ST72325 STMICROELECTRONICS [STMicroelectronics], ST72325 Datasheet - Page 92
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: 92 of 193
- Download datasheet (2Mb)
ST72325
10.5 SERIAL PERIPHERAL INTERFACE (SPI)
10.5.1 Introduction
The Serial Peripheral Interface (SPI) allows full-
duplex, synchronous, serial communication with
external devices. An SPI system may consist of a
master and one or more slaves however the SPI
interface can not be a master in a multi-master
system.
10.5.2 Main Features
■
■
■
■
■
■
■
■
■
Figure 56. Serial Peripheral Interface Block Diagram
92/193
Full duplex synchronous transfers (on 3 lines)
Simplex synchronous transfers (on 2 lines)
Master or slave operation
Six master mode frequencies (f
f
SS Management by software or hardware
Programmable clock polarity and phase
End of transfer interrupt flag
Write collision, Master Mode Fault and Overrun
flags
MOSI
MISO
CPU
SCK
SS
/2 max. slave mode frequency (see note)
SOD
bit
SPIDR
8-Bit Shift Register
Read Buffer
SERIAL CLOCK
CPU
GENERATOR
CONTROL
MASTER
/4 max.)
Data/Address Bus
Read
Write
Note: In slave mode, continuous transmission is
not possible at maximum frequency due to the
software overhead for clearing status flags and to
initiate the next transmission sequence.
10.5.3 General Description
Figure 56
(SPI) block diagram. There are 3 registers:
The SPI is connected to external devices through
4 pins:
– SPI Control Register (SPICR)
– SPI Control/Status Register (SPICSR)
– SPI Data Register (SPIDR)
– MISO: Master In / Slave Out data
– MOSI: Master Out / Slave In data
– SCK: Serial Clock out by SPI masters and in-
put by SPI slaves
7
SPIE
SPIF WCOL
7
SPE
shows the serial peripheral interface
CONTROL
SPR2
OVR
STATE
SPI
Interrupt
request
MODF
MSTR
CPOL
0
CPHA
SOD
SS
SPICR
SPICSR
SSM
SPR1
0
1
SPR0
SSI
0
0
Related parts for ST72325
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
THYRISTORS
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
ADJUSTABLE INVERTING NEGATIVE OUTPUT CURRENT MODE PWM REGULATORS
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
0.25A SCRs
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
0.8A SCRs
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
Smartcard MCU With 4 additional I/0
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
SERIAL 2K (256 x 8) EEPROM
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
Search -----> STP10NB50FP
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
Search ---> STP12NB30
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
Search -----> STP13NK50Z
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
(MSS40 / MSS50) BACK TO BACK SCR MODULE
Manufacturer:
ST Microelectronics
Datasheet:
Part Number:
Description:
Dmos Programmable High Speed Unipolar Stepper Motor Driver
Manufacturer:
ST Microelectronics, Inc.
Datasheet:
Part Number:
Description:
LOW Votage Telephone Speech Circuit
Manufacturer:
ST Microelectronics, Inc.
Datasheet:
Part Number:
Description:
Technical Article
Manufacturer:
ST Microelectronics, Inc.
Datasheet:
Part Number:
Description:
Thyristormodule
Manufacturer:
ST Microelectronics, Inc.
Datasheet:
Part Number:
Description:
SCR
Manufacturer:
ST Microelectronics
Datasheet: