 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
Z80 Datasheet(PDF) 33 Page - Zilog, Inc. |
|
|
|||||||||||||||||||||||||||||
Z80 Datasheet(HTML) 33 Page - Zilog, Inc. |
|
|
33 / 330 page  < %27 2GTKRJGTCNU 7UGT /CPWCN UM008101-0601 Counter/Timer Channels an interrupt from any CTC channel. Therefore, this signal blocks lower- priority devices from interrupting while a higher-priority interrupting device is being serviced by the CPU. INT Interrupt Request (output, open-drain, active Low). This signal goes true when a CTC channel, which has been programmed to enable interrupts, has a zero-count condition in its down-counter. RESET Reset (input, active Low). This signal stops all channels from counting and resets interrupt enable bits in all control registers, thereby disabling CTC-generated interrupts. The ZC/TO and INT outputs go inactive, IEO reflects IEI, and the CTC’s data bus output drivers go to the high- impedance state. CLK/TRG3–CLK/TRG0 External Clock/Timer Trigger (input, user-selectable active High or Low). Four CLK/TRG pins correspond to the four independent CTC channels. In the Counter mode, every active edge on this pin decrements the down-counter. In the TIMER mode, an active edge on this pin initiates the timing function. The user may select the active edge to be either rising or falling. ZC/TO2-AC/TO0 Zero Count/Timeout (output, active High). Three ZC/TO pins correspond to CTC Channels 2 through 0. (Because of package pin limitations Channel 3 has no ZC/TO pin.) In either COUNTER mode or TIMER mode, when the down-counter decrements to zero, an active High pulse appears at this pin. |
|
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
