 |
поискавой системы для электроныых деталей |
|
|
поискавой системы для электроныых деталей |
|
COP888EB датащи(PDF) 41 Page - National Semiconductor (TI) |
|
|
|
|||||||||||||||||||||||||||||
COP888EB датащи(HTML) 41 Page - National Semiconductor (TI) |
|
|
41 / 75 page  Interrupts (Continued) VIS Execution When the VIS instruction is executed it activates the arbitra- tion logic. The arbitration logic generates an even number between E0 and FE (E0, E2, E4, E6 etc...) depending on which active interrupt has the highest arbitration ranking at the time of the 1st cycle of VIS is executed. For example, if the software trap interrupt is active, FE is generated. If the external interrupt is active and the software trap interrupt is not, then FA is generated and so forth. If the only active inter- rupt is software trap, than E0 is generated. This number re- places the lower byte of the PC. The upper byte of the PC re- mains unchanged. The new PC is therefore pointing to the vector of the active interrupt with the highest arbitration rank- ing. This vector is read from program memory and placed into the PC which is now pointed to the 1st instruction of the service routine of the active interrupt with the highest arbitra- tion ranking. Figure 32 illustrates the different steps performed by the VIS instruction. Figure 33 shows a flowchart for the VIS instruc- tion. The non-maskable interrupt pending flag is cleared by the RPND (Reset Non-Maskable Pending Bit) instruction (under certain conditions) and upon RESET. DS012837-29 FIGURE 32. VIS Operation www.national.com 41 |
|
ссылки URL |
| Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | Ссылка на техническое описание | обмен ссыками | поиск по производителю 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 |
Russian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
