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Test Setup
2.6.2 Diagnostics Page
From the Diagnostics page (see
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
8
LP8864 Evaluation Module
Figure
2-7), the user can read back the following diagnostics register values
Figure 2-7. LP8864VM Diagnostics Page
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SNVU731 – NOVEMBER 2020
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