ATmega64C1 Automotive Atmel Corporation, ATmega64C1 Automotive Datasheet - Page 206

• Manufacturer Part Number: ATmega64C1 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATmega64C1 Automotive

• 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 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: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

17.3.3
17.3.4
17.3.5
17.4
206
LIN / UART Controller
Atmel ATmega16/32/64/M1/C1
Data Transport
Schedule Table
Compatibility with LIN 1.3
Two types of data may be transported in a frame; signals or diagnostic messages.
The master task (in the master node) transmits frame headers based on a schedule table. The
schedule table specifies the identifiers for each header and the interval between the start of a
frame and the start of the following frame. The master application may use different schedule
tables and select among them.
LIN 2.1 is a super-set of LIN 1.3.
A LIN 2.1 master node can handle clusters consisting of both LIN 1.3 slaves and/or LIN 2.1
slaves. The master will then avoid requesting the new LIN 2.1 features from a LIN 1.3 slave:
LIN 2.1 slave nodes can not operate with a LIN 1.3 master node (e.g. the LIN1.3 master does
not support the enhanced checksum).
The LIN 2.1 physical layer is backwards compatible with the LIN1.3 physical layer. But not the
other way around. The LIN 2.1 physical layer sets greater requirements, i.e. a master node
using the LIN 2.1 physical layer can operate in a LIN 1.3 cluster.
The LIN/UART controller is divided in three main functions:
These functions mainly use two services:
Because these two services are basically UART services, the controller is also able to switch
into an UART function.
• Signals
• Diagnostic messages
• Enhanced checksum,
• Re-configuration and diagnostics,
• Automatic baud rate detection,
• "Response error" status monitoring.
• Tx LIN Header function,
• Rx LIN Header function,
• LIN Response function.
• Rx service,
• Tx service.
Signals are scalar values or byte arrays that are packed into the data field of a frame. A
signal is always present at the same position in the data field for all frames with the same
identifier.
Diagnostic messages are transported in frames with two reserved identifiers. The
interpretation of the data field depends on the data field itself as well as the state of the
communicating nodes.
7647G–AVR–09/11