ST72325 STMICROELECTRONICS [STMicroelectronics], ST72325 Datasheet - Page 93
![no-image](/images/no-image-200.jpg)
ST72325
Manufacturer Part Number
ST72325
Description
8-BIT MCU WITH 16 TO 60K FLASH/ROM, ADC, CSS, FIVE TIMERS, SPI, SCI, I2C INTERFACE
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.ST72325.pdf
(193 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
- Current page: 93 of 193
- Download datasheet (2Mb)
SERIAL PERIPHERAL INTERFACE (Cont’d)
10.5.3.1 Functional Description
A basic example of interconnections between a
single master and a single slave is illustrated in
Figure
The MOSI pins are connected together and the
MISO pins are connected together. In this way
data is transferred serially between master and
slave (most significant bit first).
Figure 57. Single Master/ Single Slave Application
– SS: Slave select:
This input signal acts as a ‘chip select’ to let
the SPI master communicate with slaves indi-
vidually and to avoid contention on the data
lines. Slave SS inputs can be driven by stand-
ard I/O ports on the master MCU.
57.
MSBit
8-BIT SHIFT REGISTER
GENERATOR
CLOCK
SPI
MASTER
LSBit
SCK
MOSI
SS
MISO
+5V
The communication is always initiated by the mas-
ter. When the master device transmits data to a
slave device via MOSI pin, the slave device re-
sponds by sending data to the master device via
the MISO pin. This implies full duplex communica-
tion with both data out and data in synchronized
with the same clock signal (which is provided by
the master device via the SCK pin).
To use a single data line, the MISO and MOSI pins
must be connected at each node ( in this case only
simplex communication is possible).
Four possible data/clock timing relationships may
be chosen (see
must be programmed with the same timing mode.
MISO
MOSI
SCK
SS
Figure
8-BIT SHIFT REGISTER
MSBit
Not used if SS is managed
by software
60) but master and slave
SLAVE
LSBit
ST72325
93/193
Related parts for ST72325
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![TYN058](/images/no-image3.png)
Part Number:
Description:
THYRISTORS
Manufacturer:
ST Microelectronics
Datasheet:
![ST755](/images/no-image3.png)
Part Number:
Description:
ADJUSTABLE INVERTING NEGATIVE OUTPUT CURRENT MODE PWM REGULATORS
Manufacturer:
ST Microelectronics
Datasheet:
![P0102BL5AA4](/images/no-image3.png)
Part Number:
Description:
0.25A SCRs
Manufacturer:
ST Microelectronics
Datasheet:
![P0102DN5AA4](/images/no-image3.png)
Part Number:
Description:
0.8A SCRs
Manufacturer:
ST Microelectronics
Datasheet:
![ST19AF08](/images/no-image3.png)
Part Number:
Description:
Smartcard MCU With 4 additional I/0
Manufacturer:
ST Microelectronics
Datasheet:
![ST24C02](/images/no-image3.png)
Part Number:
Description:
SERIAL 2K (256 x 8) EEPROM
Manufacturer:
ST Microelectronics
Datasheet:
![P10NB50FP](/images/no-image3.png)
Part Number:
Description:
Search -----> STP10NB50FP
Manufacturer:
ST Microelectronics
Datasheet:
![P12NB30](/images/no-image3.png)
Part Number:
Description:
Search ---> STP12NB30
Manufacturer:
ST Microelectronics
Datasheet:
![P13NK50Z](/images/no-image3.png)
Part Number:
Description:
Search -----> STP13NK50Z
Manufacturer:
ST Microelectronics
Datasheet:
![MSS50](/images/no-image3.png)
Part Number:
Description:
(MSS40 / MSS50) BACK TO BACK SCR MODULE
Manufacturer:
ST Microelectronics
Datasheet:
![L6223A](/images/no-image3.png)
Part Number:
Description:
Dmos Programmable High Speed Unipolar Stepper Motor Driver
Manufacturer:
ST Microelectronics, Inc.
Datasheet:
![L3280](/images/no-image3.png)
Part Number:
Description:
LOW Votage Telephone Speech Circuit
Manufacturer:
ST Microelectronics, Inc.
Datasheet:
![TA235](/images/no-image3.png)
Part Number:
Description:
Technical Article
Manufacturer:
ST Microelectronics, Inc.
Datasheet:
![MSS40_1](/images/no-image3.png)
Part Number:
Description:
Thyristormodule
Manufacturer:
ST Microelectronics, Inc.
Datasheet:
![TYN0510](/images/no-image3.png)
Part Number:
Description:
SCR
Manufacturer:
ST Microelectronics
Datasheet: