saa6713ah NXP Semiconductors, saa6713ah Datasheet - Page 45

• Manufacturer Part Number: saa6713ah
• Description: Xga Analog Input Flat Panel Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 26 Input interface sync selection; note 1
Note
1. X = don’t care.
7.5.5
Besides serving as input for an external vertical
synchronization pulse VSYNC can be switched as output
of the vsync internally derived from (not shown in Fig.8):
The I/O direction of pin VSYNC is selected by
vsync_out_en of register SYNC_SEL (18H at page 0). In
case of output mode, the source is selected by
sog_out_en of register SYNC_SEL according to Table 27.
Table 27 Pin VSYNC switching modes; note 1
Note
1. X = don’t care.
7.6
An interrupt signal is provided at output pin INT (active
LOW). The state of INT is based on mode detection,
auto-adjustment, OSD, decoupling FIFO and output
interface interrupt conditions shown in Table 28.
2004 Apr 05
iif_cs_sog_en
vsync_out_en sog_out_en DIRECTION
Sync-on-green slicer (SOG)
Composite sync decoder (VS_CS).
XGA analog input flat panel controller
Interrupt generation
0
1
1
0
1
1
P
IN
VSYNC
regen_on
iif_hs_
CONFIGURATION
X
X
0
1
1
0
HSYNC
HS_CS
HS_REGEN
input
output
HS_IIF
VSYNC
VS_CS
external
SOG
VS_CS
VSYNC
VS_IIF
45
Table 28 Interrupt conditions and description
Interrupt output pin INT is set LOW (active) whenever one
or more of the interrupt flags is HIGH. The interrupt flags
are set HIGH, when the corresponding interrupt condition
is met:
INTERRUPT
int_mode
int_auto
int_fifo
int_osd
int_oif
int_iif
The mode detection interrupt flag is set HIGH when one
of the mode measurement bits toggles or a value
changes significantly at the vsync or in case of vsync or
hsync jitter, depending on which of the conditions are
enabled (see Section 7.10.1).
The auto-adjustment interrupt flag is set HIGH in the
moment an auto-adjustment measurement finishes,
indicating the result values can be read out.
The decoupling FIFO interrupt flag is set HIGH
whenever the decoupling FIFO is full, indicating that the
output timing is too slow and a change of the timing is
required; otherwise a corrupt output picture will occur.
The OSD interrupt flag is set HIGH every time a pointer
animation frame sequence ends to allow to switch the
displayed icon and program the icon for the next turn
(see Section 7.13.3).
The output interface interrupt flag is set HIGH when the
pixel stream to the output interface is broken, indicating
that the output pixel or line rate is too fast.
The hsync jitter interrupt flag (int_iif) is set HIGH when
line jitter at the analog video input occurs more than a
number of times specified in the register II_HJIT,
indicating that the other clock edge should be used to
sample the hsync and vsync signal.
mode detection
auto-adjustment auto-adjustment
decoupling
FIFO
OSD
output interface
input interface
SUBMODULE
change of input video
mode detected
finished
FIFO overflow
end of programmed
OSD frame sequence
FIFO underflow
line jitter occurs
(hsync jitter detection)
SAA6713AH
Product specification
DESCRIPTION