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参数资料
| 型号： | P83C566BDR |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | Microcontrollers for PAL/SECAM TV with OSD and VST |
| 中文描述： | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PDIP42 |
| 封装： | 0.600 INCH, PLASTIC, SDIP-42 |
| 文件页数： | 69/92页 |
| 文件大小： | 382K |
| 代理商： | P83C566BDR |
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1999 Mar 10
69
Philips Semiconductors
Product specification
Microcontrollers for PAL/SECAM TV
with OSD and VST
P8xCx66 family
17.16 FB to RGB delay compensation
The P8xCx66 is connected to an analog video mixer. In the past analog mixers had different delays between FB and
RGB. To compensate for these differences, FB to RGB delay compensation is implemented on-chip. The delay time is
selected using the OSFBD register.
The delay compensation can be done with a resolution of
1
2
f
OSC
. The OSC clock runs at 4 times the OSD clock
frequency for OSD frequencies from 4 up to 6.75 MHz, and at 2 times the OSD clock frequency from OSD frequencies
from 6.75 MHz up to 12 MHz. At 4 MHz the delay unit is 33 ns, at 6.5 MHz the delay unit is 19 ns, at 8 MHz the delay
unit is 33 ns, at 10 MHz the delay unit is 25 ns and at 12 MHz the delay unit is 21 ns.
17.16.1 OSD FB D
ELAY
R
EGISTER
(OSFBD)
Table 79
OSD FB Delay Register (SFR address C7H)
Table 80
Description of OSFBD bits
Table 81
Selection of FB to RGB delay
7
6
5
4
3
2
1
0
0
FBD3
FBD2
FBD1
FBD0
BIT
SYMBOL
DESCRIPTION
7 to 5
4
These 3 bits are not used.
This bit must be set to a logic 0. If set to a logic 1, the character font will come from
internal logic instead of character ROM.
FB to RGB delay select.
These 4 bits select the delay unit multiple that will determine
the delay time between FB and RGB; see Table 81.
3 to 0
FBD3 to FB
D0
FBD3
FBD2
FBD1
FBD0
DECIMAL
VALUE
7
6
5
4
3
2
1
0
+0
+1
+2
+3
+4
+5
+6
+7
FB to RGB DELAY
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
1
1
0
0
0
0
1
1
0
0
1
1
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
Delay RGB with 7 units in relation to FB.
Delay RGB with 6 units in relation to FB.
Delay RGB with 5 units in relation to FB.
Delay RGB with 4 units in relation to FB.
Delay RGB with 3 units in relation to FB.
Delay RGB with 2 units in relation to FB.
Delay RGB with 1 units in relation to FB.
Delay RGB with 0 unit in relation to FB.
Delay FB with 0 unit in relation to RGB.
Delay FB with 1 unit in relation to RGB.
Delay FB with 2 units in relation to RGB.
Delay FB with 3 units in relation to RGB.
Delay FB with 4 units in relation to RGB.
Delay FB with 5 units in relation to RGB.
Delay FB with 6 units in relation to RGB.
Delay FB with 7 units in relation to RGB.
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