Interconnecting Multiple HSCAN Repeaters byText/Rint Signals

AND8361/D
AMIS42700 –
Interconnecting Multiple
HS­CAN Repeaters by
Text/Rint Signals
http://onsemi.com
Prepared by: Peter Cox and Pavel Drazdi
ON Semiconductor
APPLICATION NOTE
of the external logical network will grow as the number of
repeaters increases (there will be as many AND gates as
repeaters each of them having increasing number of inputs;
e.g. for 4 repeaters, 4 AND gates would be needed, each of
them with 3 inputs).
The below picture shows how more than 2 repeaters
AMIS42700 can be interconnected by their CMOS signals
(Text and Rint pins). External logical gates (ANDs) are
necessary. The AND gates ensure that a dominant (i.e.
logical 0) signal is channelled to each repeater in case a
dominant occurs on any other repeater. Thus the complexity
© Semiconductor Components Industries, LLC, 2008
December, 2008 − Rev. 0
1
Publication Order Number:
AND8361/D
AND8361/D
VBAT
CAN BUS 1
5V−reg
CD
100 nF
CD
100 nF
VCC
Vref
VCC
8 13 CANH1
EN1 10 12
EN2
Rx0
mC
CAN BUS 2
CAN
Tx0
con−
Text
troller
Rint
R LT
2
14
7
AMIS−42700
4
19
CANL1
60 W
CANH2
R LT
3
9
5
18
6 15 16 17
CANL2
60 W
GND
GND
+ 5V
CAN BUS 3
CAN BUS 4
CD
100 nF
Vref
VCC
EN1
10
8 13 CANH1
12
R LT
EN2 2
Rx0
7
Tx0
14
AMIS−42700
4
Text
CANH2
19
R LT
3
Rint
60 W
CANL1
9
18
6 15 16 17
5
CANL2
60 W
GND
+ 5V
CAN BUS 5
CAN BUS 6
CD
100 nF
VCC
Vref
8 13 CANH1
EN1 10 12
EN2
Rx0
Tx0
Text
Rint
R LT
2
14
7
AMIS−42700
4
19
CANL1
60 W
CANH2
R LT
3
9
5
6 15 16 17
PC20071116.1
18
CANL2
60 W
GND
Figure 1.
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AND8361/D