Test Setup
7
SNVU685A – December 2019 – Revised June 2020
Copyright © 2019–2020, Texas Instruments Incorporated
LP8866EVM User's Guide
Figure 6. LP8866EVM Monitor Faults Page
2.6.2
Diagnostics Page
From the Diagnostics page (see
), the user can read back the following diagnostics register
values and corresponding device status.
•
FSM_LIVE_STATUS: current status of the functional state machine
•
PWM_INPUT_STATUS: 16-bit value for detected duty cycle of PWM input signal
•
PWM_OUTPUT_STATUS: 16-bit value for configured duty cycle of PWM output signal
•
LED_CURRENT_STATUS: 12-bit current DAC code that brightness path is driving to OUT1-6 output
•
VBOOST_STATUS: 11-bit boost voltage code that adaptive voltage control loop sending to analog
boost block
•
AUTO_PWM_FREQ_SEL: LED PWM frequency value from PWM_SEL resistor detection
•
AUTO_LED_STRING_CFG: LED string configuration from LED_SET resistor detection
•
AUTO_BOOST_FREQ_SEL: boost switching frequency value from PWM_FSET resistor detection
•
MODE_SEL: LED dimming mode value from MODE resistor detection