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參數(shù)資料
| 型號： | SAA5297A |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Economy teletext and TV microcontrollers |
| 中文描述： | 經(jīng)濟圖文電視和電視微控制器 |
| 文件頁數(shù)： | 11/68頁 |
| 文件大?。?/td> | 612K |
| 代理商： | SAA5297A |
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1997 Jul 07
11
Philips Semiconductors
Preliminary specification
Economy teletext and TV microcontrollers
SAA5x9x family
7.3.5
6-
BIT
PWM DAC
S
Eight 6-bit DACs are available to allow direct control of analog parts of the television.
Each low resolution 6-bit DAC is controlled by its associated Special Function Register (PWM0 to PWM7). The PWM
outputs are alternative functions of Port 2 and Port 3.4. The PWE bit in the SFR for the port corresponding to the PWM
should be set to logic 1 for correct operation of the PWM, e.g. if PWM0 is to be used, P2.1 should be set to logic 1 setting
the port pin to high-impedance.
7.3.5.1
Pulse Width Modulator Registers (PWM0 to PWM7)
Table 3
Pulse Width Modulator Registers (see Table 10 for addresses)
Table 4
Description of PWMn bits (n = 0 to 7)
7
6
5
4
3
2
1
0
PWE
PV5
PV4
PV3
PV2
PV1
PV0
BIT
SYMBOL
DESCRIPTION
7
PWE
If PWE is set to a logic 1, the corresponding PWM is active and controls its assigned
port pin. If PWE is set to a logic 0, the port pin is controlled by the corresponding bit in
the port SFR.
Not used.
The output of the PWM is a pulse of period 21.33
μ
s with a pulse HIGH time determined
by the binary value of these 6-bits multiplied by 0.33
μ
s. PV5 is the most significant bit.
6
5
4
3
2
1
0
PV5
PV4
PV3
PV2
PV1
PV0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA5297AH | Economy teletext and TV microcontrollers |
| SAA5297APS | Economy teletext and TV microcontrollers |
| SAA5297H | Economy teletext and TV microcontrollers |
| SAA5297PS | Economy teletext and TV microcontrollers |
| SAA5491 | Economy teletext and TV microcontrollers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA5297AH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Economy teletext and TV microcontrollers |
| SAA5297APS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Economy teletext and TV microcontrollers |
| SAA5297H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Economy teletext and TV microcontrollers |
| SAA5297PS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Economy teletext and TV microcontrollers |
| SAA5355 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Single-chip colour CRT controller FTFROM |
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