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 OUT1-4 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
Figure 2-7. LP8864VM Diagnostics Page
Test Setup
8
LP8864 Evaluation Module
SNVU731 – NOVEMBER 2020
Copyright © 2020 Texas Instruments Incorporated
