MC68HC58 Motorola, MC68HC58 Datasheet - Page 30

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

2.5.1 Method 1 — All Supplies Applied
2-14
MOTOROLA
When V
when the DLC is in standby mode, and sources 12 Vdc when the DLC is activated.
Figure 2-4 shows J1850 BUS, INT, RST, and PSEN timing relationships. If the host
does not service the interrupt due to bus activity, the DLC automatically re-enters
standby mode. Refer to APPENDIX A ELECTRICAL CHARACTERISTICS for more
information on parameter specifications.
BATT
DLC MODE
Figure 2-4 Method 1 — Standby Mode Supplies Applied
V
, V
CC
V
PSEN
/V
BUS
BATT
RST
INT
DD
CC
PASSIVE
ACTIVE
, and V
12V
12V
0V
5V
0V
5V
0V
5V
0V
0V
HIGH IMPEDANCE
STANDBY
DD
SIGNAL AND PIN DESCRIPTIONS
are applied, the PSEN pin goes to a high-impedance state
t
ACINT
NORMAL
HIGH IMPEDANCE
STANDBY
DLC PMC1
TECHNICAL DATA
MC68HC58