ATmega16M1 Automotive Atmel Corporation, ATmega16M1 Automotive Datasheet - Page 178

• Manufacturer Part Number: ATmega16M1 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATmega16M1 Automotive

• Flash (kbytes): 16 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): 1
• Eeprom (bytes): 512
• 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

16.5
16.5.1
16.5.2
16.5.2.1
178
Message Objects
Atmel ATmega16/32/64/M1/C1
Number of MObs
Operating Modes
Disabled
Figure 16-9. Overload Frame
The MOb is a CAN frame descriptor. It contains all information to handle a CAN frame. This
means that a MOb has been outlined to allow to describe a CAN message like an object. The
set of MObs is the front end part of the “mailbox” where the messages to send and/or to
receive are pre-defined as well as possible to decrease the work load of the software.
The MObs are independent but priority is given to the lower one in case of multi matching. The
operating modes are:
This device has 6 MObs, they are numbered from 0 up to 5 (i=5).
There is no default mode after RESET.
Every MOb has its own fields to control the operating mode. Before enabling the CAN periph-
eral, each MOb must be configured (ex: disabled mode - CONMOB=00).
Table 16-1.
In this mode, the MOb is “free”.
MOb Configuration
0
0
1
1
– Disabled mode
– Transmit mode
– Receive mode
– Automatic reply
– Frame buffer receive mode
Instructions
OVRQ bit
OVFG bit
RXCDAN
TXCDAN
MOb Configuration
0
1
0
1
Reply Valid
0
1
Ident "A"
x
x
x
x
x
Cmd
Setting OVRQ bit
RTR Tag
Message Data "A"
x
0
1
0
1
x
Operating Mode
Disabled
Tx Data Frame
Tx Remote Frame
Rx Data Frame
Rx Remote Frame
Rx Remote Frame then, Tx Data Frame (reply)
Frame Buffer Receive Mode
CRC
A
Interframe
Resetting OVRQ bit
Overload Frame
Overload Frame
7647G–AVR–09/11
Ident "B"