參數(shù)資料
型號： ST72124J2T
廠商： 意法半導(dǎo)體
英文描述： 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
中文描述： 8位單電壓閃存，ADC和16位定時器，SPI和脊髓損傷界面微控制器
文件頁數(shù)： 120/153頁
文件大?。?/td> 1533K
代理商： ST72124J2T
ST72334J/N, ST72314J/N, ST72124J
120/153
CLOCK CHARACTERISTICS
(Cont’d)
16.5.4 RC Oscillators
The ST7 internal clock can be supplied with an RC
oscillator. This oscillator can be used with internal
or external components (selectable by option
byte).
Figure 70. Typical Application with RC oscillator
Figure 71. Typical Internal RC Oscillator
Figure 72. Typical External RC Oscillator
Notes:
1. Data based on characterization results.
2. Guaranteed frequency range with the specified C
EX
and R
EX
ranges taking into account the device process variation.
Data based on design simulation.
3. Data based on characterization results done with V
DD
nominal at 5V, not tested in production.
4. R
EX
must have a positive temperature coefficient (ppm/°C), carbon resistors should therefore not be used.
5.
Important:
when no external C
is applied, the capacitance to be considered is the global parasitic capacitance which
is subject to high variation (package, application...). In this case, the RC oscillator frequency tuning has to be done by
trying out several resistor values.
Symbol
Parameter
Conditions
Min
3.60
1
Typ
Max
5.10
14
Unit
f
OSC
Internal RC oscillator frequency
1)
External RC oscillator frequency
2)
Internal RC Oscillator Start-up Time
3)
see
Figure 71
MHz
t
SU(OSC)
2.0
1.0
6.5
0.7
3.0
ms
External RC Oscillator Start-up Time
3)
R
EX
=47K
,
C
EX
=”0”pF
R
EX
=47K
,
C
EX
=100pF
R
EX
=10K
,
C
EX
=6.8pF
R
EX
=10K
,
C
EX
=470pF
R
EX
C
EX
Oscillator external resistor
4)
Oscillator external capacitor
see
Figure 72
10
0
5)
47
470
K
pF
OSC1
OSC2
f
OSC
C
EX
R
EX
EXTERNAL RC
INTERNAL RC
V
REF
+
-
V
DD
Current copy
Voltage generator
C
EX
discharge
ST72XXX
3.2
5.5
VDD [V]
3.8
3.9
4
4.1
4.2
4.3
fosc [MHz]
-40°C
+25°C
+85°C
+125°C
0
6.8
22
47
100
270
470
Cex [pF]
0
5
10
15
20
fosc [MHz]
Rex=10KOhm
Rex=15KOhm
Rex=22KOhm
Rex=33KOhm
Rex=39KOhm
Rex=47KOhm
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST72124J2T1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
ST72124J2T1/XXX 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
ST72124J2T3 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
ST72124J2T3/XXX 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
ST72124J2T6 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
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