IC-MD Datasheet, PDF (22/23 Pages) IC-Haus GmbH – ENCODER RECEIVER/COUNTER WITH SPI AND BiSS

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