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參數(shù)資料
| 型號(hào)： | ST6389 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
| 中文描述： | 8位微控制器對(duì)屏幕，電視調(diào)諧顯示器 |
| 文件頁(yè)數(shù)： | 45/82頁(yè) |
| 文件大?。?/td> | 718K |
| 代理商： | ST6389 |
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ST6380, ST6381, ST6382, ST6383, ST6388, ST6389
4.5 6-BIT PWM D/A CONVERTERS
The D/A macrocell contains up to six PWM D/A
outputs (31.25kHz repetition, DA0-DA5) with six
bit resolution.
Each D/A converter of ST638x is composed by the
following main blocks:
– pre-divider
– 6-bit counter
– data latches and compare circuits
The pre-divider uses the clock input frequency
(8MHz typical) and its output clocks the 6-bit free-
running counter. The data latched in the six regis-
ters (E0h, E1h, E2h, E3h, E6h and E7h) control
the six D/A outputs (DA0,1,2, 3, 4 and 5). When all
zeros are loaded the relevant output is an high log-
ic level; all 1's correspond to a pulse with a 1/64
duty cycle and almost 100% zero level.
The repetition frequency is 31.25kHz and is relat-
ed to the 8MHz clock frequency. Use of a different
oscillator frequency will result in a different repeti-
tion frequency. All D/A outputs are open-drain with
standard current drive capability and able to with-
stand up to 12V.
DA0-DA5 Data/Control Register (DADCR)
Address: E0h, E1h, E2h, E3h, E6h, E7h, - Write
only
Reset Value: XXh
Caution
:
This register contains at least one write
only bit. Single bit instructions (SET, RES, INC
and DEC) should not be used.
DADCR0-DADCR5.
These are the 6 bits of the
PWM digital to analog converter. Undefined after
reset.
Figure 30. 6-bit PWM D/A Output Configuration
7
0
-
-
DADCR
5
DADCR
4
DADCR
3
DADCR
2
DADCR
1
DADCR
0
DA0-DA5
Out
N
OUT
(OPEN-DRAIN, 12V)
VA00343
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST6389B1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
| ST6389B4 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
| ST6391 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6391B1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6392 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
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