ATA6617-P3PW Atmel, ATA6617-P3PW Datasheet - Page 198
ATA6617-P3PW
Manufacturer Part Number
ATA6617-P3PW
Description
MCU W/LIN TX/5V REG/WTCDG 38VQFN
Manufacturer
Atmel
Series
AVR® ATA66 LIN-SBCr
Datasheet
1.ATA6617-EK.pdf
(308 pages)
Specifications of ATA6617-P3PW
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, LIN, SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
16
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 11x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
38-VQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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4.16.5.7
Figure 4-76. LIN2.1 - Rx Response - No Error
198
LRXDL (*)
LTXDL (*)
LIN bus
LBUSY
(*) : LRXDL & LTXDL updated by user
Atmel ATA6616/ATA6617
Data Length
LIDOK
LINDLR=0x?4
Section 4.16.4.6 “LIN Commands” on page 191
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.
Data Length in LIN 2.1
Data Length in LIN 1.3
Data Length in Rx Response
4
?
• 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
• LRXDL and LTXDL fields are both hardware updated before setting LIDOK by decoding the
• Via the above mechanism, a length of 0 or >8 is not possible.
• The user initializes LRXDL field before setting the Rx Response command,
• After setting the Rx Response command, LTXDL is reset by hardware,
• LRXDL field will remain unchanged during Rx (during busy signal),
• LTXDL field will count the number of received bytes (during busy signal),
• If an error occurs, Rx stops, the corresponding error flag is set and LTXDL will give the
• If no error occurs, LRXOK is set after the reception of the CHECKSUM, LRXDL will be
DATA-0
1
before sending or receiving of the first byte.
data length code contained in the received PROTECTED IDENTIFIER (LRXDL = LTXDL).
number of received bytes without error,
unchanged (and LTXDL = LRXDL).
st
Byte
LCMD=Rx Response
0
2
DATA-1
nd
1
Byte
DATA-2
3
rd
2
Byte
describes how to set or how are automatically
DATA-3
4
th
3
Byte
LCMD2..0=000
CHECKSUM
4
b
9132D–AUTO–12/10
LRXOK
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