PXD20RM Datasheet, PDF (1509/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

Chapter 46
Timing Controller (TCON)
46.1 Introduction
The Timing Controller module (TCON) provides an alternative interface for the DCU3 that provides RGB
data and timing signals for “raw” TFT panels which have no embedded TCON. The TCON drives the
panel via a RSDS (Reduced Swing Differential Signalling) interface (refer to RSDS^TM “Intra-panel“
interface specification, revision 1.0, National Semiconductor). The TCON and associated RSDS I/O
module enable direct drive of the row and column drivers of display panels enabling emulation of TCON
ICs used in display panels.
Figure 46-1 shows a typical application diagram of the TCON.
Gray Scale
Reference
/9 + CLK RSDS BUS
Gray Scale Voltage Reference BUS
Line Transfer Signal
tcon_out[x]
hsync_in
vsync_in
data_en_in
data_in
24
RSDS I/O
TCON
Start Pulse/tcon_out[x]
RSDS CD
Start Pulse/tcon_out[x]
RSDS CD
A1
An
RSDS CD RSDS CD
TFT LCD Panel
A1
An
Figure 46-1. Application diagram of the TCON
46.1.1 Features
• Flexible timing generation unit supporting 12 timing signal channels
• Conforms to RSDS^TM “Intra-panel“ interface specification, revision 1.0 (National Semiconductor)
• Flexible mapping of RGB data to RSDS channels
• Support bit mapping or 8-bit or 6-bit color depth
• Output data signal transition minimization through data inversion control
• Blanking of RGB data during inactive period (driven to all “0” or all “1”)
• Flexible RSDS output setup/hold time control in granulatiry of 1/2 system clock cycle
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
46-1