 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
M37702S1AFP Datasheet(PDF) 21 Page - Renesas Technology Corp |
|
|
|||||||||||||||||||||||||||||
M37702S1AFP Datasheet(HTML) 21 Page - Renesas Technology Corp |
|
|
21 / 60 page  20 MITSUBISHI MICROCOMPUTERS M37702M2AXXXFP, M37702M2BXXXFP M37702S1AFP, M37702S1BFP SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER (3) One-shot pulse mode [10] Figure 20 shows the bit configuration of the timer Ai mode register during one-shot pulse mode. In one-shot pulse mode, bit 0 and bit 5 must be “0” and bit 1 and bit 2 must be “1”. The trigger is enabled when the count start flag is “1”. The trigger can be generated by software or it can be input from the TAiIN pin. Software trigger is selected when bit 4 is “0” and the input signal from the TAiIN pin is used as the trigger when it is “1”. Bit 3 is used to determine whether to trigger at the fall of the trig- ger signal or at the rise. The trigger is at the fall of the trigger signal when bit 3 is “0” and at the rise of the trigger signal when it is “1”. Software trigger is generated by setting the bit in the one-shot start flag corresponding to each timer. Figure 21 shows the bit configuration of the one-shot start flag. As shown in Figure 22, when a trigger signal is received, the counter counts the clock selected by bits 6 and 7. If the contents of the counter is not 000016, the TAiOUT pin goes “H” when a trigger signal is received. The count direction is decre- ment. When the counter reaches 000116, The TAiOUT pin goes “L” and count is stopped. The contents of the reload register is transferred to the counter. At the same time, and interrupt request signal is generated and the interrupt request bit in the timer Ai interrupt control register is set. This is repeated each time a trigger signal is received. The output pulse width is ! (counter’s value at the time of trigger). If the count start flag is “0”, TAiOUT goes “L”. Therefore, the value corresponding to the desired pulse width must be written to timer Ai before setting the timer Ai count start flag. As shown in Figure 23, a trigger signal can be received before the operation for the previous trigger signal is completed. In this case, the contents of the reload register is transferred to the counter by the trigger and then that value is decremented. Except when retriggering while operating, the contents of the re- load register is not transferred to the counter by triggering. When retriggering, there must be at least one timer count source cycle before a new trigger can be issued. Data write is performed to the same way as for timer mode. When data is written in timer Ai halted, it is also written to the reload reg- ister and the counter. When data is written to timer Ai which is busy, the data is written to the reload register, but not to the counter. The counter is reloaded with new data from the reload register at the next reload time. Undefined data is read when timer Ai is read. Fig. 20 Timer Ai mode register bit configuration during one- shot pulse mode Fig. 21 One-shot start flag bit configuration 1 pulse frequency of the selected clock Timer A0 mode register 5616 Timer A1 mode register 5716 Timer A2 mode register 5816 Timer A3 mode register 5916 Timer A4 mode register 5A 16 Addresses 1 : Always “1” in one-shot pulse mode 0 ! : Software trigger 1 0 : Trigger at the falling edge of TAiIN input 1 1 : Trigger at the rising edge of TAiIN input 0 : Always “0” in one-shot pulse mode Clock source selection 0 0 : Select f2 0 1 : Select f16 1 0 : Select f64 1 1 : Select f512 1 0 : Always “10” in one-shot pulse mode 7 6 543 2 1 0 01 0 1 70 65 432 1 One-shot start flag Timer A0 one-shot start flag Timer A4 one-shot start flag Timer A1 one-shot start flag Timer A2 one-shot start flag Timer A3 one-shot start flag Address 4216 |
|
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
