MC68HC58 Motorola, MC68HC58 Datasheet - Page 31

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

2.5.2 Method 2 — Switching V
MC68HC58
TECHNICAL DATA
With V
DLC is in standby mode and sources 12 Vdc when the DLC detects J1850 bus activity.
Refer to 2.6 Reset for more information on supply stabilization. Figure 2-5 shows
BUS, INT, RST, and PSEN timing relationships. Refer to APPENDIX A ELECTRICAL
CHARACTERISTICS for more information on parameter specifications.
BATT
DLC MODE
and V
V
PSEN
BATT
RST
BUS
V
V
Figure 2-5 Method 2 — Switching V
INT
CC
DD
PASSIVE
ACTIVE
CC
12V
12V
0V
0V
5V
5V
0V
5V
0V
0V
0V
5V
applied, the PSEN pin goes to a high-impedance state when the
HIGH IMPEDANCE
STANDBY
t
ACDLY —
SIGNAL AND PIN DESCRIPTIONS
DD
With PSEN
RESET
STANDBY
NORMAL
DD
with PSEN
HIGH IMPEDANCE
RESET
STANDBY
STANDBY
DLC PMC2
MOTOROLA
2-15