 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
W741E20X Datasheet(PDF) 11 Page - Winbond |
|
||||||||||||||||||||||||||||||
W741E20X Datasheet(HTML) 11 Page - Winbond |
|
|
11 / 84 page  Preliminary W741E20X Publication Release Date: March 1998 - 11 - Revision A1 Timer/Counter Timer 0 (TM0) Timer 0 (TM0) is a programmable 8-bit binary down-counter. The specified value can be loaded into TM0 by executing the MOV TM0L(TM0H), R or MOV TM0, #I instruction. When the MOV TM0L (TM0H), R instructions are executed, the TM0 will stop down-counting (if the TM0 is down-counting), the MR0.3 will be reset to 0, and the specified value is loaded into TM0. If MR0.3 is set to 1, the event flag 1 (EVF.1) is reset and the TM0 starts to count. When it decrements to FFH, Timer 0 stops operating and generates an underflow (EVF.1 = 1). The interrupt is executed if the Timer 0 interrupt enable flag has been set (IEF.1 = 1); and the hold state is terminated if the hold release enable flag 1 has been set (HEF.1 = 1). The Timer 0 clock input can be set as FOSC/1024 or FOSC/4 by setting MR0.0 to 1 or by resetting MR0.0 to 0. The default timer value is FOSC/4. The organization of Timer 0 is shown in Figure 5. If the Timer 0 clock input is Fosc/4, then: Desired time 0 interval = (preset value +1) × 4 × 1/Fosc If the Timer 0 clock input is Fosc/1024, then: Desired time 0 interval = (preset value +1) × 1024 × 1/Fosc Preset value: Decimal number of Timer 0 preset value Fosc: Clock oscillation frequency Fosc/4 Fosc/1024 Enable Disable 1. Reset 2. CLR EVF, #02H 8-bit Binary Down Counter S R Q HEF.1 IEF.1 Hold mode release (HCF.1) Timer 0 interrupt (INT1) 1. Reset 2. CLR EVF, #02H EVF.1 MR0.0 (Timer 0) 1. Set MR0.3 to 1 2. MOV TM0, #I 3. Reset MR0.3 to 0 3. Set MR0.3 to 1 4. MOV TM0, #I 4 4 MOV TM0H, R MOV TM0L, R 4. MOV TM0L, R or MOV TM0H, R 8 MOV TM0, #I Figure 5. Organization of Timer 0 Timer 1 (TM1) Timer 1 (TM1) is also a programmable 8-bit binary down counter, as shown in Figure 6. Timer 1 can be used as a counter to count external events or to output an arbitrary frequency to the MFP pin. The input clock of Timer 1 can be one of three sources: Fosc/64, Fosc, or an external clock from the RC.0 |
Similar Part No. - W741E20X |
|
Similar Description - W741E20X |
|
|
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
