ST72F321J9TCTR STMicroelectronics, ST72F321J9TCTR Datasheet - Page 147
ST72F321J9TCTR
Manufacturer Part Number
ST72F321J9TCTR
Description
IC MCU 8BIT 60KB FLASH 44-TQFP
Manufacturer
STMicroelectronics
Series
ST7r
Datasheet
1.ST72F321AR7T6.pdf
(193 pages)
Specifications of ST72F321J9TCTR
Core Processor
ST7
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
32
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
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ST72F321J9TCTR
Manufacturer:
STMicroelectronics
Quantity:
10 000
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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.
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
V
DD
IN
S
)
=V
=5V
SS
LP: Low power oscillator
MP: Medium power oscillator
MS: Medium speed oscillator
HS: High speed oscillator
R
R
R
R
S
S
S
S
=200Ω
=200Ω
=200Ω
=100Ω
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...).
LP oscillator
MP oscillator
MS oscillator
HS oscillator
Conditions
ST72321Rx ST72321ARx ST72321Jx
LP oscillator
MP oscillator
MS oscillator
HS oscillator
Min
Typ
>2
>4
>8
20
22
22
18
15
160
310
610
1
80
Max
Max
16
40
56
46
33
33
150
250
460
910
2
4
8
147/193
S
MHz
Unit
Unit
kΩ
pF
μA
value.
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