 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
MC68HC908AP16CFB Datasheet(PDF) 307 Page - Motorola, Inc |
|
|
|||||||||||||||||||||||||||||
MC68HC908AP16CFB Datasheet(HTML) 307 Page - Motorola, Inc |
|
|
307 / 440 page  Serial Peripheral Interface Module (SPI) Resetting the SPI MC68HC908AP Family — Rev. 2.5 Data Sheet MOTOROLA 307 The following sources in the SPI status and control register can generate CPU interrupt requests: • SPI receiver full bit (SPRF) — The SPRF bit becomes set every time a byte transfers from the shift register to the receive data register. If the SPI receiver interrupt enable bit, SPRIE, is also set, SPRF generates an SPI receiver/error CPU interrupt request. • SPI transmitter empty (SPTE) — The SPTE bit becomes set every time a byte transfers from the transmit data register to the shift register. If the SPI transmit interrupt enable bit, SPTIE, is also set, SPTE generates an SPTE CPU interrupt request. 15.9 Resetting the SPI Any system reset completely resets the SPI. Partial resets occur whenever the SPI enable bit (SPE) is low. Whenever SPE is low, the following occurs: • The SPTE flag is set. • Any transmission currently in progress is aborted. • The shift register is cleared. • The SPI state counter is cleared, making it ready for a new complete transmission. • All the SPI port logic is defaulted back to being general-purpose I/O. These items are reset only by a system reset: • All control bits in the SPCR register • All control bits in the SPSCR register (MODFEN, ERRIE, SPR1, and SPR0) • The status flags SPRF, OVRF, and MODF By not resetting the control bits when SPE is low, the user can clear SPE between transmissions without having to set all control bits again when SPE is set back high for the next transmission. Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | 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 |
New Zealand ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
