
1996 Oct 25
13
Philips Semiconductors
Preliminary specication
Progressive scan-Zoom and Noise
reduction IC (PROZONIC)
SAA4990H
Notes
1. Data will be active after next VD pulse (pin 40).
2. In normal conditions control bit should be toggled field by field.
Register 1EH (horizontal delay)
1EH
0 to 2 in_del
programmable horizontal delay (0 to 7 clock periods) of the luminance data
input in comparison to the U/V data input (from FM1)
3, 4
HD_del
determines 1 to 4 clock pulse shift for horizontal reference HD
5, 6
WE2_del
determines 1 to 4 clock pulse shift for WE2 output
7
reserved
Register 1FH (sequence data)
1FH
0 to 2 mix
setting of mixer to 0, 1
4, 14, 12, 12, 34, 34, 1; setting per line in 1 to 16 lines
of line sequencer
3
post_zoom
setting of multiplexer pre or post LM_zoom to MIX; setting per line in
1 to 16 lines of line sequencer
4
post_lfr
setting of multiplexer pre or post LM_lfr to MIX; setting per line in
1 to 16 lines of line sequencer
5
mem_hold
setting of field and line memory hold; setting per line in 1 to 16 lines of line
sequencer
6
o_hold
setting of output hold, may stop e.g. LC display; setting per line in
1 to 16 lines of line sequencer
7
aux
setting of auxiliary sequencer output signal; setting per line in 1 to 16 lines
of line sequencer
Register 20H (sequence length)
20H
0 to 3 seq_length
setting of sequence length to 1, 2, 3 to 16 lines
4 to 7
reserved
Register 21H (eld control 1); note 1
21H
0
FCM4
see Fig.12 and Table 10
1
FCM23
2
FCM1
3, 4
xselUV
denes UV data output; see Fig.12 and Table 11
5, 6
xselY
denes Y data output; see Fig.12 and Table 11
7
RAM1wr
selects RAM1 for write operation; note 2; see Fig.13
Register 22H (eld control 2); note 1
22H
0
WE2act
activates eld controlled write enable 2 for FM2
1, 2
RE1del
line delay for read enable 1 (FM1) w.r.t. RE input (pin 39)
3, 4
RE2del
line delay for read enable 2 (FM2) w.r.t. RE input (pin 39)
5, 6
WE2del
line delay for write enable 2 (FM2) w.r.t. RE input (pin 39)
7
UV_av
UV averaged while luminance signal is median filtered
REGISTER
BIT
NAME
FUNCTION