ATUC64L4U Atmel Corporation, ATUC64L4U Datasheet - Page 450

• Manufacturer Part Number: ATUC64L4U
• Manufacturer: Atmel Corporation

Specifications of ATUC64L4U

• Flash (kbytes): 64 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 50 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 17
• Hardware Qtouch Acquisition: Yes
• Max I/o Pins: 36
• Ext Interrupts: 36
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 2
• Uart: 4
• Lin: 4
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 460
• Analog Comparators: 8
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 16
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.62 to 3.6
• Operating Voltage (vcc): 1.62 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 18
• Input Capture Channels: 12
• Pwm Channels: 35
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

20.6.5.1
20.6.5.2
20.6.5.3
20.6.5.4
20.6.5.5
Figure 20-21. Header Transmission
20.6.5.6
32142A–12/2011
Baud Rate
TXRDY
LINIR
LINIR
Clock
Write
TXD
Modes of operation
Receiver and Transmitter Control
Baud Rate Configuration
Character Transmission and Reception
Header Transmission (Master Node Configuration)
Header Reception (Slave Node Configuration)
ID
13 dominant bits (at 0)
customizable response data lengths, and requires minimal CPU resources. Writing 0xA (master)
or 0xB (slave) to MR.MODE enables this mode.
Changing LIN mode after initial configuration has to be followed by a transceiver software reset
in order to avoid unpredictable behavior.
See Section “20.6.2” on page 439.
The LIN nodes baud rate is configured in the Baud Rate Generator Register (BRGR),
tion “20.6.1.1” on page 437.
See
All LIN frames start with a header sent by the master. As soon as the identifier has been written
to the Identifier Character field in the LIN Identifier Register (LINIR.IDCHR), TXRDY is cleared
and the header is sent. The header consists of a Break, Sync, and Identifier field. TXRDY is set
when the identifier has been transferred into the transmitters shift register.
The Break field consists of 13 dominant bits, the break, and one recessive bit, the break delim-
iter. The Sync field is the character 0x55. The Identifier field contains the Identifier as written to
IDCHR. The identifier parity bits can be generated automatically (see
The USART stays idle until it detects a break field, consisting of at least 11 consecutive domi-
nant bits (zeroes) on the bus. A received break will set the Lin Break bit (CSR.LINBK). The Sync
field is used to synchronize the baud rate (see
Identifier bit (CSR.LINID) is set when the Identifier has been received. The Identifier parity bits
can be automatically checked (see
and LINID.
Break Field
”Transmitter Operations” on page
1 recessive bit
Delimiter
Break
(at 1)
Start
Bit
1
Section
0
Synch Byte = 0x55
440, and
1
0
20.6.5.8). Writing a one to RSTSTA will clear LINBK
1
Section
0
”Receiver Operations” on page
1
ATUC64/128/256L3/4U
0
20.6.5.7). IDCHR is updated and the LIN
Stop
Bit
Start
Bit
ID0 ID1 ID2 ID3 ID4 ID5 ID6 ID7
Section
20.6.5.8).
442.
Stop
See Sec-
Bit
450