ST72F344K4T6 STMicroelectronics, ST72F344K4T6 Datasheet - Page 210

• Manufacturer Part Number: ST72F344K4T6
• Description: MCU 8BIT 16KB FLASH MEM 32-LQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F344K4T6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, LIN, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• Processor Series: ST72F3x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: I2C, SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 34
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST72F34X-SK/RAIS, ST7MDT40-EMU3, STX-RLINK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• For Use With: 497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5611

Electrical characteristics
13.6.1
210/247
Table 97.
Crystal and ceramic resonator oscillators
The ST7 internal clock can be supplied with four different Crystal/Ceramic resonator
oscillators. All the information given in this paragraph is based on characterization results
with specified typical external components. In the application, the resonator and the load
capacitors have to be placed as close as possible to the oscillator pins in order to minimize
output distortion and startup stabilization time. Refer to the crystal/ceramic resonator
manufacturer for more details (frequency, package, accuracy, etc.).
Table 98.
1. The oscillator selection can be optimized in terms of supply current using an high quality resonator with
2. Data based on characterisation results, not tested in production. The relatively low value of the RF
3. For C
f
t
f
R
C
C
i
Symbol
2
AWU
RCSRT
OSC
F
L1
L2
Symbol
small R
resistor, offers a good protection against issues resulting from use in a humid environment, due to the
induced leakage and the bias condition change. However, it is recommended to take this point into
account if the µC is used in tough humidity conditions.
designed for high-frequency applications and selected to match the requirements of the crystal or
resonator. C
capacitance which is the series combination of C
included when sizing C
capacitance).
L1
S
Oscillator frequency
Feedback resistor
Recommended load capacitance versus
equivalent serial resistance of the
crystal or ceramic resonator (R
OSC2 driving current
and C
value. Refer to crystal/ceramic resonator manufacturer for more details.
Auto-wakeup from Halt oscillator (AWU) characteristics
Crystal/ceramic resonator oscillator characteristics
AWU oscillator frequency
AWU oscillator startup time
L1
L2
and C
it is recommended to use high-quality ceramic capacitors in the 5-pF to 25-pF range (typ.)
L2,
L1
are usually the same size. The crystal manufacturer typically specifies a load
Parameter
Parameter
and C
(2)
(1)
L2
Doc ID 12321 Rev 5
(10 pF can be used as a rough estimate of the combined pin and board
S
)
(3)
L1
Conditions
and C
See
f
CL1 = CL2 = 68 pF
f
CL1 = CL2 = 68 pF
f
CL1 = CL2 = 40 pF
f
CL1 = CL2 = 20 pF
OSC
OSC
OSC
OSC
L2
. PCB and MCU pin capacitance must be
= 2 MHz, C0 = 6 pF,
= 4 MHz, C0 = 6 pF,
= 8 MHz, C0 = 6 pF,
= 16 MHz, C0 = 7 pF,
Table 99
Conditions
Min
50
below
Typ
125
ST72344xx ST72345xx
Min
426
425
456
660
20
1
Max
250
50
Max
16
40
Unit
kHz
µs
MHz
Unit
µA
kΩ
pF