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參數資料
| 型號： | PCA8516 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Stand-alone OSD |
| 中文描述： | 單機OSD |
| 文件頁數： | 35/64頁 |
| 文件大小： | 403K |
| 代理商： | PCA8516 |
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1995 Mar 30
35
Philips Semiconductors
Preliminary specification
Stand-alone OSD
PCA8516
9.11
Command A
Table 33
Command A format
Command A loads Control Register 4 with data that
determines the function of pin 2 (P04/ACM(VOB2)).
Table 34
Selection of P04 or ACM
9.12
Commands B, C and D
Table 35
Command B format
Table 36
Command C format
Table 37
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
→
H0) is the decimal value of these 6 bits and
(H5
→
H0)
≥
4.
Where (V5
→
V0) is the decimal value of these 6 bits and
(V5
→
V0)
≥
0.
BS1
BS0
7
6
5
4
3
2
1
0
0
1
0
1
1
1
0
A/P
0
0
A/P
PIN FUNCTION
0
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.
1
BS1
BS0
7
6
5
4
3
2
1
0
0
1
1
0
0
1
V5
V4
V3
V2
BS1
BS0
7
6
5
4
3
2
1
0
0
1
1
0
1
0
V1
V0
H5
H4
BS1
BS0
7
6
5
4
3
2
1
0
0
1
1
0
1
1
H3
H2
H1
H0
HP
4
H5
H0
→
(
)
5
+
×
[
]
f
OSD
×
=
VP
4
V5
V0
→
(
)
×
[
]
number of scan lines
×
=
9.13
Command E
When output ports P00, P01 and P04 are enabled,
Command E is used to write data to them.
Table 38
Command E format
9.14
Command F
Table 39
Command F format
This command loads Control Register 5 with data that
determines the background colour in Frame shadowing
mode.
9.15
Command G
Table 40
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“The programming guide
for the PCA8516”report number MICT/AN9402.
Table 41
Horizontal stabilization circuit control
Table 42
Selection of Half-tone mode
BS1
BS0
7
6
5
4
3
2
1
0
0
1
1
1
X
P04
X
X
P01
P00
BS1
BS0
7
6
5
4
3
2
1
0
0
0
0
1
0
0
R
G
B
I
BS1
BS0
7
6
5
4
3
2
1
0
0
0
0
1
0
1
HM3 HT2
FS1
FS0
HM3
STATE OF STABILIZATION CIRCUIT
0
1
Stabilization circuit disabled (the default state).
Horizontal stabilization circuit enabled.
HT2
HALF-TONE MODE
0
1
Half-tone mode not selected (the default state).
Half-tone mode available when ACM bit = 1.
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