 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
ST72104GX-AUTO Datasheet(PDF) 68 Page - STMicroelectronics |
|
||||||||||||||||||||||||||||||
ST72104GX-AUTO Datasheet(HTML) 68 Page - STMicroelectronics |
|
|
68 / 135 page  ST72104Gx-Auto, ST72215Gx-Auto, ST72216Gx-Auto, ST72254Gx-Auto 68/135 SERIAL PERIPHERAL INTERFACE (Cont’d) 11.3.4.7 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 an MCU as the master and four MCUs as slaves (see Figure 41). 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 its DR regis- ter. Other transmission security methods can use ports for handshake lines or data bytes with com- mand fields. Multimaster System A multimaster 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 CR register and the MODF bit in the SR register. Figure 41. Single Master Configuration MISO MOSI MOSI MOSI MOSI MOSI MISO MISO MISO MISO SS SS SS SS SS SCK SCK SCK SCK SCK 5V Slave MCU Slave MCU Slave MCU Slave MCU Master MCU |
Similar Part No. - ST72104GX-AUTO |
|
Similar Description - ST72104GX-AUTO |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
