ATmega16M1 Automotive Atmel Corporation, ATmega16M1 Automotive Datasheet - Page 215
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ATmega16M1 Automotive
Manufacturer Part Number
ATmega16M1 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 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
- AT90CAN128_AUTOMOTIVE PDF datasheet
- ATMEGA16M1_AUTOMOTIVE PDF datasheet #2
- ATMEGA16M1_AUTOMOTIVE PDF datasheet #3
- ATMEGA16M1_AUTOMOTIVE PDF datasheet #4
- Current page: 215 of 367
- Download datasheet (7Mb)
17.5.6.2
17.5.6.3
17.5.7
7647G–AVR–09/11
Data Length
Re-synchronization in LIN Mode
Handling LBT[5..0]
When waiting for Rx Header, LBT[5..0] = 32 in LINBTR register. The re-synchronization
begins when the BREAK is detected. If the BREAK size is not in the range (11 bits min., 28
bits max. — 13 bits nominal), the BREAK is refused. The re-synchronization is done by adjust-
ing LBT[5..0] value to the SYNCH field of the received header (0x55). Then the PROTECTED
IDENTIFIER is sampled using the new value of LBT[5..0]. The re-synchronization imple-
mented in the controller tolerates a clock deviation of ±20% and adjusts the baud rate in a
±2% range.
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
page
Figure 17-8. Handling LBT[5..0]
Section 17.4.6 “LIN Commands” on page 209
set 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.
UART mode). A minimum of 8 is required for LBT[5..0] due to the sampling operation.
215).
=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
Atmel ATmega16/32/64/M1/C1
=0
describes how to set or how are automatically
=1
Disable re-synch. in LIN mode
LBT[5..0] = LBT[5..0] to write
LDISR forced to 1
(LBT[5..0]
min
=8)
Figure 17-8 on
215
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