IC-HF Datasheet, PDF (24/36 Pages) IC-Haus GmbH – 6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER

iC-HF
preliminary
6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
APPLICATION EXAMPLES
Rev C1, Page 24/36
All figures indicate only the basic operation with iC-HF
and do not contain all details, connections, configura-
tions and options for a working system.
iC-HF can drive a wide range of applications and combi-
nations of sensors and interpolators and their possible
signals and interfaces. In this chapter, a group of exam-
ples on interconnecting different devices with iC-HF is
presented.
Function Mode
A/B/Z and U/V/W
A/B/Z and BiSS/SSI
iC-PTxxyy
iC-PT-Hxxyy
X
iC-MU
X
X
iC-MH
iC-MHM
X
X
iC-NQ
X
Table 12: Applications and modes
iC-PTxxyy/ iC-PT-Hxxyy
Figure 27 shows an example of using iC-HF for
driving iC-PTxxyy/ iC-PT-Hxxyy, which are three
complementary channel photodiode arrays. iC-P-
Txxyy/iC-PT-Hxxyy are supplied through the reverse
polarity protected supply pins, VDDS and GNDS.
fore, A, B, and Z signals are transmitted under RS-422
protocol through channels 1 to 3. Signals U, V, and W
are connected to inputs X4 . . . X6 and outputs through
channels 4 to 6. Set the OEN pin hi for channel en-
abling.
FMSEL1 and FMSEL2 are set to lo, therefore iC-HF
is in A/B/Z and U/V/W mode, a 6 channel RS-422 line
driver.
A pull-down resistor (10 kΩ for iC-PTxxyy, 2.7 kΩ for
iC-PT-Hxxyy) at SEL pin forces iC-PTxxyy/ iC-PT-Hxxyy
to work in A/B operation x1 interpolated. Outputs PA,
PB, and PZ are connected to pins X1 to X3. There-
iC-HF enters Encoder Link State when ECM pin is set to
hi. Pins NA, NB, and NZ from iC-PTxxyy/ iC-PT-Hxxyy
are connected to NX1, NX2, and NX3 respectively. PTC
from iC-HF is connected to SEL from iC-PTxxyy/ iC-P-
T-Hxxyy. After a successful Encoder Link Sequence,
SEL/PTC node will be driven at VDDS/2. iC-PTxxyy/H
will enter analog mode and all signals will be directly
linked to output pins Qi/NQi.
TIP TIN SEL
SIGNAL
COMPARATION
AND
QUADRATURE
OUTPUT
LED
POWER
CONTROL
INDEX OUTPUT
VCC
LED
PA
NA
PB
NB
PZ
NZ
U
iC-PTxxyy _-
V
+
iC-PTxxyyH
W
COMMUTATION
GND
VDDS
1 μF
GNDS
VDD
3.5..5.5V
REVERSE POLARITY PROTECTION GND
1 μF
X1
BYP
NX1
X2
NX2
X3
NX3
X4
X5
X6
PTC
ECM
OEN
FMSEL1
FMSEL2
NERRI
BYP EBIS TRI
CONTROL
LOGIC
OVT
PoDo
1
RS422
Q1
TRI
NQ1
Q2
RS422
NQ2
Q3
RS422
NQ3
Q4
RS422
NQ4
Q5
RS422 I/O
NQ5
Q6
RS422 I/O
NQ6
BYPR
ENCODER LINK
REQUEST
DETECTION
OVT
PoDo
OVERTEMP
POWER DOWN
Q1
NQ1
NERR
iC-HF
A
B
Z
U
V
W
NERR
Figure 27: Example application of iC-PTxxyy/ iC-PT-Hxxyy in A/B operation x1 interpolated with iC-HF