Electronic Components Datasheet Search
Selected language     English  â–¼


ST7DALI Datasheet(PDF) 85 Page - STMicroelectronics

Part No. ST7DALI
Description  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI, DALI
Download  141 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo 

 85 page
background image
ST7DALI
85/141
SERIAL PERIPHERAL INTERFACE (Cont’d)
11.5.5.4
Single
Master
and
Multimaster
Configurations
There are two types of SPI systems:
– Single Master System
– Multimaster System
Single Master System
A typical single master system may be configured,
using a device as the master and four devices as
slaves (see Figure 51).
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.
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.
Multi-Master System
A multi-master system may also be configured by
the user. Transfer of master control could be im-
plemented using a handshake method through the
I/O ports or by an exchange of code messages
through the serial peripheral interface system.
The multi-master system is principally handled by
the MSTR bit in the SPICR register and the MODF
bit in the SPICSR register.
Figure 51. Single Master / Multiple Slave Configuration
MISO
MOSI
MOSI
MOSI
MOSI
MOSI
MISO
MISO
MISO
MISO
SS
SS
SS
SS
SS
SCK
SCK
SCK
SCK
SCK
5V
Slave
Device
Slave
Device
Slave
Device
Slave
Device
Master
Device
1




Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  48  49  50  51  52  53  54  55  56  57  58  59  60  61  62  63  64  65  66  67  68  69  70  71  72  73  74  75  76  77  78  79  80  81  82  83  84  85  86  87  88  89  90  91  92  93  94  95  96  97  98  99  100   ...More


Datasheet Download



Related Electronics Part Number

Part NumberComponents DescriptionHtml ViewManufacturer
ST7LITE18-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY DATA EEPROM ADC 4 TIMERS SPI 1 2 3 4 5 MoreSTMicroelectronics
ST7LITE08-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY DATA EEPROM ADC TIMERS SPI 1 2 3 4 5 MoreSTMicroelectronics
ST7LITE28-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY DATA EEPROM ADC TIMERS SPI 1 2 3 4 5 MoreSTMicroelectronics
ST7LITE38-BIT MCU WITH SINGLE VOLTAGE FLASH DATA EEPROM ADC TIMERS SPI LINSCI 1 2 3 4 5 MoreSTMicroelectronics
ST72334J8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY ADC 16-BIT TIMERS SPI SCI INTERFACES 1 2 3 4 5 MoreSTMicroelectronics
ST72104G8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY ADC 16-BIT TIMERS SPI I2C INTERFACES 1 2 3 4 5 MoreSTMicroelectronics
ST7262LOW SPEED USB 8-BIT MCU WITH 3 ENDPOINTS FLASH OR ROM MEMORY LVD WDG 10-BIT ADC 2 TIMERS SCI SPI 1 2 3 4 5 MoreSTMicroelectronics
ST72260G8-BIT MCU WITH FLASH OR ROM MEMORY ADC TWO 16-BIT TIMERS I2C SPI SCI INTERFACES 1 2 3 4 5 MoreSTMicroelectronics
ST72311R8-BIT MCU WITH NESTED INTERRUPTS EEPROM ADC 16-BIT TIMERS 8-BIT PWM ART SPI SCI CAN INTERFACES 1 2 3 4 5 MoreSTMicroelectronics

Link URL

Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Bookmark   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com 2003 - 2017    


Mirror Sites
English : Alldatasheet.com  , Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp  |   Russian : Alldatasheetru.com
Korean : Alldatasheet.co.kr   |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com  |   Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl