 Datasheet - Page 252

• Manufacturer Part Number: ATmega64M1
• Manufacturer: Atmel Corporation

Specifications of ATmega64M1

• Flash (kbytes): 64 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 27
• Ext Interrupts: 27
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Uart: 1
• Can: 1
• Lin: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 125
• Analog Comparators: 4
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 14
• Input Capture Channels: 1
• Pwm Channels: 10
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

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)
)
)