ST72215G2 STMicroelectronics, ST72215G2 Datasheet - Page 106

• Manufacturer Part Number: ST72215G2
• Description: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY,ADC, 16-BIT TIMERS, SPI, I2C INTERFACES
• Manufacturer: STMicroelectronics

Specifications of ST72215G2

• Emulation Voltage: 5.5 V

ST72104Gx, ST72215Gx, ST72216Gx, ST72254Gx
CLOCK AND TIMING CHARACTERISTICS (Cont’d)
13.5.3 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 are based
on characterization results with specified typical
external components. In the application, the reso-
nator and the load capacitors have to be placed as
13.5.3.1 Typical Crystal Resonators
Figure 64. Typical Application with a Crystal Resonator
Notes:
1. Resonator characteristics given by the crystal manufacturer.
2. t
quick V
3. The oscillator selection can be optimized in terms of supply current using an high quality resonator with small R
Refer to crystal manufacturer for more details.
106/141
Config.
Option
f
R
C
C
i
2
OSC
Byte
Symbol
F
L1
L2
MP
MS
HS
LP
SU(OSC)
DD
ramp-up from 0 to 5V (<50µs).
is the typical oscillator start-up time measured between V
S-200-30-30/50
SS3-400-30-30/30
SS3-800-30-30/30
SS3-1600-30-30/30
Oscillator Frequency
Feedback resistor
Recommended load capacitance ver-
sus equivalent serial resistance of the
crystal or ceramic resonator (R
OSC2 driving current
Reference
C
L2
Parameter
C
L1
3)
16MHz ∆f
Freq.
2MHz ∆f
4MHz ∆f
8MHz ∆f
RESONATOR
S
)
OSC
OSC
OSC
OSC
=[±30ppm
=[±30ppm
=[±30ppm
=[±30ppm
LP: Low power oscillator
MP: Medium power oscillator
MS: Medium speed oscillator
HS: High speed oscillator
R
R
R
R
V
V
OSC1
OSC2
DD
IN
S
S
S
S
=200Ω
=200Ω
=200Ω
=100Ω
=V
=5V
SS
25°C
25°C
25°C
25°C
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...).
Characteristic
Conditions
,±30ppm
,±30ppm
,±30ppm
,±30ppm
R
F
DD
=2.8V and the fetch of the first instruction (with a
LP oscillator
MP oscillator
MS oscillator
HS oscillator
LP oscillator
MP oscillator
MS oscillator
HS oscillator
∆Ta
∆Ta
∆Ta
∆Ta
i
], Typ. R
], Typ. R
], Typ. R
], Typ. R
2
1)
S
S
S
S
=200Ω
=60Ω
=25Ω
=15Ω
Min
110
180
400
>2
>4
>8
20
38
32
18
15
40
1
ST72XXX
f
OSC
Max
100
190
360
700
16
40
56
46
26
21
C
[pF]
2
4
8
33
33
33
33
L1
[pF]
C
34 10~15
34
34
34
L2
S
MHz
Unit
kΩ
pF
µA
t
value.
[ms]
SU(osc)
2.5~3
1~1.5
7~10
2)