ST7FLITEUS5B6 STMicroelectronics, ST7FLITEUS5B6 Datasheet - Page 45

• Manufacturer Part Number: ST7FLITEUS5B6
• Description: MCU 8BIT 1KB FLASH 128KB 8-DIP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST7FLITEUS5B6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 5
• Program Memory Size: 1KB (1K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Controller Family/series: ST7
• No. Of I/o's: 5
• Ram Memory Size: 128Byte
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Rohs Compliant: Yes
• For Use With: 497-6403 - BOARD EVAL 8BIT MICRO + TDE1708497-6407 - BOARD EVAL FOR VACUUM CLEANER497-5861 - EVAL BRD POWER MOSFET/8PIN MCU497-5858 - EVAL BOARD PLAYBACK ST7FLITE497-5515 - EVAL BOARD PHASE CTRL DIMMER497-5049 - KIT STARTER RAISONANCE ST7FLITE497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -
• Other names: 497-5636-5

ST7LITEUS2, ST7LITEUS5
7.4.2
Note:
Auxiliary voltage detector (AVD)
The voltage detector function (AVD) is based on an analog comparison between a V
and V
reference value for falling voltage is lower than the V
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 V
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
V
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
The interrupt on the rising edge is used to inform the application that the V
is over
Make sure the right combination of LVD and AVD thresholds is used as LVD and AVD levels
are not correlated. Refer to
Figure 17. Using the AVD to monitor V
AVDF bit
AVD INTERRUPT
REQUEST
IF AVDIE bit = 1
IT+(AVD)
LVD RESET
V
V
V
V
IT+(AVD)
IT+(LVD)
IT-(LVD)
IT-(AVD)
IT+(AVD)
or V
V
DD
IT-(AVD)
reference value and the V
0
DD
threshold (AVDF bit is set).
main supply
1
Table 47 on page 95
INTERRUPT Cleared by
V
Early Warning Interrupt
(Power has dropped, MCU not
not yet in reset)
hyst
reset
RESET
DD
DD
main supply voltage (V
and
IT+(AVD)
Table 48 on page 96
1
reference value for rising
INTERRUPT Cleared by
AVD
hardware
). The V
0
DD
for more details.
Figure
IT-(AVD)
warning state
Interrupts
17.
IT-(AVD)
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