XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 506

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

Byte Data Link Controller (BDLC)
27.6 BDLC Protocol Handler
Technical Data
506
NOTE:
another message. The second logic 1 bit will not be sent if the first loses
arbitration. If the BDLC has lost arbitration to another valid message,
then the two extra logic 1s will not corrupt the current message.
However, if the BDLC has lost arbitration due to noise on the bus, then
the two extra logic 1s will ensure that the current message will be
detected and ignored as a noise-corrupted message.
The protocol handler is responsible for framing, arbitration, CRC
generation/checking, and error detection. The protocol handler
conforms to SAE J1850 — Class B Data Communications Network
Interface.
Motorola assumes that the reader is familiar with the J1850 specification
before this protocol handler description is read.
Byte Data Link Controller (BDLC)
Figure 27-12. BDLC Block Diagram
PHYSICAL INTERFACE
PROTOCOL HANDLER
MUX INTERFACE
CPU INTERFACE
TO J1850 BUS
TO CPU
MC68HC908AZ60A — Rev 2.0
BDLC
MOTOROLA