STEVAL-IFS006V1 STMicroelectronics, STEVAL-IFS006V1 Datasheet - Page 36

• Manufacturer Part Number: STEVAL-IFS006V1
• Description: BOARD EVAL 8BIT MICRO + TDE1708
• Manufacturer: STMicroelectronics

Specifications of STEVAL-IFS006V1

• Design Resources: STEVAL-IFS006V1 Bill of Material
• Sensor Type: Proximity
• Interface: I²C
• Voltage - Supply: 6 V ~ 48 V
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ST7FLITEUS5, TDE1708
• Processor To Be Evaluated: ST7LITEUS5
• Data Bus Width: 8 bit
• Operating Supply Voltage: 6 V to 48 V
• Silicon Manufacturer: ST Micro
• Silicon Core Number: TDE1708DFT
• Kit Application Type: Sensing - Touch / Proximity
• Application Sub Type: Proximity Switch
• Kit Contents: Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensitivity: -
• Sensing Range: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-6403; STEVAL-IFS006V1

Supply, reset and clock management
6.4.2
6.4.3
6.4.4
36/136
Figure 12. Reset block diagram
1.
Asynchronous external RESET pin
The RESET pin is both an input and an open-drain output with integrated R
resistor. This pull-up has no fixed value but varies in accordance with the input voltage. It
can be pulled low by external circuitry to reset the device. See Electrical Characteristic
section for more details.
A RESET signal originating from an external source must have a duration of at least
t
therefore the MCU can enter reset state even in Halt mode.
The RESET pin is an asynchronous signal which plays a major role in EMS performance. In
a noisy environment, it is recommended to follow the guidelines mentioned in the electrical
characteristics section.
External Power-on reset
If the LVD is disabled by option byte, to start up the microcontroller correctly, the user must
ensure by means of an external reset circuit that the reset signal is held low until V
the minimum level specified for the selected f
A proper reset signal for a slow rising V
RC network connected to the RESET pin.
Internal low voltage detector (LVD) reset
Two different reset sequences caused by the internal LVD circuitry can be distinguished:
●
●
The device RESET pin acts as an output that is pulled low when V
V
The LVD filters spikes on V
h(RSTL)in
DD
Section 11.2.1: Illegal opcode reset
RESET
<V
Power-on reset
Voltage Drop reset
IT-
in order to be recognized (see
(falling edge) as shown in
V
DD
R
ON
DD
larger than t
for more details on illegal opcode reset conditions
FILTER
Figure
DD
Figure
GENERATOR
g(VDD)
supply can generally be provided by an external
13.
PULSE
CLKIN
13). This detection is asynchronous and
to avoid parasitic resets.
frequency.
WATCHDOG RESET
ILLEGAL OPCODE RESET
LVD RESET
ST7LITEUS2, ST7LITEUS5
DD
<V
INTERNAL
RESET
IT+
ON
(rising edge) or
weak pull-up
1)
DD
is over