ST92T163R4T1 STMicroelectronics, ST92T163R4T1 Datasheet - Page 88

• Manufacturer Part Number: ST92T163R4T1
• Description: Microcontrollers (MCU) OTP EPROM 20K USB/I2
• Manufacturer: STMicroelectronics

Specifications of ST92T163R4T1

• Data Bus Width: 8 bit, 16 bit
• Program Memory Type: EPROM
• Program Memory Size: 20 KB
• Data Ram Size: 2 KB
• Interface Type: I2C, SCI, USB
• Maximum Clock Frequency: 24 MHz
• Number Of Programmable I/os: 64
• Number Of Timers: 2
• Operating Supply Voltage: 4 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-64
• Minimum Operating Temperature: 0 C
• On-chip Adc: 8 bit
• Lead Free Status / Rohs Status: No

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).
Figure 47. Low Voltage Detector Reset Function
Figure 48. Low Voltage Detector Reset Signal
Note: Refer to Electrical Characteristics for the values of V
88/224
V
Internal Reset
DD
RESET
(External pin)
V
DD
Low Voltage
Detector Reset
V
LVDUP
The LVD circuitry generates a reset when V
below:
– V
– V
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.
LVDUP
LVDOWN
DD
, V
LVDUP
when V
when V
and V
DD
V
DD
LVDDOWN
is rising
LVDDOWN
is falling
Internal Reset
.
DD
is