UM10503
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User manual
Rev. 1.3 — 6 July 2012
802 of 1269
NXP Semiconductors
UM10503
Chapter 27: LPC43xx LCD
27.8 LCD timing diagrams
(1) The active data lines will vary with the type of STN panel (4-bit, 8-bit, color, mono) and with single or dual frames.
(2) The LCD panel clock is selected and scaled by the LCD controller and used to produce LCDCLK.
(3) The duration of the LCDLP signal is controlled by the HSW field in the TIMH register.
(4) The Polarity of the LCDLP signal is determined by the IHS bit in the POL register.
Fig 83. Horizontal timing for STN displays
pixel clock
(internal)
LCD_TIMH (HSW)
LCDLP
(line synch
pulse)
suppressed
during LCDLP
LCD_TIMH (HBP)
16
LCD_TIMH(PPL)
1
LCD_TIMH (HFP)
LCDDCLK
(panel clock)
horizontal back porch
(defined in pixel clocks)
horizontal front porch
(defined in pixel clocks)
one horizontal line of LCD data
LCDVD[15:0]
(panel data)
one horizontal line