ST72F325K4T6 STMicroelectronics, ST72F325K4T6 Datasheet - Page 150

• Manufacturer Part Number: ST72F325K4T6
• Description: MCU 8BIT 16KB FLASH/ROM 32-LQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F325K4T6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 3.8 V ~ 5.5 V
• Data Converters: A/D 16x10b
• 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: 512 B
• Interface Type: I2C, SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 48
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7232X-EVAL, ST7232X-SK/RAIS, ST72325-D/RAIS, ST7MDT20-DVP3, ST7MDT20J-EMU3, ST7MDT20M-EMU3, STX-RLINK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 16 Channel
• For Use With: 497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 497-5605

ST72325xx
CLOCK AND TIMING CHARACTERISTICS (Cont’d)
12.5.3 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 ex-
ternal components. In the application, the resona-
tor and the load capacitors have to be placed as
Notes:
1. The oscillator selection can be optimized in terms of supply current using an high quality resonator with small R
Refer to crystal/ceramic resonator manufacturer for more details.
2. Data based on characterisation results, not tested in production.
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f
R
C
C
i
2
OSC
Symbol
Symbol
F
L1
L2
Oscillator Frequency
Feedback resistor
Recommended load capacitance ver-
sus equivalent serial resistance of the
crystal or ceramic resonator (R
OSC2 driving current
Parameter
Parameter
2)
1)
V
f
f
f
f
OSC
OSC
OSC
OSC
DD
S
)
3)
=5V:
= 2MHz, C0 = 6pF, Cl1 = Cl2 = 68pF
= 4MHz, C0 = 6pF, Cl1 = Cl2 = 68pF
= 8MHz, C0 = 6pF, Cl1 = Cl2 = 40pF
= 16MHz, C0 = 7pF, Cl1 = Cl2 = 20pF
f
f
f
f
OSC
OSC
OSC
OSC
= 1 to 2 MHz
= 2 to 4 MHz
= 4 to 8 MHz
= 8 to 16 MHz
Conditions
close as possible to the oscillator pins in order to
minimize output distortion and start-up stabiliza-
tion time. Refer to the crystal/ceramic resonator
manufacturer for more details (frequency, pack-
age, accuracy...).
Conditions
Min
Typ
20
20
20
15
15
426
425
456
660
1
Max
Max
16
40
60
50
35
35
S
MHz
Unit
Unit
kΩ
pF
µA
value.