NEC µPD72257 Preliminary User's Manual page 96

Chapter 4
Figure 4-7
Loop-back options
Table 4-2
Option
RGB(565)
Data format
RGB(666)
rising edge
sampling
Data clock
phase
falling edge
sampling
separate
HSYNC/VSYNC
Sync mode
composite
CSYNC
high active
(HSYNC/
VSYNC)
Sync signals
polarity
low active
(HSYNC/
VSYNC)
96
Video Output
(Ravin-M only)
Video Output
external Video Input I/F
Loop-back circuit block diagram
Since the Video Input as well as the Video Output modules provide several
configuration options with respect to the video data format, synchronization
signals and data clock phases, the settings of both modules must match in order
to capture safely the Video Output data.
The table below summarizes the valid options of how to set up the Video Input
and Video Output modules.
Loop-back mode options
Video Input settings
VInCONTROL.RGBEN = 1
VInCONTROL.RGBSEL = 0
VInCONTROL.RGBEN = 1
VInCONTROL.RGBSEL = 1
VInCONTROL.RGBEN = 1
VInCONTROL.RGBSEL = 1
VInSCALING.MX[6:0] = 00
VInSCALING.NX[5:0] = 00
VInCONTROL.CLKPH = 0
VInCONTROL.CLKPH = 1
VInCONTROL.SYNCSEL[1:0] = 01
VInCONTROL.SYNCSEL[1:0] = 10
VInCONTROL.SYNCSEL[1:0] = 01
VInCONTROL.SYNCINV = 0
VInCONTROL.SYNCSEL[1:0] = 01
VInCONTROL.SYNCINV = 1
Preliminary User's Manual S19203EE1V3UM00
SYSVIEN.VISEL[1:0]
1
11
10
0
01
Low level
00
signals
Video Output settings
VOnLCDCONTROL.LCDBPP[2:0] = 110
VOnLCDCONTROL.LCDBPP[2:0] = 101
VOnLCDCONTROL.LCDBPP[2:0] = 011
H
H
VOnLCDTIMING2.IPC = 1
VOnLCDTIMING2.IPC = 0
SYSVOCTRL.VOnSSEL = 0
B
SYSVOCTRL.CSYNCSELn = 0
SYSVOCTRL.CSYNCSELn = 1
B
VOnLCDTIMING2.IHS = 0
B
VOnLCDTIMING2.IVS = 0
VOnLCDTIMING2.IHS = 1
B
VOnLCDTIMING2.IVS = 1
System Controller
Video Input
B
B
a
B