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Using EVM without MCU (MSP430), Standalone Mode
58
SNVU382A – April 2014 – Revised June 2014
Copyright © 2014, Texas Instruments Incorporated
Quick Start Guide
Figure D-3. Interface Jumpers
•
FAULT:
The LP8860-Q1 output indicates if fault has been detected. Note: when I
2
C/SPI interface is
not used, reason for fault condition cannot be checked from the LP8860-Q1 register.
•
SYNC, VSYNC:
connect to ground (not used in this example).
•
MISO:
leave floating (SPI interface output, not used in this example).
•
SDA, SCL:
connect to ground (I
2
C is not used).
•
NSS:
input for clearing faults.
•
PWM:
connect external PWM signal (100 - 500 Hz) for brightness control.
•
EN:
enable for the LP8860-Q1.
•
IF:
connect to ground by connecting J20 to “Manual” and J18 to “I2C” position.
Signal level for FAULT, NSS, and PWM should be the same as EN (which defines the IO level of the
LP8860-Q1). The EN level can be from 1.8 V up to the VDD of the LP8860-Q1.