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參數(shù)資料
| 型號(hào)： | ST6253BB1 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Replaced by PT78HT233 : 3.3Vout 2A Wide Input Positive Step-Down ISR 3-SIP MODULE -40 to 85 |
| 中文描述： | 8位檢察官辦公室/存儲(chǔ)器與阿微控制器/ D轉(zhuǎn)換器，自動(dòng)重加載定時(shí)器，EEPROM和的SPI |
| 文件頁數(shù)： | 18/75頁 |
| 文件大小： | 540K |
| 代理商： | ST6253BB1 |
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18/75
ST62T53B/T60B/T63B ST62E60B
3 CLOCKS, RESET, INTERRUPTS AND POWER SAVING MODES
3.1 CLOCK SYSTEM
The MCU features a Main Oscillator which can be
driven by an external clock, or used in conjunction
with an AT-cut parallel resonant crystal or a suita-
ble ceramic resonator, or with an external resistor
(R
NET
).
Figure 9 illustrates various possible oscillator con-
figurations using anexternal crystalorceramic res-
onator, an external clock input, an external resistor
(R
NET
).C
L1
anC
L2
should haveacapacitance inthe
range 12 to 22 pF for an oscillator frequency in the
4-8 MHz range.
Aprogrammable dividerisprovidedinordertoadjust
the internalclock of theMCUto thebest power con-
sumption and performance trade-off.
The internal MCU clock frequency (f
INT
) drives di-
rectly the AR TIMER while it is divided by 12 to
drive the TIMER, the A/D converter and the
Watchdog timer, and by 13 to drive the CPU core,
as may be seen inFigure 10.
With an 8MHz oscillator frequency, the fastest ma-
chine cycle is therefore 1.625
μ
s.
A machine cycleis the smallest unit of time needed
to execute anyoperation (forinstance, toincrement
the Program Counter). An instruction may require
two, four, or five machine cycles for execution.
3.1.1 Main Oscillator
The oscillator configuration may bespecified by se-
lectingtheappropriate option.WhentheCRYSTAL/
RESONATORoptionisselected,itmustbeusedwith
a quartz crystal, a ceramic resonator or an external
signalprovidedontheOSCinpin.WhentheRCNET-
WORK option is selected, the system clock is gen-
erated by an external resistor.
Figure 9.Oscillator Configurations
OSC
in
OSC
out
C
L1n
C
L2
ST6xxx
CRYSTAL/RESONATORCLOCK
CRYSTAL/RESONATOR option
OSC
in
OSC
out
ST6xxx
EXTERNAL CLOCK
CRYSTAL/RESONATOR option
NC
OSC
in
OSC
out
R
NET
ST6xxx
RC NETWORK
RC NETWORK option
NC
18
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| ST6253BM3 | 8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER, EEPROM AND SPI |
| ST6253BM1 | DIODE ZENER SINGLE 200mW 13Vz 5mA-Izt 0.022 0.1uA-Ir 10 SOD-323 3K/REEL |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST6253BB1/XXX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| ST6253BB3 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER, EEPROM AND SPI |
| ST6253BB3/XXX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| ST6253BB6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER, EEPROM AND SPI |
| ST6253BB6/XXX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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