Texas Instruments TLV840EVM, Руководство пользователя, Страница: 9 / 18

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EVM Connectors
9 SNVU704 – February 2020
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Copyright © 2020, Texas Instruments Incorporated
TLV840EVM Voltage Supervisor User Guide
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. All pins of the device are broken out to test points
on the EVM.
Table 2. Test Points
TEST POINT
NUMBER
TEST POINT
SILKSCREEN
LABEL
FUNCTION DESCRIPTION
TP1 VDD Connection to VDD pin Allows user to monitor the VDD pin. The VDD pin
connects to the input power supply.
TP2 CT Connection to CT pin Allows user to monitor the CT pin. This pin charges up
according to the CT pin configuration. The CT
capacitor sets the reset delay.
TP3 RESET Connection to RESET pin Allows user to monitor the RESET output pin.
TP4 MR Connection to MR pin Allows user to monitor the logic level of the manual
reset pin. Logic low on MR forces a reset.
TP5 GND Connection to GND pin. Allows user to connect to the ground plane.
3.2 EVM Jumpers
Table 3 lists the jumpers on the TLV840EVM. As ordered, the EVM will have five jumpers installed.
Table 3. List of Onboard Jumpers
JUMPER DEFAULT
CONNECTION
DESCRIPTION
J1 Shorted
Both pins on J1 are connected together. Connect either pin on jumper J1 to the input
power supply.
J2 Closed
Connect a shunt jumper to jumper J2 to use R1 as the pull-up resistor on the RESET
output pin.
J3 Shorted
Both pins on J3 are connected together. Use either pin on jumper J3 to monitor the
RESET output pin.
J4 Closed (pin 1, pin 2)
Jumper J4 configures the CT pin to set the reset delay. Connect a shunt jumper to pin
1 and pin 2 of jumper J4 to use C2 as the delay capacitor for the CT pin. Connect
shunt jumper to pin 2 and pin 3 of jumper J4 to use C3 as the delay capacitor.
Remove shunt jumper from jumper J4 to set the default fixed delay of 80 µs
(maximum).
J5 Shorted
Both pins on J5 are connected together. Use either pin on jumper J5 as the ground
connection.
J6 Open
Jumper J6 configures the manual reset pin. Remove shunt jumper from J6 and leave
floating for normal operation. Connect shunt jumper to J6 to force a reset. Pin 1 of
jumper J6 can also be connected to a control signal to set the logic level on MR pin. If
pin 1 on jumper J6 is logic low, the device remains in reset.