ST7FLI49MK1T6 STMicroelectronics, ST7FLI49MK1T6 Datasheet - Page 42

• Manufacturer Part Number: ST7FLI49MK1T6
• Description: MCU 8BIT SGL VOLT FLASH 32-LQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST7FLI49MK1T6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• Processor Series: ST7FLI4x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 384 B
• Interface Type: I2C
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 5
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 10 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Supply, reset and clock management
7.4.2
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Figure 17. Low voltage detector vs reset
Figure 18. Reset and supply management block diagram
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.
RESET
IT+(AVD)
V
V
V
V
RESET
SS
DD
IT+(LVD)
IT-(LVD)
IT+(AVD)
or V
V
DD
IT-(AVD)
reference value and the V
RESET SEQUENCE
MANAGER
DD
(RSM)
threshold (AVDF bit is set).
main supply
TIMER (WDG)
WATCHDOG
Doc ID 13562 Rev 3
SICSR
SYSTEM INTEGRITY MANAGEMENT
DD
0
main supply voltage (V
CR1
V
hys
CR0
AUXILIARY VOLTAGE
WDGF
IT+(AVD)
LOW VOLTAGE
DETECTOR
DETECTOR
STATUS FLAG
0
(AVD)
(LVD)
LVDRF
reference value for rising
AVDF
AVD
AVD Interrupt Request
AVDIE
). The V
DD
Figure
IT-(AVD)
warning state
ST7LITE49M
19.
IT-(AVD)