參數(shù)資料
型號(hào)： ST6265BM1
廠商： 意法半導(dǎo)體
英文描述： 8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER, EEPROM AND SPI
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(yè)數(shù)： 18/74頁(yè)
文件大?。?/td> 538K
代理商： ST6265BM1
18/74
ST62T55B ST62T65B/E65B
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
).
8 illustrates various possible oscillator configura-
tionsusinganexternalcrystalorceramicresonator,
an externalclock input, an external resistor (R
NET
).
C
L1
an C
L2
should have a capacitance in therange
12to22pFforanoscillator frequencyinthe4-8MHz
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 in9.
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 8.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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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST6265BM1/XXX 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, SAFE RESET, AUTO-RELOAD TIMER, EEPROM AND SPI
ST6265BM3 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, SAFE RESET, AUTO-RELOAD TIMER, EEPROM AND SPI
ST6265BM3/XXX 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, SAFE RESET, AUTO-RELOAD TIMER, EEPROM AND SPI
ST6265BM6 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, SAFE RESET, AUTO-RELOAD TIMER, EEPROM AND SPI
ST6265BM6/XXX 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, SAFE RESET, AUTO-RELOAD TIMER, EEPROM AND SPI
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