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Texas Instruments MSA011 Скачать руководство пользователя страница 9

EVM Setup and Operation

9

SGLU009 – November 2016

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Copyright © 2016, Texas Instruments Incorporated

TPS382-Q1EVM (MSA011) Voltage Supervisor with Watchdog Timer User

Guide

4.2

Manual Reset (MR)

The TPS3820-Q1, TPS3823-Q1, TPS3825-Q1, and TPS3828-Q1 devices offer a manual reset pin. The
EVM uses a 3-pin header for the MR pin of each device, and a jumper to connect the MR pin to VDD or
GND. When MR is pulled low, the RESET output will be asserted (low for RESET pins and high for
RESET pins). When this pin is pulled high or left floating, the reset output will be dependent on the supply
voltage and WDI inputs on devices with WDI pin.

Figure 14. TPS3820-33-Q1 RESET Asserted Due to MR

Being Pulled Low

Figure 15. TPS3820-33-Q1 RESET De-Asserted to MR

Being Pulled High, With Delay t

d

Figure 16. TPS3823-25-Q1 RESET De-Asserted to MR Being Pulled High, With Delay t

d

4.3

Watchdog Input (WDI)

The TPS3820-Q1, TPS3823-Q1, TPS3824-Q1, and TPS3828-Q1 have a watchdog to monitor a
microcontroller. The EVM offers a 2-pin header for the WDI pin for each of these devices, and both header
pins are connected to the device WDI pin. The device requires a positive or negative transition on the WDI
pin within the t

tout

time to avoid asserting the reset. If the device does not receive a transition on WDI, it will

assert the reset output. When using the watchdog, the WDI pin should not exceed VDD by more than
0.3 V. When unused, the WDI pin can be left floating.

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Содержание MSA011

Страница 1: ...mbly 5 4 Component Placement Bottom Assembly 5 5 Layout Top 5 6 Layout Bottom 5 7 Top Layer 5 8 Bottom Layer 5 9 Top Solder Mask 6 10 Bottom Solder Mask 6 11 TPS3820 33 Q1 RESET Asserted Due to Falling VCC 8 12 TPS3820 33 Q1 RESET De Asserted Due to Rising VCC With Delay td 8 13 TPS3828 33 Q1 RESET De Asserted Due to Rising VCC With Delay td 8 14 TPS3820 33 Q1 RESET Asserted Due to MR Being Pulled...

Страница 2: ...e devices have separate supply connections separate input and output lines and all devices share a common ground This allows the user to test multiple devices simultaneously with different supply voltages and different input conditions Test points are provided to give the user access to multiple ground points Figure 1 TPS382 Q1EVM Board 1 1 Related Documentation TPS382x xx Q1 Voltage Monitor With ...

Страница 3: ... and Layout 3 SGLU009 November 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated TPS382 Q1EVM MSA011 Voltage Supervisor with Watchdog Timer User Guide 2 1 TPS382 Q1EVM Schematic Figure 2 TPS382 Q1EVM Schematic ...

Страница 4: ...onnector Solutions J19 1 Header 2 54mm 1x2 Tin Black TH Header 2 54mm 2x1 TH PEC01DAAN Sullins Connector Solutions R1 1 10k RES 10 k 5 0 1 W 0603 0603 CRCW060310K0JNEA Vishay Dale SH J1 SH J2 SH J3 SH J4 SH J5 5 1x2 Shunt 100mil Gold plated Black Shunt 969102 0000 DA 3M TP1 TP2 TP3 TP4 TP5 5 Test Point Compact SMT Testpoint_Keystone_Comp act 5016 Keystone U1 1 Voltage Monitor With Watchdog Timer D...

Страница 5: ...t Placement Figure 3 and Figure 4 top and bottom assemblies of the printed circuit board PCB show the component placement on the EVM Figure 5 and Figure 6 show the top and bottom layouts Figure 7 and Figure 8 show the top and bottom layers and Figure 9 and Figure 10 show the top and bottom solder masks of the EVM Figure 3 Component Placement Top Assembly Figure 4 Component Placement Bottom Assembl...

Страница 6: ...igure 10 Bottom Solder Mask 3 EVM Connectors This section describes the connectors jumpers and test points on the EVM as well as how to connect set up and properly use the EVM Each device has an independent supply connection but all grounds are connected on the board 3 1 EVM Test Points Table 2 lists the test points and functional descriptions Table 2 Test Points Test Point Function Description Nu...

Страница 7: ...S3828 33 Q2 Shorted Enables the pullup to VDD for the open drain reset output To use a different pullup voltage remove the shunt from J19 and supply a different voltage to J19 pin 2 3 3 EVM Input and Output Connectors The following 2 pin headers are input and output connecters for each device Table 4 List of Input and Output Connectors Jumper Device Description J1 TPS3820 33 Q1 Supply voltage for ...

Страница 8: ...other on the EVM so all devices can be simultaneously powered at different voltages Table 5 lists the nominal supply voltage and typical reset threshold voltage for each device The supply voltage on any device should not exceed 5 5V Table 5 Nominal Supply and Typical Threshold Voltages Device Nominal Supply Voltage V Typical Threshold Voltage V TPS3820 33 Q1 3 3 2 93 TPS3828 33 Q1 TPS3823 25 Q1 2 ...

Страница 9: ...nputs on devices with WDI pin Figure 14 TPS3820 33 Q1 RESET Asserted Due to MR Being Pulled Low Figure 15 TPS3820 33 Q1 RESET De Asserted to MR Being Pulled High With Delay td Figure 16 TPS3823 25 Q1 RESET De Asserted to MR Being Pulled High With Delay td 4 3 Watchdog Input WDI The TPS3820 Q1 TPS3823 Q1 TPS3824 Q1 and TPS3828 Q1 have a watchdog to monitor a microcontroller The EVM offers a 2 pin h...

Страница 10: ...3824 Q1 and TPS3825 Q1 offer an additional active high RESET signal The EVM has a 2 pin header for each RESET and RESET pin with both header pins shorted together The reset signal will be asserted low for RESET pins and high for RESET pins when the supply voltage drops below the threshold voltage when MR is pulled low or when a trigger is not detected on the WDI pin for time ttout When VDD is high...

Страница 11: ... are returned during the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repair such EVM or provide replacements Repaired EVMs shall be warranted for the remainder of the original warranty period Replaced EVMs shall be warranted for a new full ninety 90 day wa...

Страница 12: ... by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this list having a gain greater than the maximum gain indicated for that type are strictly prohibited for use with this device Concernant les EVMs avec antennes détachables Conformément à la rég...

Страница 13: ...connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation even with the inputs and outputs kept within the specified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors cur...

Страница 14: ...F REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE LOSS OF DATA OR BUSINESS INTERRUPTION NO CLAIM SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED 8 2 Specific Limitations IN NO EVENT SHALL T...

Страница 15: ...esponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

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