ST72F623F2M1 STMicroelectronics, ST72F623F2M1 Datasheet - Page 108

• Manufacturer Part Number: ST72F623F2M1
• Description: IC MCU 8BIT LS 8K 20-SOIC
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F623F2M1

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: USB
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 11
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 3x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 20-SOIC (7.5mm Width)
• Processor Series: ST72F6x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 384 B
• Interface Type: SCI, SPI, USB
• Maximum Clock Frequency: 12 MHz
• Number Of Programmable I/os: 11
• Number Of Timers: 2
• Operating Supply Voltage: 4 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• On-chip Adc: 10 bit
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 497-2114-5

12.7 EMC CHARACTERISTICS
Susceptibility tests are performed on a sample ba-
sis during product characterization.
12.7.1
Susceptibility)
Based on a simple running application on the
product (toggling 2 LEDs through I/O ports), the
product is stressed by two electromagnetic events
until a failure occurs (indicated by the LEDs).
■
■
A device reset allows normal operations to be re-
sumed. The test results are given in the table be-
low based on the EMS levels and classes defined
in application note AN1709.
12.7.1.1 Designing hardened software to avoid
noise problems
EMC characterization and optimization are per-
formed at component level with a typical applica-
12.7.2 Electromagnetic Interference (EMI)
Based on a simple application running on the
product (toggling 2 LEDs through the I/O ports),
the product is monitored in terms of emission. This
emission test is in line with the norm SAE J 1752/
3 which specifies the board and the loading of
each pin.
Notes:
1. Data based on characterization results, not tested in production.
108/139
Symbol
Symbol
ESD: Electrostatic Discharge (positive and
negative) is applied on all pins of the device until
a functional disturbance occurs. This test
conforms with the IEC 1000-4-2 standard.
FTB: A Burst of Fast Transient voltage (positive
and negative) is applied to V
a 100pF capacitor, until a functional disturbance
occurs. This test conforms with the IEC 1000-4-
4 standard.
V
V
S
FESD
FFTB
EMI
Functional
Voltage limits to be applied on any I/O pin to induce a
functional disturbance
Fast transient voltage burst limits to be applied
through 100pF on V
tional disturbance
Peak level
Parameter
EMS
DD
Parameter
DD
and V
(Electromagnetic
V
PDIP42 package,
conforming to SAE J 1752/3
and V
DD
SS
=5V, T
pins to induce a func-
SS
Conditions
through
A
=+25°C,
Doc ID 6996 Rev 5
tion environment and simplified MCU software. It
should be noted that good EMC performance is
highly dependent on the user application and the
software in particular.
Therefore it is recommended that the user applies
EMC software optimization and prequalification
tests in relation with the EMC level requested for
his application.
Software recommendations:
The software flowchart must include the manage-
ment of runaway conditions such as:
– Corrupted program counter
– Unexpected reset
– Critical Data corruption (control registers...)
Prequalification trials:
Most of the common failures (unexpected reset
and program counter corruption) can be repro-
duced by manually forcing a low state on the RE-
SET pin or the Oscillator pins for 1 second.
To complete these trials, ESD stress can be ap-
plied directly on the device, over the range of
specification values. When unexpected behaviour
is detected, the software can be hardened to pre-
vent unrecoverable errors occurring (see applica-
tion note AN1015).
0.1MHz to 30MHz
30MHz to 130MHz
130MHz to 1GHz
SAE EMI Level
V
conforms to IEC 1000-4-2
V
conforms to IEC 1000-4-4
Frequency Band
DD
DD
=5V, T
=5V, T
Monitored
A
A
=+25°C, PDIP42, f
=+25°C, PDIP42, f
Conditions
Max vs. [f
6/4MHz
35
42
28
4
CPU
CPU
OSC
12/8MHz
=8MHz
=8MHz
4.5
/f
38
45
32
CPU
]
Level/
Class
dBμV
Unit
2B
2B
-