STEVAL-ISQ002V1 STMicroelectronics, STEVAL-ISQ002V1 Datasheet - Page 129

• Manufacturer Part Number: STEVAL-ISQ002V1
• Description: BOARD EVAL BASED ON ST72264G1
• Manufacturer: STMicroelectronics

Specifications of STEVAL-ISQ002V1

• Main Purpose: Interface, PMBus
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ST72F264
• Primary Attributes: The PMBus™ Interface Using the ST7 I2C Peripheral
• Secondary Attributes: Firmware in C Language
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6423

OPERATING CONDITIONS (Cont’d)
13.3.2 Operating Conditions with Low Voltage Detector (LVD)
T
Notes:
1. Data based on characterization results, not tested in production.
2. When Vt
V
3. Use of LVD with capacitive power supply: with this type of power supply, if power cuts occur in the application, it is
recommended to pull V
151
.
Figure 65. LVD Startup Behaviour
Note: When the LVD is enabled, the MCU reaches its authorized operating voltage from a reset state.
However, in some devices, the reset signal may be undefined until V
quence, the I/Os may toggle when V
Because Flash write access is impossible below this voltage, the Flash memory contents will not be cor-
rupted.
V
V
V
Vt
t
A
IT+(LVD)
g(VDD)
Symbol
IT+(LVD)
IT-(LVD)
hys(LVD)
POR
= -40 to +85°C unless otherwise specified
Reset state
not defined
in this area
and note 6.
threshold.
POR
Reset release threshold
(V
Reset generation threshold
(V
LVD voltage threshold hysteresis
V
Filtered glitch delay on V
DD
DD
DD
is faster than 100 µs/V, the Reset signal is released after a delay of max. 42µs after V
2V
rise time rate
5V
V
rise)
fall)
IT+
DD
Parameter
down to 0V to ensure optimum restart conditions. Refer to circuit example in
1)2)3)
DD
1)
DD
is below this voltage.
High Threshold
Med. Threshold
Low Threshold
High Threshold
Med. Threshold
Low Threshold
V
Flash
ROM
Not detected by the LVD
IT+(LVD)
-V
Conditions
IT-(LVD)
ST72260Gx, ST72262Gx, ST72264Gx
DD
is approximately 2V. As a conse-
20µs/V
20µs/V
3.55
2.95
4.0
3.75
2.75
t
Min
3.3
1)
1)
1)
LVD RESET
Typ
3.75
3.15
3.55
200
4.2
4.0
3.0
20ms/V
Figure 91 on page
4.25
3.75
3.15
Max
3.35
∞
4.5
4.0
40
DD
1)
1)
1)
crosses the
129/172
Unit
mV
ns
V