 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
Z80 Datasheet(PDF) 35 Page - Zilog, Inc. |
|
|
|||||||||||||||||||||||||||||
Z80 Datasheet(HTML) 35 Page - Zilog, Inc. |
|
|
35 / 330 page  < %27 2GTKRJGTCNU 7UGT /CPWCN UM008101-0601 Counter/Timer Channels used in applications where this output pulse is not required. Additionally, if the channel is pre-programmed by bit 7 of the channel control word, an interrupt request sequence is generated. For more details, see the CTC Interrupt Servicing section The zero-count condition also results in the automatic reload of the down- counter with the original time constant data word in the Time Constant register. There is no interruption in the sequence of continued down- counting. If the Time Constant register is written with a new Time Constant Data Word while the down-counter is decrementing, the present count is completed before the new time constant is loaded into the down-counter. CTC TIMER Mode In CTC TIMER mode, the CTC generates timing intervals that are an integer value of the system clock period. This mode is programmed for a channel when its Channel Control Word is written with bit 6 reset. The channel then may be used to measure intervals of time based on the System clock period. The System clock is fed through the prescaler and the down- counter. Depending on the pre programmed bit 5 in the Channel Control Word, the prescaler divides the System clock by a factor of 16 or 256. The output of the prescaler is then used as a clock to decrement the down- counter, which may be pre programmed with any time constant integer between 1 and 256. The time constant is automatically reloaded into the down-counter at each zero-counter condition. At zero count, the channel’s Time Cut (ZC/TO) output (which is the output of the down-counter) is pulsed, resulting in a uniform pulse train of the precise period given by the product as shown below. 8- $ Where tc is the System clock, P is the prescaler factor of 16 or 256, and TC is the pre-programmed time constant. |
|
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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
