Datasheet

PRODUCTPREVIEW
Pull WAKEUP = HIGH
Pull PWRUP= HIGH
Write HiZ = 1
Device enters ACTIVE mode
All power rails are up except VCOM
VCOM pin is in HiZ state
Processor drives panel with NULL waveform
Write ACQ = 1 Starts A/D conversion
Wait for ACQC interrupt
Indicates A/D conversion is complete
If AVG[1:0] is <> 00, interrupt is issed
after all conversions are complete and
average has been calcutated.
Read result from VCOM1/2
registers
Pull PWRUP= LOW
Write HiZ = 0
Check result and decide to keep the
value or repeat measurment.
Device enters STANDBY mode
Write PROG= 1
Starts the EEPROM programming cycle.
Power must not be interrupted.
Wait for PRGC interrupt Indicates programming is complete
Pull WAKEUP = LOW Device enters SLEEP mode
Pull WAKEUP = HIGH Device enters STANDBY mode
Read VCOM[8:0]
Compare against written value to
confirm new default has been
programmed correctly.
SETUP
MEASUREMENT
PROGRAMMING
VERIFICATION
TPS65186
SLVSB04 –JULY 2011 www.ti.com
Figure 26. VCOM Calibration Flow
20 Copyright © 2011, Texas Instruments Incorporated