ST7FLITEUS5B6 STMicroelectronics, ST7FLITEUS5B6 Datasheet - Page 43

• Manufacturer Part Number: ST7FLITEUS5B6
• Description: MCU 8BIT 1KB FLASH 128KB 8-DIP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST7FLITEUS5B6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 5
• Program Memory Size: 1KB (1K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Controller Family/series: ST7
• No. Of I/o's: 5
• Ram Memory Size: 128Byte
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Rohs Compliant: Yes
• For Use With: 497-6403 - BOARD EVAL 8BIT MICRO + TDE1708497-6407 - BOARD EVAL FOR VACUUM CLEANER497-5861 - EVAL BRD POWER MOSFET/8PIN MCU497-5858 - EVAL BOARD PLAYBACK ST7FLITE497-5515 - EVAL BOARD PHASE CTRL DIMMER497-5049 - KIT STARTER RAISONANCE ST7FLITE497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -
• Other names: 497-5636-5

ST7LITEUS2, ST7LITEUS5
7.4
Note:
7.4.1
Note:
Caution:
System integrity management (SI)
The System Integrity Management block contains the low voltage detector (LVD) and
Auxiliary Voltage Detector (AVD) functions. It is managed by the SICSR register.
A reset can also be triggered following the detection of an illegal opcode or prebyte code.
Refer to
Low voltage detector (LVD)
The low voltage detector function (LVD) generates a static reset when the V
voltage is below a V
as the power-down keeping the ST7 in reset.
The V
for power-on 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
●
●
The LVD function is illustrated in
The voltage threshold can be configured by option byte to be low, medium or high. See
Section 14.1: Option
Provided the minimum V
the MCU can only be in two modes:
●
●
In these conditions, secure operation is always ensured for the application without the need
for external reset hardware.
During a low voltage detector reset, the RESET pin is held low, thus permitting the MCU to
reset other devices.
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
conditions. Refer to circuit example in
The LVD is an optional function which can be selected by option byte. See
page
disabled, an external circuitry must be used to ensure a proper Power-on reset.
It is recommended to make sure that the V
device is exiting from Reset, to ensure the application functions properly.
Make sure the right combination of LVD and AVD thresholds is used as LVD and AVD levels
are not correlated. Refer to
If an LVD reset occurs after a watchdog reset has occurred, the LVD will take priority and will
clear the watchdog flag.
V
V
Under full software control
In static safe reset
123. It allows the device to be used without any external RESET circuitry. If the LVD is
IT-(LVD)
IT+(LVD)
IT-(LVD)
Section 11.2.1: Illegal opcode reset
reference value for a voltage drop is lower than the V
when V
when V
IT-(LVD)
DD
bytes.
DD
is falling
DD
is rising
reference value. This means that it secures the power-up as well
value (guaranteed for the oscillator frequency) is above V
Table 47 on page 95
Figure
Figure 62
15.
DD
for further details.
DD
supply voltage rises monotonously when the
and note 4.
and
down to 0V to ensure optimum restart
DD
Table 48 on page 96
is below:
IT+(LVD)
reference value
for more details.
Section 14.1 on
DD
supply
Interrupts
IT-(LVD)
43/136
,