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參數(shù)資料
| 型號： | SAA5288PS |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | TV microcontroller with full screen On Screen Display OSD |
| 中文描述： | 微控制器與電視屏幕顯示OSD全屏 |
| 文件頁數(shù)： | 11/48頁 |
| 文件大?。?/td> | 508K |
| 代理商： | SAA5288PS |
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1997 Jun 24
11
Philips Semiconductors
Preliminary specification
TV microcontroller with full screen
On Screen Display (OSD)
SAA5288
7.3.7
S
OFTWARE
ADC
Up to 4 successive approximation ADCs can be
implemented in software by making use of the on-chip 8-bit
DAC and multiplexed voltage comparator. The software
ADC uses 4 analog inputs which are multiplexed with P3.0
to P3.3.
Table 9
ADC input channel selection
CH1
CH0
INPUT PIN
0
0
1
1
0
1
0
1
P3.3/ADC3
P3.0/ADC0
P3.1/ADC1
P3.2/ADC2
The control of the ADC is achieved using the Special
Function Registers SAD and SADB.
SAD.CH1 and SAD.CH0 select one of the four inputs to
pass to the comparator. The other comparator input
comes from the DAC, whose value is set by SAD.SAD7
(MSB) to SAD.SAD4 and SADB.SAD3 to SADB.SAD0
(LSB). The setting of the value SAD.SAD7 to SAD.SAD4
must be performed at least 1 instruction cycle before the
setting of SAD.ST to ensure comparison is made using the
correct SAD.SAD7 to SAD.SAD4 value.
The output of the comparator is SAD.VHI, and is valid after
1 instruction cycle following the setting of SAD.ST to
logic 1.
Fig.3 SAD block diagram.
handbook, halfpage
MULTIPLEXER
P3.1
VH1
MGL115
P3.2
P3.3
CH1, CH0
SAD7 to SAD0
REF
+
REF
1D
ST
C1
8-BIT DAC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA5290 | One page Economy Teletext/TV microcontroller |
| SAA5290A | Economy teletext and TV microcontrollers |
| SAA5290PS | Economy teletext and TV microcontrollers |
| SAA5290ZP | One page Economy Teletext/TV microcontroller |
| SAA5291PS | Economy teletext and TV microcontrollers(經(jīng)濟的圖文電視和TV控制器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA5290 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Economy teletext and TV microcontrollers |
| SAA5290A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Economy teletext and TV microcontrollers |
| SAA5290PS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Economy teletext and TV microcontrollers |
| SAA5290ZP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One page Economy Teletext/TV microcontroller |
| SAA5290ZP/NV | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One page Economy Teletext/TV microcontroller |
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