Nxp Semiconductors UM10237 User Manual

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UM10237_2
© NXP B.V. 2008. All rights reserved.
User manual
Rev. 02 — 19 December 2008 
307 of 792
NXP Semiconductors
UM10237
Chapter 12: LPC24XX LCD controller
15
reserved
Reserved, user software should not write ones to reserved bits. 
The value read from a reserved bit is not defined.
-
14
IOE
Invert output enable.
This bit selects the active polarity of the output enable signal in 
TFT mode. In this mode, the LCDENAB pin is used as an enable 
that indicates to the LCD panel when valid display data is 
available. In active display mode, data is driven onto the LCD 
data lines at the programmed edge of LCDDCLK when 
LCDENAB is in its active state.
0 = LCDENAB output pin is active HIGH in TFT mode.
1 = LCDENAB output pin is active LOW in TFT mode.
0x0
13
IPC
Invert panel clock.
The IPC bit selects the edge of the panel clock on which pixel 
data is driven out onto the LCD data lines.
0 = Data is driven on the LCD data lines on the rising edge of 
LCDDCLK.
1 = Data is driven on the LCD data lines on the falling edge of 
LCDDCLK.
0x0
12
IHS
Invert horizontal synchronization.
The IHS bit inverts the polarity of the LCDLP signal.
0 = LCDLP pin is active HIGH and inactive LOW.
1 = LCDLP pin is active LOW and inactive HIGH.
0x0
11
IVS
Invert vertical synchronization.
The IVS bit inverts the polarity of the LCDFP signal.
0 = LCDFP pin is active HIGH and inactive LOW.
1 = LCDFP pin is active LOW and inactive HIGH.
0x0
Table 263. Clock and Signal Polarity register (LCD_POL, RW - 0xFFE1 0008)
Bits
Function
Description
Reset 
value