PCA8514T PHILIPS [NXP Semiconductors], PCA8514T Datasheet - Page 22

• Manufacturer Part Number: PCA8514T
• Description: Stand-alone OSD
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
9.9
Table 26 Command 8 format
Command 8 loads Control Register 2 with data that
selects the input polarity of HSYNC and VSYNC (see
Fig.14) and also selects the Display modes.
Table 27 Selection of input polarity of HSYNC/VSYNC
Table 28 Selection of Display Mode
1995 Nov 27
BS1 BS0
0
0
1
1
S1
0
Stand-alone OSD
Hp/Vp
0
1
Command 8
0
1
0
1
S0
1
active LOW (the default setting)
active HIGH
Mode 0: this is the No background mode.
The OSD characters are superimposed on
the TV video signals (see Fig.15).
Mode 1: this is the North-West shadowing
mode; available only with character sizes
2V/2H or 4V/4H. The shadows are
generated as if a light source was placed
North-West of the character (see
Figs 16 to 18). The shadows generated lie
within 18 rows in a vertical direction but can
be extended by one bit to the next
characters first column, in a horizontal
direction (see Figs 19 and 20).
Mode 2: this is the Box shadowing mode. A
background dot matrix of 12
surrounds the character font; see
Figs 21 and 22.
Mode 3: this is the Frame shadowing
(raster blanking) mode. A background
colour fills the whole screen when no bit
patterns are being displayed (see Fig.23).
1 of 16 background colours can be selected
using Command F; the default background
colour is Blue.
7
0
6
1
INPUT POLARITY
5
0
DISPLAY MODE
4
1
Hp
3
Vp
2
18 bits
S1
1
S0
0
22
9.10
Table 29 Command 9 format
This command loads Control Register 3 with data that
controls both the character blinking frequency and the
active ratio of the character blinking frequency.
Figures 25 to 29 show how blinking influences the display
in different display modes.
Table 30 Selection of Blinking frequency
Table 31 Selection of active ratio of character blinking
BS1 BS0
BR1 BR0
BF1 BF0
0
0
0
1
1
0
0
1
1
Command 9
1
0
1
0
1
0
1
0
1
3 : 1 (the default setting)
1 : 1
1 : 3
reserved
f
---------------- -
f
---------------- -
f
---------------- -
f
---------------- -
7
0
VSYNC
VSYNC
VSYNC
VSYNC
128
16
32
64
6
1
BLINKING FREQUENCY (Hz)
; this is the default setting
5
1
4
0
ACTIVE RATIO
BF1
3
Product specification
BF0
2
PCA8514
BR1
1
BR0
0