參數(shù)資料
型號: ST52T301P
廠商: 意法半導(dǎo)體
英文描述: 8-Bit OTP/EPROM DuaLogic] MCUs WITH ADC, UART, TIMER, TRIAC & PWM DRIVER
中文描述: 8位檢察官辦公室/存儲器DuaLogic]與藝術(shù)發(fā)展局和UART,定時器,可控硅控制器
文件頁數(shù): 27/100頁
文件大小: 497K
代理商: ST52T301P
5 CLOCK
ST52x301 can work by using a 5, 10 or 20 MHz
clock.
TheST52x301ClockGeneratormodulegenerates
theinternalclock fortheinternal ControlUnit,ALU,
Fuzzy Core and on-chip peripherals and it is
designed to require a minimum of external
components.
Thesystemclockmaybe generatedbyusingeither
a quartz crystal, or a ceramic resonator
(CERALOC); or, at least, by means of an external
clock.
The different clock generator options connection
methodsare shown in Figure 5.1.
When an external clock is used, it must be
connectedon thepinOSCinwhileOSCoutmustbe
grounded.
The crystal oscillator start-up time is a function of
manyvariables:crystalparameters(especiallyR
S
),
oscillator load capacitance (CL), IC parameters,
ambient temperature,supplyvoltage.
It must be observed that the crystal or ceramic
leads and circuit connectionsmust be as short as
possible.Typical values for CL1, CL2 are 10pF for
a 20 MHzcrystal.
Figure5.1.Oscillator Connections
27/99
ST52T301/E301
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