saa6713h NXP Semiconductors, saa6713h Datasheet - Page 74

• Manufacturer Part Number: saa6713h
• Description: Xga Dual Input Flat Panel Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7.14.3
The OSD pointer icon is a four colour 32
structure and is intended to be used as a cursor on top of
an OSM (see Fig.24). It is very much alike the OSD bitmap
part allowing individual positioning (OSDP_PX_HI,
OSDP_PX_LO, OSDP_PY_HI and OSDP_PY_LO),
zooming, flipping and rotating (OSDP_CTRL0) but will
always be displayed on top of any OSD text or OSD bitmap
window. It is fixed in its resolution and always uses 2 bits
per pixel allowing 4 possible colours. Those colours are
again definable via a palette in the OSD colour settings
(register page 9) where colour 0 is always treated as
background colour. The foreground and the background
colours can be displayed from solid to almost transparent
with an individual alpha-blending factor (OSDP_FGA and
OSDP_BGA) or fully transparent using fg_trans and
bg_trans flags inside the OSDP_CTRL1 register.
For animation purpose of the icon, it is double buffered and
able to generate a frame based switching interrupt. The
buffer to be displayed can either be selected manually via
the buffer_sel flag (OSDP_CTRL0[6]) or can be switched
automatically on each generated interrupt
(OSDP_CTRL0[7]). During the display of one buffer all
writes are redirected to the inactive buffer. The period of
the animation interrupt can be adjusted with the
OSDP_AD register that defines the number of frames
between two interrupts. The interrupt generation itself can
be enabled with the anim_int_en flag (OSDP_CTRL1[5]).
2004 Apr 05
XGA dual input flat panel controller
OSD
POINTER
32 pixel
74
The definition of the OSD pointer RAM is similar to the
definitions of the OSD bitmap RAM. The data is written
MSB-aligned to the OSDP_DEF register using 2 bits per
pixel. It is written starting from the pixel-exact coordinates
given with the OSD pointer cursor (OSDP_CX and
OSDP_CY). Instead of using a masked writing the
definition width giving the number of pixels that are used
from the OSDP_DEF register and written from the given
start position can be set via the OSDP_DW register. As in
the preceding OSD units also the OSD pointer uses an
auto-increment always setting the cursor to the following
definition position on each write to OSDP_DEF where the
increment is depending on the actual used defwidth.
Together with stopped SAA6713H register auto-increment
at OSDP_DEF, this allows a fast burst definition mode that
needs 256 I
complete pointer buffer (see Table 49).
2
C-bus byte transmissions to define a
Product specification
SAA6713H