SAF-XC866-4FRA BE Infineon Technologies, SAF-XC866-4FRA BE Datasheet - Page 76

• Manufacturer Part Number: SAF-XC866-4FRA BE
• Description: IC MCU 8BIT 12KB FLASH 38TSSOP
• Manufacturer: Infineon Technologies
• Series: XC8xxr

Specifications of SAF-XC866-4FRA BE

• Core Processor: XC800
• Core Size: 8-Bit
• Speed: 86MHz
• Connectivity: SSI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 19
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 38-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

3.13
The UART can be used to support the Local Interconnect Network (LIN) protocol for both
master and slave operations. The LIN baud rate detection feature provides the capability
to detect the baud rate within LIN protocol using Timer 2. This allows the UART to be
synchronized to the LIN baud rate for data transmission and reception.
LIN is a holistic communication concept for local interconnected networks in vehicles.
The communication is based on the SCI (UART) data format, a single-master/multiple-
slave concept, a clock synchronization for nodes without stabilized time base. An
attractive feature of LIN is self-synchronization of the slave nodes without a crystal or
ceramic resonator, which significantly reduces the cost of hardware platform. Hence, the
baud rate must be calculated and returned with every message frame.
The structure of a LIN frame is shown in
• header, which comprises a Break (13-bit time low), Synch Byte (55
• response time
• data bytes (according to UART protocol)
• checksum
Figure 30
3.13.1
LIN header transmission is only applicable in master mode. In the LIN communication,
a master task decides when and which frame is to be transferred on the bus. It also
identifies a slave task to provide the data transported by each frame. The information
needed for the handshaking between the master and slave tasks is provided by the
master task through the header portion of the frame.
The header consists of a break and synch pattern followed by an identifier. Among these
three fields, only the break pattern cannot be transmitted as a normal 8-bit UART data.
Data Sheet
LIN Protocol
LIN Header Transmission
Header
Structure of LIN Frame
Synch
Protected
identifier
Response
Frame slot
space
Frame
Data 1
Figure
72
Response
30. The frame consists of the:
Data 2
Data N
Functional Description
Checksum
H
), and ID field
V1.2, 2007-10
space
frame
Inter-
XC866