iC-MD RS-422 QUADRATURE
ENCODER RECEIVER/COUNTER WITH SPI AND BiSS
Rev A1, Page 22/23
APPLICATIONS NOTES
RS422 12 V capable inputs setup
The following figure shows the resistors configuration
used for a 12 V capable RS422 inputs. (see Fig. 9).
VDD
0..5.5V
VDD
RS-422 Receivers
24-bit REF Counter
A0
B0
Z0
1kΩ
1kΩ
1kΩ
1kΩ
AP
AP
AP
AD
AN
REFCNT(23:0)
Z Signal
4.7kΩ
R
APR
ANR
COUNT
Reset
RESAB
+
-12..12V
-12..12V
R
-
4.7kΩ
AN
BP
AN
BP
1kΩ
1kΩ
1kΩ
1kΩ
BP
BD
BN
1x48bit Counter
1x32bit Counter
1,2x24bit Counters
4.7kΩ
R
BPR
BNR
+
-12..12V
-12..12V
R
-
4.7kΩ
1,2,3x16bit Counters
BN
CP
BN
CP
A1
Z
CBZ
&
B1
Z1
1kΩ
1kΩ
1kΩ
1kΩ
CP
CD
CN
AB(47:0)
4.7kΩ
R
CPR
CNR
D
Q
1
+
-12..12V
-12..12V
A2
R
-
4.7kΩ
B2
CN
CN
CNTFLG
TPI
Figure 9: RS422 12 V capable configuration
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