ST72F561K9TA STMicroelectronics, ST72F561K9TA Datasheet - Page 24

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ST72F561K9TA

Manufacturer Part Number
ST72F561K9TA
Description
IC MCU 8BIT 60K FLASH 32-LQFP
Manufacturer
STMicroelectronics
Series
ST7r
Datasheet

Specifications of ST72F561K9TA

Core Processor
ST7
Core Size
8-Bit
Speed
8MHz
Connectivity
CAN, LINSCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
24
Program Memory Size
60KB (60K x 8)
Program Memory Type
FLASH
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
3.8 V ~ 5.5 V
Data Converters
A/D 16x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
32-LQFP
For Use With
497-8374 - BOARD DEVELOPMENT FOR ST72F561
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-

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ST72561
RESET SEQUENCE MANAGER (Cont’d)
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 characteris-
tics section.
6.3.3 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
level specified for the selected f
A proper reset signal for a slow rising V
can generally be provided by an external RC net-
work connected to the RESET pin.
Figure 14. RESET Sequences
24/265
WATCHDOG
RESET
EXTERNAL
RESET
SOURCE
RESET PIN
V
V
IT+(LVD)
IT-(LVD)
V
RUN
DD
DD
is over the minimum
ACTIVE PHASE
OSC
RESET
LVD
frequency.
DD
supply
RUN
t
h(RSTL)in
6.3.4 Internal Low Voltage Detector (LVD)
RESET
Two different RESET sequences caused by the in-
ternal 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
avoid parasitic resets.
6.3.5 Internal Watchdog RESET
The RESET sequence generated by a internal
Watchdog counter overflow is shown in
Starting from the Watchdog counter underflow, the
device RESET pin acts as an output that is pulled
low during at least t
DD
Power-On RESET
Voltage Drop RESET
WATCHDOG UNDERFLOW
PHASE
ACTIVE
EXTERNAL
< V
RESET
IT-
(falling edge) as shown in
INTERNAL RESET (256 or 4096 T
VECTOR FETCH
RUN
w(RSTL)out
DD
ACTIVE
PHASE
WATCHDOG
< V
RESET
t
DD
w(RSTL)out
IT+
.
larger than t
(rising edge) or
RUN
Figure
CPU
Figure
)
g(VDD)
3.
3.
to

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