MC68HC08AS32 Datasheet, PDF (342/394 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Byte Data Link Controller-Digital (BDLC-D)
Valid SOF Symbol
In Figure 20-9(4), if the active-to-passive received transition
beginning the next data bit (or symbol) occurs between c and d, the
current symbol would be considered a valid SOF symbol.
Valid BREAK Symbol
In Figure 20-10, if the next active-to-passive received transition does
not occur until after e, the current symbol will be considered a valid
BREAK symbol. A BREAK symbol should be followed by a
start-of-frame (SOF) symbol beginning the next message to be
transmitted onto the J1850 bus. See 20.5.2 J1850 Frame Format for
BDLC response to BREAK symbols.
240 µs
ACTIVE
PASSIVE
(2) VALID BREAK SYMBOL
e
Figure 20-10. J1850 VPW Received BREAK Symbol Times
Advance Information
342
Byte Data Link Controller-Digital (BDLC-D)
MC68HC08AS32 — Rev. 3.0
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