STEVAL-IFS012V1 STMicroelectronics, STEVAL-IFS012V1 Datasheet - Page 100
STEVAL-IFS012V1
Manufacturer Part Number
STEVAL-IFS012V1
Description
BOARD ST72651AR6/STTS75/STLM20
Manufacturer
STMicroelectronics
Specifications of STEVAL-IFS012V1
Sensor Type
Temperature
Sensing Range
Depends on IC
Interface
I²C, USB
Sensitivity
Depends on IC
Voltage - Supply
5V
Embedded
Yes, MCU, 8-Bit
Utilized Ic / Part
ST72F651AR6, STTS75, STLM20
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-8419
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ST72651AR6
SERIAL PERIPHERAL INTERFACE (Cont’d)
11.6.5.4 Single Master System
A typical single master system may be configured,
using an MCU as the master and four MCUs as
slaves (see
The master device selects the individual slave de-
vices by using four pins of a parallel port to control
the four SS pins of the slave devices.
The SS pins are pulled high during reset since the
master device ports will be forced to be inputs at
that time, thus disabling the slave devices.
Figure 61. Single Master / Multiple Slave Configuration
100/161
V
DDF
Figure
MOSI
SS
SCK
SCK
MOSI
MCU
Master
Slave
MCU
61).
MISO
MISO
SS
MOSI
SCK
MCU
Slave
Doc ID 7215 Rev 4
MISO
SS
Note: To prevent a bus conflict on the MISO line
the master allows only one active slave device
during a transmission.
For more security, the slave device may respond
to the master with the received data byte. Then the
master will receive the previous byte back from the
slave device if all MISO and MOSI pins are con-
nected and the slave has not written to its SPIDR
register.
Other transmission security methods can use
ports for handshake lines or data bytes with com-
mand fields.
MOSI
SCK
MCU
Slave
MISO
SS
MOSI
SCK
MCU
Slave
MISO
SS
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