ATmega32M1 Automotive Atmel Corporation, ATmega32M1 Automotive Datasheet - Page 259
ATmega32M1 Automotive
Manufacturer Part Number
ATmega32M1 Automotive
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT90CAN128_AUTOMOTIVE.pdf
(225 pages)
2.ATMEGA16M1_AUTOMOTIVE.pdf
(12 pages)
3.ATMEGA16M1_AUTOMOTIVE.pdf
(25 pages)
4.ATMEGA16M1_AUTOMOTIVE.pdf
(367 pages)
Specifications of ATmega32M1 Automotive
Flash (kbytes)
32 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)
2
Eeprom (bytes)
1024
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 150
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
- AT90CAN128_AUTOMOTIVE PDF datasheet
- ATMEGA16M1_AUTOMOTIVE PDF datasheet #2
- ATMEGA16M1_AUTOMOTIVE PDF datasheet #3
- ATMEGA16M1_AUTOMOTIVE PDF datasheet #4
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- Download datasheet (7Mb)
19.2
19.2.1
7647G–AVR–09/11
Typical applications
LIN Current Source
During the configuration of a LIN node in a cluster, it may be necessary to attribute dynami-
cally an unique physical address to every cluster node. The way to do it is not described in the
LIN protocol.
The Current Source offers an excellent solution to associate a physical address to the applica-
tion supported by the LIN node. A full dynamic node configuration can be used to set-up the
LIN nodes in a cluster.
ATmega16/32/64/M1/C1 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 com-
munication 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 ATmega16/32/64/M1/C1 immunizes the address detection against any kind
of voltage variations.
Table 19-1.
Physical
Address
0
1
2
3
4
5
6
7
Resistor Value
1 000
2 200
3 300
4 700
6 800
10 000
15 000
22 000
Example of Resistor Values(±5%) for a 8-address System (AV
R
load
(Ohm)
0.1
0.22
0.33
0.47
0.68
1
1.5
2.2
Voltage (V)
Measured
Typical
Atmel ATmega16/32/64/M1/C1
Reading with
a 2.56V ref
Minimum
40
88
132
188
272
400
600
880
Reading with
a 2.56V ref
Typical
CC
Reading with
= 5V
a 2.56V ref
Maximum
(1)
)
259
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