saa6713h NXP Semiconductors, saa6713h Datasheet - Page 43
saa6713h
Manufacturer Part Number
saa6713h
Description
Xga Dual Input Flat Panel Controller
Manufacturer
NXP Semiconductors
Datasheet
1.SAA6713H.pdf
(103 pages)
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Philips Semiconductors
7.5
The line-locked PLL, input interface and mode detection
are provided with horizontal and vertical synchronization
pulse signals (HSYNC and VSYNC). Signal switching is
controlled by configuration registers SYNC_SEL (18H at
page 0) and SYNC_DIS (19H at page 0). A composite
sync decoder and hsync regeneration can be inserted.
Possible selections and the concerned configuration
parameters are shown in Fig.8 and described more
detailed in the Sections 7.5.1 to 7.5.5.
7.5.1
The composite sync decoder input is selected by
cs_dvi_de and sog_en. This allows to input the separated
SOG provided by the sync-on-green slicer, a composite
sync applied at input pin HSYNC or data enable DVI_DE
decoded from the DVI stream (see Table 22). The
sync-on-green slicer has to be enabled by setting
sync_on_green_en in register ADC_CTRL (00H at
page 1) to logic 1.
2004 Apr 05
handbook, full pagewidth
XGA dual input flat panel controller
Synchronization pulse distribution
C
OMPOSITE SYNC INPUT
CLK
pll_pre_div [ 15:0 ]
PRE-DIVIDER
pll_pre_div_en
FREQUENCY
DETECTOR
PHASE
AND
Fig.7 PLL block diagram.
50 to 320 MHz
OSCILLATOR
43
pll_en
To provide a stable hsync during the vsync, the
sync-on-green slicer might have to be disabled during the
vsync which is performed automatically if sog_vs_disable
is set to logic 1; otherwise the sync-on-green slicer is
constantly enabled.
The composite sync decoder will regenerate hsync and
vsync signals for internal use. Figure 9 shows the
composite sync modes that can be used. The maximum
number of equalizing pulses (csync-3 and csync-4) may
not exceed 30.
Table 22 Composite sync decoder input selection; note 1
Note
1. X = don’t care.
cs_dvi_en
pll_n_div [ 11:0 ]
n-DIVIDER
1
0
0
pll_m_div [ 1:0 ]
m-DIVIDER
sog_en
X
1
0
MHC214
2
Product specification
SAA6713H
DVI_DE
SOG
HSYNC
PLL
clock
CSYNC
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