SAB9076H Datasheet, PDF (10/32 Pages) NXP Semiconductors – Picture-In-Picture PIP controller

Philips Semiconductors
Picture-In-Picture (PIP) controller
Preliminary specification
SAB9076H
handbook, full pagewidth
BGVFP
BGHFP
MAHFP
MAVFP
SAHFP
MAIN CHANNEL
696 pixels
SAVFP
SUB CHANNEL
238 lines
Fig.3 Display fine positioning.
MGC964
PIP modes
The two independent acquisition channels can be
controlled independently on the display side. A wide
variety of modes is possible but a subset of 7 modes is
fixed and can be set easily by the I²C-bus. An overview of
the preconditioned modes is given in Table 3. For all PIP
modes the main and sub-display fine positioning must be
set to obtain a display configuration.
DATA TRANSFER
The internal data path has an 8-bit resolution and 4 : 1 : 1
data format. The communication to the external VDRAM
takes place at 864 × H_sync (both display and acquisition).
Approximately 800 8-bit words can be fetched from the
external VDRAM in one display line which is not enough to
display one complete display line with true 8-bit resolution.
Two methods of reducing data are available. One is simply
skipping the 8-bit to 6-bit (SKIP6, I²C-bus bit) and the other
is a small form of data reduction to come from 8-bit to 6-bit
(SMART6, I²C-bus bit). If both bits are set to logic 0 the
device is in true 8-bit resolution mode. For the twin PIP
mode the main channel is not placed in the VDRAM but in
an internal buffer, so still 8-bit resolution is achieved.
1996 Aug 13
10