ST92F120V1Q7 STMicroelectronics, ST92F120V1Q7 Datasheet - Page 8

• Manufacturer Part Number: ST92F120V1Q7
• Description: Microcontrollers (MCU) Flash 128K SPI/I2C
• Manufacturer: STMicroelectronics

Specifications of ST92F120V1Q7

• Data Bus Width: 8 bit, 16 bit
• Program Memory Type: Flash
• Program Memory Size: 128 KB
• Data Ram Size: 4 KB
• Interface Type: I2C, SPI
• Maximum Clock Frequency: 24 MHz
• Number Of Programmable I/os: 77
• Number Of Timers: 5
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Package / Case: PQFP-100
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 16 Channel
• Lead Free Status / Rohs Status: No

ST92F120 - GENERAL DESCRIPTION
voltage drop across the SCR parasitic resistor, the
SCR may be turned on; to turn off the SCR it is
necessary to remove the power supply from the
device.
The present ST9 design implements layout and
process solutions to decrease the effects of elec-
trostatic discharges (ESD) and latchup. Of course
it is not possible to test all devices, due to the de-
structive nature of the mechanism; in order to
guarantee product reliability, destructive tests are
carried out on groups of devices, according to
STMicroelectronics internal Quality Assurance
standards and recommendations.
1.2.4.2 Protective Interface
Although ST9 input/output circuitry has been de-
signed taking ESD and Latchup problems into ac-
Figure 3. Digital Input/Output - Push-Pull
8/324
1
P IN
ESD PROTECTION
CIRCUITRY
I/O CIRCUITRY
P
N
count, for those applications and systems where
ST9 pins are exposed to illegal voltages and high
current injections, the user is strongly recommend-
ed to implement hardware solutions which reduce
the risk of damage to the microcontroller: low-pass
filters and clamp diodes are usually sufficient in
preventing stress conditions.
The risk of having out-of-range voltages and cur-
rents is greater for those signals coming from out-
side the system, where noise effect or uncon-
trolled spikes could occur with higher probability
than for the internal signals; it must be underlined
that in some cases, adoption of filters or other ded-
icated interface circuitries might affect global mi-
crocontroller performance, inducing undesired tim-
ing delays, and impacting the global system
speed.
P
O U TP U T
PORT CIRCUITRY
B U FFE R
E N
N
P
N
E N
B U FFE R
IN P U T
P