MC68HC58 Motorola, MC68HC58 Datasheet - Page 42

• Manufacturer Part Number: MC68HC58
• Description: Data Link Controller
• Manufacturer: Motorola

3.2.8 Valid Active Logic One
3.2.9 Valid Active Logic Zero
3-8
MOTOROLA
If the active to passive transition beginning the next data bit or symbol occurs between
B and C, the current bit is considered a logic one. Refer to Figure 3-5 (2).
If the active to passive transition beginning the next data bit or symbol occurs between
C and D, the current bit is considered a logic zero. Refer to Figure 3-5 (3).
ACTIVE
PASSIVE
ACTIVE
PASSIVE
ACTIVE
PASSIVE
ACTIVE
PASSIVE
ACTIVE
PASSIVE
A
(1) INVALID ACTIVE BIT - A TO B
(2) VALID ACTIVE LOGIC ONE - B TO C
(3) VALID ACTIVE LOGIC ZERO - C TO D
(4) VALID SOF SYMBOL - D TO E
(5) VALID BREAK SYMBOL - E TO F
Figure 3-5 J1850 VPW Active Symbols
64 S
B
B
128 S
J1850 FRAME FORMAT
200 S
C
C
280 S
D
D
E
E
J1850 ACTIVE SYMBOLS
TECHNICAL DATA
F
MC68HC58