ATmega32M1 Atmel Corporation, ATmega32M1 Datasheet - Page 209

• Manufacturer Part Number: ATmega32M1
• Manufacturer: Atmel Corporation

Specifications of ATmega32M1

• 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 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

20.5.6.3
20.5.7
20.5.7.1
8209D–AVR–11/10
Data Length
Handling LBT[5:0]
Data Length in LIN 2.1
The new LBT[5..0] value will be used up to the end of the response. Then, the LBT[5..0] will be
reset to 32 for the next header.
The LINBTR register can be used to re-calibrate the clock oscillator.
The re-synchronization is not performed if the LIN node is enabled as a master.
LDISR bit of LINBTR register is used to:
Note that the LENA bit of LINCR register is important for this handling (see
Figure 20-8. Handling LBT[5:0]
Section 20.4.6 “LIN Commands” on page 203
the LRXDL[3..0] or LTXDL[3..0] fields of LINDLR register before receiving or transmitting a
response.
In the case of Tx Response the LRXDL[3..0] will be used by the hardware to count the number of
bytes already successfully sent.
In the case of Rx Response the LTXDL[3..0] will be used by the hardware to count the number of
bytes already successfully received.
If an error occurs, this information is useful to the programmer to recover the LIN messages.
• To enable the setting of LBT[5:0] (to manually adjust the baud rate especially in the case of
• Disable the re-synchronization in LIN Slave Mode for test purposes
• If LTXDL[3..0]=0 only the CHECKSUM will be sent
• If LRXDL[3..0]=0 the first byte received will be interpreted as the CHECKSUM
• If LTXDL[3..0] or LRXDL[3..0] >8, values will be forced to 8 after the command setting and
UART mode). A minimum of 8 is required for LBT[5:0] due to the sampling operation
before sending or receiving of the first byte
=1
Write in LINBTR register
(LINCR bit 4)
LENA ?
Enable re-synch. in LIN mode
LBT[5..0] forced to 0x20
LDISR forced to 0
=0
LDISR
to write
=0
describes how to set or how are automatically set
ATmega16M1/32M1/64M1
=1
Disable re-synch. in LIN mode
LBT[5..0] = LBT[5..0] to write
LDISR forced to 1
(LBT[5..0]
min
Figure
=8)
20-8).
209