SDA9401 Datasheet, PDF (10/69 Pages) List of Unclassifed Manufacturers – Scan Rate Converter using Embedded DRAM Technology Units

SDA 9401
Input write parameter
Parameter
[Default value]
NALIP
[20]
ALPFIP
[144]
NAPLIP
NAPIPDL
[0]
NAPIPPH
[0]
APPLIP
[45]
PIMODE
1: on
0: off
[0]
VERPOS
[0]
VERWIDTH
[0]
HORPOS
[0]
HORWIDTH
[0]
Subaddress
02h
03h
00h, 04h
05h
00h
08h
07h
0Ah
09h
Description
Not Active Line InPut defines the number of lines from
the V-Sync to the first active line of the field
Active Lines Per Field InPut defines the number of active
lines
Not Active Pixels Per Line InPut defines the number of
pixels from the H-Sync to the first active pixel of the line.
The number of pixels is a combination of NAPIPDL and
NAPIPPH.
Active Pixels Per Line InPut defines the number of active
pixels
Picture Insert MODE allows the insertion of an arbitrary
picture with the horizontal and vertical width defined by
VERWIDTH and HORWIDTH at the position defined by
VERPOS and HORPOS
VERtical POSition defines the number of lines from the
first active line to the first active line of an inserted pic-
ture
VERtical WIDTH defines the number of lines (vertical
width) of an inserted picture
HORizontal POSition defines the number of pixels from
the first active pixel to the first active pixel of an inserted
picture
HORizontal WIDTH defines the number of pixels (hori-
zontal width) of an inserted picture
Inside the SDA 9401 a field detection block is necessary for the detection of an odd (A) or even (B)
field. Therefore the incoming H-Sync H1 (delayed HIN signal, delay depends on NAPIPDL and
NAPIPPH) is doubled (H2 signal). Depending on the phase position of the rising edge of the VIN
signal an A (rising edge between H1 and H2) or B (rising edge between H2 and H1) field is
detected. For proper operation of the field detection block, the VIN must be delayed depending on
the delay of the HIN signal (H1). The figure below explains the field detection process and the
functionality of the VINDEL parameter (inside the SDA 9401 the delayed VIN signal is called Vd and
the detected field signal is called Ffd).
Micronas
10
Preliminary Data Sheet