Texas Instruments LP877451Q1EVM, Руководство пользователя

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Table 3-2. Configuration Jumpers (continued)
Jumper/Connector Number Jumper/Connector Name Configuration Description
J8 EN_LVPMIC
Option 1: Open (Default)
PMIC Enable signal from 3.3 V
Input. J5 must be closed
Option 2: Pins 1 and 2 PMIC Enable signal path from
GUI interface. J5 must be open if
this Option is used
Option 3: Pins 2 and 3
PMIC Enable signal path from
pre-regulator PGOOD signal. J5
must be open if this Option is
used
J9 PVIN_3V3
Option 1: Pins 1/3 and 2/4
3V3_PREREG (Default)
PVIN_3V3 connected to pre-
regulator output. J9-Option-2
must be open and J11 must be
open
Option 2: Pins 5/7 and 6/8 3V3_PS
PVIN_3V3 connected to external
3.3V supply (J1). J9-Option-1
must be open and J11 must be
open
J10 SYNCCLKIN Pins 1 and 2 (Default)
SYNCCLKIN pin connected to
MCU clock port (used for testing
external clock input signal)
J11 3V3_USB
Open (Default)
Closed
PMIC input supply (PVIN_3V3)
is generated from USB supply.
J9 jumpers must be open if this
jumper is closed
J13 CS_SPI_WD
Pins 1 and 2 (Default)
Connects PMIC CS_SPI signal to
MCU CS_SPI port directly
Pins 2 and 3
Connects PMIC CS_SPI signal to
MCU CS_SPI port through a level
shifter (series resistors must be
mounted if this option is used)
J14 WD_DIS
Closed (Default)
Pull down resistor in CS_SPI pin
enabled which will disable Q&A
watchdog during the PMIC power
up. For this to be effective, USB
cable should not be connected
to the EVM when the PMIC
is powered up. If USB cable
is connected before PMIC is
powered up, USB MCU will drive
this pin high (through J13) during
the startup
Open
Q&A watchdog disable function
not active during the PMIC power
up
J15 VMON1_GPO1
Pins 1 and 2 (Default: open)
Connects PMIC VMON1 signal to
MCU port directly
Pins 2 and 3 (Default: open)
Connects PMIC VMON1 signal
to MCU port through level shifter
(series resistors must be mounted
if this option is used)
J16 nINT
Pins 1 and 2 (Default)
Connects PMIC nINT signal to
MCU port directly
Pins 2 and 3
Connects PMIC nINT signal to
MCU port through level shifter
(series resistors must be mounted
if this option is used)
www.ti.com Jumpers and connectors
SNVU769 – SEPTEMBER 2021
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LP877451Q1EVM Evaluation Module 5
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