PCA8514T PHILIPS [NXP Semiconductors], PCA8514T Datasheet - Page 35

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

Philips Semiconductors
9.11
Table 32 Command A format
Command A loads Control Register 4 with data that
determines the function of pin 2 (P04/ACM(VOB2)).
Table 33 Selection of P04 or ACM
9.12
Table 34 Command B format
Table 35 Command C format
Table 36 Command D format
These three commands determine the vertical and
horizontal start positions of the display. 64 vertical and
64 horizontal start positions can be selected. After a
master reset, starting positions are not guaranteed and
therefore must be programmed by the user. The horizontal
start position (HP) and the vertical start position (VP) may
be calculated as follows:
Where (H5
(H5
Where (V5
(V5
1995 Nov 27
HP
VP
BS1 BS0
BS1 BS0
BS1 BS0
BS1 BS0
0
0
0
0
Stand-alone OSD
A/P
=
=
0
1
V0)
Command A
Commands B, C and D
H0)
4
4
1
1
1
1
0.
4.
V5
P04 is selected as an output port. Data is
written to this port using Command E. This
is also the default setting.
ACM function selected; can also be used
as the 5th colour signal.
H5
H0) is the decimal value of these 6 bits and
V0) is the decimal value of these 6 bits and
7
0
7
1
7
1
7
1
V0
H0
6
1
6
0
6
0
6
0
+
5
1
5
0
5
1
5
1
5
number of scan lines
PIN FUNCTION
f
4
1
4
1
4
0
4
1
OSD
H3
V5
V1
3
0
3
3
3
A/P
H2
V4
V0
2
2
2
2
H5
H1
V3
1
0
1
1
1
V2
H4
H0
0
0
0
0
0
35
9.13
When output ports P00, P01 and P04 are enabled,
Command E is used to write data to them.
Table 37 Command E format
9.14
Table 38 Command F format
This command loads Control Register 5 with data that
determines the background colour in Frame shadowing
mode.
9.15
Table 39 Command G format
Command G is used to enable/disable the OSD horizontal
stabilization circuit, to select the Half-tone mode and to
select the character size of the first line.
In the Half-tone mode, excellent semi-transparent
half-tone effects can be obtained with OSD frequencies in
the range 4 to 7 MHz. This mode also enhances the
background colour with intensity output. For further details
on the half-tone effect refer to “The programming guide for
the PCA8514” , report number MICT/AN9402.
Table 40 Horizontal stabilization circuit control
Table 41 Selection of Half-tone mode
BS1 BS0
BS1 BS0
BS1 BS0
HM3
HT2
0
0
0
0
1
0
1
Command E
Command F
Command G
Stabilization circuit disabled (the default state).
Horizontal stabilization circuit enabled.
Half-tone mode not selected (the default state).
Half-tone mode available when ACM bit = 1.
1
0
0
STATE OF STABILIZATION CIRCUIT
7
0
7
1
7
0
6
1
6
1
6
1
HALF-TONE MODE
5
0
X
5
5
0
4
1
P04
HM3
4
4
0
3
X
Product specification
3
R
3
HT2
2
PCA8514
X
2
G
2
FS1
1
P01 P00
1
B
1
FS0
0
0
0
I