ST92T141K4M6 STMicroelectronics, ST92T141K4M6 Datasheet - Page 78

• Manufacturer Part Number: ST92T141K4M6
• Description: Microcontrollers (MCU) OTP EPROM 16K SPI
• Manufacturer: STMicroelectronics

Specifications of ST92T141K4M6

• Data Bus Width: 8 bit, 16 bit
• Program Memory Type: EPROM
• Program Memory Size: 16 KB
• Data Ram Size: 512 B
• Interface Type: SPI
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 2
• Operating Supply Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SO-34
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 6 Channel
• Lead Free Status / Rohs Status: No

ST92141 - RESET AND CLOCK CONTROL UNIT (RCCU)
5.8 LOW VOLTAGE DETECTOR (LVD)
To allow the integration of power management
features in the application, the Low Voltage Detec-
tor function (LVD) generates a static reset when
the V
value. This means that it secures the power-up as
well as the power-down keeping the ST9 in reset.
The V
lower than the V
in order to avoid a parasitic reset when the MCU
starts running and sinks current on the supply
(hysteresis).
The LVD Reset circuitry generates a reset when
V
Figure 40. Low Voltage Detector vs Reset
78/179
DD
– V
– V
RESET
1
is below:
DD
LVDr
LVDf
LVDf
V
V
LVDf
LVDr
supply voltage is below a V
when V
when V
reference value for a voltage drop is
V
DD
LVDr
DD
DD
reference value for power-on
is falling
is rising
LVDf
reference
HYSTERISIS
V
The LVD function is illustrated in
Provided the minimum V
the oscillator frequency) is below V
can only be in two modes:
In these conditions, secure operation is always en-
sured for the application without the need for ex-
ternal reset hardware.
LVDhyst
– under full software control
– in static safe reset
DD
value (guaranteed for
Figure
LVDf
, the MCU
40.