ST92T163R4D0 查看數據表（PDF） - STMicroelectronics

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ST92T163R4D0

8/16-BIT FULL SPEED USB MCU FOR COMPOSITE DEVICES WITH 16 ENDPOINTS, 20K ROM, 2K RAM, I2C, SCI, & MFT

STMicroelectronics 

ST92163 - RESET AND CLOCK CONTROL UNIT (RCCU)

5.8 LOW VOLTAGE DETECTOR (LVD) RESET

The on-chip Low Voltage Detector (LVD) gener-

ates a static reset when the supply voltage is be-

low a reference value. The LVD works both during

power-on as well as when the power supply drops

(brown-out). The reference value for the voltage

drop is lower than the reference value for power-

on in order to avoid a parasitic reset when the

MCU starts running and sinks current on the sup-

ply (hysteresis).

The LVD circuitry generates a reset when VDD is

below:

– VLVDUP when VDD is rising

– VLVDOWN when VDD is falling

The Low Voltage Detector circuitry resets only the

MCU and it does not change the external RESET

pin status: no reset signal for an external applica-

tion is generated.

Figure 47. Low Voltage Detector Reset Function

VDD

Low Voltage

Detector Reset

Internal Reset

RESET

(External pin)

Figure 48. Low Voltage Detector Reset Signal

VDD

VLVDUP

VLVDDOWN

Internal Reset

Note: Refer to Electrical Characteristics for the values of VDD, VLVDUP and VLVDDOWN.

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