IC-MB4_15 Datasheet, PDF (2/40 Pages) IC-Haus GmbH – BiSS INTERFACE MASTER

iC-MB4
BiSS INTERFACE MASTER
preliminary
Rev B2, Page 2/40
DESCRIPTION
iC-MB4 is a single-chip BiSS/SSI interface master
controller featuring an 8 bit bus interface to industrial
standard microcontrollers. Alternatively an SPI inter-
face enables serial communication between iC-MB4
and the connected microcontroller. Up to 8 BiSS
slaves can be accessed. The BiSS devices are con-
nected to clock line MA1 and data return line SL1 us-
ing RS422 transceivers (Figure 2). The BiSS devices
can be connected directly in noise-free environments.
A maximum of 8 BiSS slaves is supported, each with
their own configurable data sections covering:
1. Sensor data from 0 to 64 bit
(for measurement data, flags like alarm and
warning, life cycle counter, . . . )
2. Register data with 128 bytes per slave ID
(e.g. for device parameters)
EOT by a high; if faults occur during transmission pin
NER signals a low. Errors in communication can be
verified by the microcontroller via a status register; a
system error message can also enter this register if
bidirectional message pin NER is kept low by external
intervention. iC-MB4 generates a clock signal for sen-
sor communication using an internal 20 MHz oscillator.
The clock can also be supplied externally. iC-MB4
is based on the BiSS master IP family MB100_X.
clock/
controldata
V+
MA+
MA-
MA+
MA-
ID 1..N-1
ID 0
iC-MB4 provides two RAM memory banks for each
slave, enabling parallel access of the microcontroller
while new sensor data is being read in. A 64 byte
memory supports register transfers. Sensor data ac-
quisition is started by a microcontroller command or
via pin GETSENS. Alternatively, iC-MB4 can also read
in new sensor data automatically; the cycle time in
this instance can be set as required. The end of sen-
sor data acquisition and reading is signaled at pin
sensordata/
controldata
SL+
SL-
Last Slave
SLO+
SLO-
Master
V-
Device 1 (Sensor)
Figure 1: Point-to-point connection of iC-MB4 to
one device with several slaves
clock/
controldata
V+
MA+
MA-
MA+
MA-
actuatordata
MO+
MO-
sensordata/
controldata
SL+
SL-
SLI+
SLI-
SL+
SL-
ID 1..N-1
ID 0
Last Slave
V+
MAO+ MA+
MAO- MA-
SLO+
SLO-
MO+
MO-
SLR+ SL+
SLR- SL-
ID N+1..M-1
ID N
Master
V-
Device 2 (Sensor/Actuator)
V-
Device 1 (Sensor/Actuator)
Figure 2: Example network of iC-MB4 and two devices
The device offered here is a multifunctional iC that contains integrated BiSS C interface components. The BiSS C process is protected
by patent DE 10310622 B4 owned by iC-Haus GmbH. Users benefit from the open BiSS C protocol with a free license which is
necessary when using the BiSS C protocol in conjunction with this iC.
Download the license at www.biss-interface.com/BUA