IC-HF Datasheet, PDF (30/36 Pages) IC-Haus GmbH – 6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER

iC-HF
preliminary
6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev C1, Page 30/36
If it is desired to use only three channels of iC-HF (chan-
nels 1, 2, and 3), it is possible to implement BiSS com-
munication with no need for extra channels. This can
be achieved by using pins NQ1, NQ2, and NQ3. Figure
33 shows this example.
To achieve this, iC-HF must be configured either in
A/B/Z and U/V/W mode (as in this example) or in A/B/Z
and BiSS/SSI mode. In default state, iC-HF is a set
of line drivers and signals. PB0, PB1, and PB2 from
iC-MU are output through channels 1, 2 and 3 as differ-
ential signals. With the Encoder Link Sequence at pins
Q1/NQ1, iC-HF enters Encoder Link State. Pins NQ1,
NQ2 and NQ3 are directly connected to NX1, NX2 and
NX3 respectively. It is possible to access the BiSS in-
terface of iC-MU through these three lines, as shown in
figure 33.
VPA
VPD
iC-MU
ANA/DIG OUTPUT
1 μF
PB0
A
PB1
B
PB2
Z
PB3 NER
SER INTERFACE
SCL
SDA
I2C INTERFACE
PA0
PA1
MA
PA2
SLI
PA3
SLO
VNA
VND
EEPROM
VDDS
GNDS
REVERSE POLARITY PROTECTION
VDD
GND
X1
NX1
X2
NX2
X3
NX3
X4
X5
X6
PTC
ECM
OEN
FMSEL1
FMSEL2
NERRI
BYP
EBIS TRI
CONTROL
LOGIC
OVT
PoDo
1
Encoder Link
Q1
NQ1
Encoder Link
Q2
NQ2
Encoder Link
Q3
NQ3
Encoder Link
Q4
NQ4
Encoder Link
Q5
NQ5
Encoder Link
Q6
NQ6
BYPR
ENCODER LINK
REQUEST
DETECTION
OVT
PoDo
OVERTEMP
POWER DOWN
Q1
NQ1
NERR
iC-HF
4.5..5.5V
1 μF
A
MA
B
SLI
Z
SLO
NERR
Figure 33: Example application with iC-MU in A/B/Z mode and iC-HF in Encoder Link State with BiSS at
channels 1,2, and 3