Electronic Components Datasheet Search |
|
TPS3813K33QDBVRQ1 Datasheet(PDF) 4 Page - Texas Instruments |
|
|
TPS3813K33QDBVRQ1 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 16 page Window Frame to Reset the WDI tboundary, min tboundary, max tboundary, typ Detection of Rising Edge WDI t twindow, min twindow, typ twindow, max TPS3813J25-Q1, TPS3813L30-Q1 TPS3813K33-Q1, TPS3813I50-Q1 SPRS288B – MAY 2008 – REVISED APRIL 2012 www.ti.com DETAILED DESCRIPTION Implemented Window-Watchdog Settings There are two different ways to set up the watchdog window. The first way is to use the implemented timing, which is a default setting. Or, the default settings can be activated by wiring the WDT and WDR pin to VDD or GND. There are four different timings available with these settings, as shown in the following table. SELECTED OPERATION MODE WINDOW FRAME LOWER WINDOW FRAME Max = 0.3 s Max = 9.46 ms WDR = 0 V Typ = 0.25 s Typ = 7.86 ms Min = 0.2 s Min = 6.27 ms WDT = 0 V Max = 0.3 s Max = 2.43 ms WDR = VDD Typ = 0.25 s Typ = 2 ms Min = 0.2 s Min = 1.58 ms Max = 3 s Max = 93.8 ms WDR = 0 V Typ = 2.5 s Typ = 78.2 ms Min = 2 s Min = 62.5 ms WDT = VDD Max = 3 s Max = 23.5 ms WDR = VDD Typ = 2.5 s Typ = 19.6 ms Min = 2 s Min = 15.6 ms To visualize the values named in the table, a timing diagram is shown in Figure 3. It is used to describe the upper and lower boundary settings. For an application, the important boundaries are the tboundary,max and twindow,min. Within these values, the watchdog timer should be retriggered to avoid a timeout condition or a boundary violation in the event of a trigger pulse in the lower boundary. The values in the table above are typical and worst case conditions. They are valid over the whole temperature range of –40°C to 125°C. In the shaded area of Figure 3, it cannot be predicted if the device will detect a violation or not and release a reset. This is also the case between the boundary tolerance of tboundary,min and tboundary,max as well as between twindow,min and twindow,max. It is important to set up the trigger pulses accordingly to avoid violations in these areas. Figure 3. Upper and Lower Boundary Visualization Timing Rules of Window-Watchdog After the reset of the supervisor is released, the lower boundary of the first WDI window is disabled. However, after the first WDI pulse low-to-high transition is detected, the lower boundary function of the window is enabled. All further WDI pulses need to fit into the configured window frame. 4 Submit Documentation Feedback Copyright © 2008–2012, Texas Instruments Incorporated |
Similar Part No. - TPS3813K33QDBVRQ1 |
|
Similar Description - TPS3813K33QDBVRQ1 |
|
|
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 |