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参数资料
| 型号： | ST7PLUSA2M6TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO8 |
| 封装： | 0.150 INCH, ROHS COMPLIANT, PLASTIC, SOP-8 |
| 文件页数： | 77/136页 |
| 文件大小： | 1705K |
| 代理商： | ST7PLUSA2M6TR |
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Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
ST7LITEUS2, ST7LITEUS5
Interrupts
45/136
7.4.2
Auxiliary voltage detector (AVD)
The voltage detector function (AVD) is based on an analog comparison between a VIT-(AVD)
and VIT+(AVD) reference value and the VDD main supply voltage (VAVD). The VIT-(AVD)
reference value for falling voltage is lower than the VIT+(AVD) reference value for rising
voltage in order to avoid parasitic detection (hysteresis).
The output of the AVD comparator is directly readable by the application software through a
real time status bit (AVDF) in the SICSR register. This bit is read only.
Monitoring the VDD main supply
The AVD threshold is selected by the AVD[1:0] bits in the AVDTHCR register.
If the AVD interrupt is enabled, an interrupt is generated when the voltage crosses the
VIT+(AVD) or VIT-(AVD) threshold (AVDF bit is set).
In the case of a drop in voltage, the AVD interrupt acts as an early warning, allowing
software to shut down safely before the LVD resets the microcontroller. See Figure 17.
The interrupt on the rising edge is used to inform the application that the VDD warning state
is over
Note:
Make sure the right combination of LVD and AVD thresholds is used as LVD and AVD levels
are not correlated. Refer to Table 47 on page 95 and Table 48 on page 96 for more details.
Figure 17.
Using the AVD to monitor VDD
VDD
VIT+(AVD)
VIT-(AVD)
AVDF bit
01
RESET
IF AVDIE bit = 1
Vhyst
AVD INTERRUPT
REQUEST
INTERRUPT Cleared by
VIT+(LVD)
VIT-(LVD)
LVD RESET
Early Warning Interrupt
(Power has dropped, MCU not
not yet in reset)
0
1
hardware
INTERRUPT Cleared by
reset
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PDF描述 |
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| ST7FLITEUSA2B6 | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP8 |
| ST7PLUSA2B6 | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP8 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ST7PMC1K2B3 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-bit MCU with nested interrupts, Flash, 10-bit ADC, brushless motor control, five timers, SPI, LINSCI? |
| ST7PMC1K2B6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI |
| ST7PMC1K2T3 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-bit MCU with nested interrupts, Flash, 10-bit ADC, brushless motor control, five timers, SPI, LINSCI? |
| ST7PMC1K2T6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI |
| ST7PMC1K2T6/ST7PMC1K2 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI |
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