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| 型号： | P83C570 |
| 厂商： | NXP Semiconductors N.V. |
| 英文描述： | Microcontrollers for NTSC TVs with On-Screen Display OSD and Closed Caption CC |
| 中文描述： | 微控制器用于NTSC电视的屏幕显示OSD和字幕消委会 |
| 文件页数： | 56/80页 |
| 文件大小： | 266K |
| 代理商： | P83C570 |
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1999 Jun 11
56
Philips Semiconductors
Product specification
Microcontrollers for NTSC TVs with On-Screen
Display (OSD) and Closed Caption (CC)
P8xCx70 family
18.9.9
S
TATUS
R
EGISTER
(SR)
A status register is provided that holds information that the processor can use to regulate the way data is written into the
display unit. The register is split into a read only and write only register. Both use the same address.
Table 91
Status Register (address 87F8H); read only
Table 92
Description of SR bits
7
6
5
4
3
2
1
0
BUSY
FIELD
SCRL
SCR3
SCR2
SCR1
SCR0
BIT
SYMBOL
DESCRIPTION
7
BUSY
Character display active or vertical sync.
If BUSY = 0, this indicates that the
processor can access the display unit without causing effects on the screen. The lead
time is 4 ms, this is implemented to allow the microcontroller to finish the current access
to the display memory. Two modes are provided to switch between the text horizontal
blank area or vertical blank area.
Random information.
1st or 2nd Field of vertical frame.
Scroll busy.
If SCRL = 1, this bit indicates that the scroll function is in progress. When
this bit is set, the automatic scroll function is started. It is automatically cleared on
completion. If forced to a logic 0, the scroll function will be terminated as if all lines were
scrolled. Subsequent logic 0 writes will cause the scroll row to increment by one.
First scroll row select.
The value specified by these 4 bits selects the actual row that is
the first one to be displayed in the scroll area. This value is modified by the automatic
scroll function.
6
5
4
FIELD
SCRL
3
2
1
0
SCR3
SCR2
SCR1
SCR0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| P83C570AAR | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Microcontrollers for NTSC TVs with On-Screen Display OSD and Closed Caption CC |
| P83C575EBA | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| P83C575EBAA | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family 8K/256 OTP/ROM/ROMless, 4 comparator, failure detect circuitry, watchdog timer |
| P83C575EBB | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| P83C575EBBB | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family 8K/256 OTP/ROM/ROMless, 4 comparator, failure detect circuitry, watchdog timer |
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