IC-HF Datasheet, PDF (25/36 Pages) IC-Haus GmbH – 6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER

iC-HF
preliminary
6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
iC-MH, iC-MH8, iC-MH16, iC-MHM
Rev C1, Page 25/36
Figure 28 shows an example driving iC-MH, a 12 bit
angular Hall encoder (iC-MH8, iC-MH16, iC-MHM can
also be used). iC-HF provides reverse polarity protec-
tion.
In this example, FMSEL1 and FMSEL2 are low and
A/B/Z and U/V/W mode is selected. All 6 channels work
as RS-422 line drivers. OEN is set hi and all channels
are enabled. iC-MH has no complementary outputs,
therefore pins NX1 . . . NX3 from iC-HF are kept discon-
nected.
After a valid Encoder Link Sequence all connected sig-
nals at X1 to X6 will be directly linked to outputs Q1 to
Q6.
NERR output from iC-MH is connected to input pin
NERRI of iC-HF. Any error occurring either on iC-MH
or on iC-HF will be signaled through NERR output pin
from iC-HF.
INCR INTERFACE
SERIAL
INTERFACE
RS422
VPD
VPA
A
B
Z
U
V
W
MA
SLO
SLI
ERROR MONITOR
NERR
VND
VNA
iC-MH
VDDS
1 μF
GNDS
VDD
4.5..5.5V
REVERSE POLARITY PROTECTION GND
1 μF
X1
NX1
X2
NX2
X3
NX3
X4
X5
X6
PTC
ECM
OEN
FMSEL1
FMSEL2
NERRI
BYP EBIS TRI
CONTROL
LOGIC
OVT
PoDo
1
Q1
TRI
NQ1
Q2
RS422 output
NQ2
Q3
RS422 output
NQ3
Q4
RS422 output
NQ4
Q5
RS422 output
NQ5
Q6
RS422 output
NQ6
BYPR
ENCODER LINK
REQUEST
DETECTION
OVT
PoDo
OVERTEMP
POWER DOWN
Q1
NQ1
NERR
iC-HF
A
B
Z
U
V
W
to mC
NERR
Figure 28: Example application with iC-MH in A/B/Z and U/V/W mode
Mind voltage and current requirements for programming/zapping OTP devices with iC-HF use.