MC68HC08AS32 Datasheet, PDF (341/394 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Byte Data Link Controller-Digital (BDLC-D)
BDLC MUX Interface
200 µs
128 µs
64 µs
ACTIVE
(1) INVALID ACTIVE BIT
PASSIVE
a
ACTIVE
(2) VALID ACTIVE LOGIC 1
PASSIVE
a
b
ACTIVE
(3) VALID ACTIVE LOGIC 0
PASSIVE
ACTIVE
b
c
(4) VALID SOF SYMBOL
PASSIVE
c
d
Figure 20-9. J1850 VPW Received Active Symbol Times
Invalid Active Bit
In Figure 20-9(1), if the active-to-passive received transition
beginning the next data bit (or symbol) occurs between the
passive-to-active transition beginning the current data bit (or symbol)
and a, the current bit would be invalid.
Valid Active Logic 1
In Figure 20-9(2), if the active-to-passive received transition
beginning the next data bit (or symbol) occurs between a and b, the
current bit would be considered a logic 1.
Valid Active Logic 0
In Figure 20-9(3), if the active-to-passive received transition
beginning the next data bit (or symbol) occurs between b and c, the
current bit would be considered a logic 0.
MC68HC08AS32 — Rev. 3.0
MOTOROLA
Byte Data Link Controller-Digital (BDLC-D)
Advance Information
341