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| 型号： | ST6382B1/XXX |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, MICROCONTROLLER, PDIP42 |
| 封装： | PLASTIC, SDIP-42 |
| 文件页数： | 40/82页 |
| 文件大小： | 1651K |
| 代理商： | ST6382B1/XXX |
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ST6388, ST63E88, ST63T88
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 29. 6-bit PWM D/A Output Configuration
70
--
DADCR
5
DADCR
4
DADCR
3
DADCR
2
DADCR
1
DADCR
0
DA0-DA5
Out
N
OUT
VA00343
(OPEN-DRAIN, 12V)
相关PDF资料 |
PDF描述 |
|---|---|
| ST6386B1 | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| ST6388B1 | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| ST6387B1 | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| ST6394B1 | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| ST6399B1 | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST6382B4 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
| ST6383 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
| ST6383B1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
| ST6383B4 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
| ST6385 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
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