HMS Anybus CompactCom B40 Modbus Serial User Manual page 20

Hardware Design
4.1.5 RESET (Reset Input)
Signal Name
RESET
The Anybus CompactCom does not feature any internal reset regulation. To establish a reliable
interface, the host application is solely responsible for resetting the Anybus CompactCom when
the supply voltage is out of the specified range.
Power Up
Power
/RESET
Fig. 5
Powerup time limits are given in the table below:
Symbol
t
A
t
B
Restart
The reset pulse duration must be at least 10 µs in order for the Anybus CompactCom to properly
recognize a reset.
RESET
Fig. 6
Symbol
t
C
Anybus ® CompactCom ™ B40 Modbus Serial User Manual
Pin Type Pin
I 3
Power
On
3.3V
0V
t
A
V
IH
V
IL
Max.
Min. Definition
- -
Time until the power supply is stable after power-on; the duration depends
on the power supply design of the host application and is thus beyond the
scope of this document.
-
1 ms Safety margin.
V
IH
V
IL
Max.
Min. Definition
-
10 µs Reset pulse width.
Description
Reset
Used to reset the module.
Power
Stable
t
B
t
C
18 (48)
t
t
t
SCM-1202-130 1.1 en-US