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| 型號(hào)： | ST624XB-KIT |
| 英文描述： | STARTER KIT DATASHEET FOR ST624X |
| 中文描述： | 入門套件小冊(cè)子的ST624X |
| 文件頁(yè)數(shù)： | 18/74頁(yè) |
| 文件大小： | 733K |
| 代理商： | ST624XB-KIT |
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ST62T46B/E46B
3 CLOCKS, RESET, INTERRUPTS AND POWER SAVING MODES
3.1 CLOCK SYSTEM
3.1.1 Main Oscillator
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.
Figure 8
illustrates various possible oscillator con-
figurations using an external crystal or ceramic res-
onator, an external clock input. C
L1
an C
L2
should
have a capacitance in the range 12 to 22 pF for an
oscillator frequency in the 4-8 MHz range.
The internal MCU clock Frequency (F
INT
) is divid-
ed by 13 to drive the CPU core and by 12 to drive
the A/D converter and the watchdog timer, while
clock used to drive on-chip peripherals depends
on the peripheral as shown in the clock circuit
block diagram.
With an 8MHz oscillator frequency, the fastest ma-
chine cycle is therefore 1.625μs.
A machine cycle is the smallest unit of time needed
to execute any operation (for instance, to increment
the Program Counter). An instruction may require
two, four, or five machine cycles for execution.
Figure 8. Oscillator Configurations
Figure 9. Clock Circuit Block Diagram
OSC
in
OSC
out
C
L1n
C
L2
ST6xxx
CRYSTAL/RESONATOR CLOCK
OSC
in
OSC
out
ST6xxx
EXTERNAL CLOCK
NC
VA0016
VA0015A
MAIN
OSCILLATOR
Core
: 13
: 12
Timer 1 & 2
Watchdog
POR
f
INT
ADC
OSCin
OSCout
f
OSC
f
INT
OSC32in
OSC32out
32kHz
OSCILLATOR
MUX
LCD
CONTROLLER
DRIVER
EOCR bit 5
(START/STOP)
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| ST6242B | 8-BIT MICROCONTROLLER ( MCU ) WITH OTP. ROM. FASTROM. EPROM. LCD DRIVER. EEPROM. A/D CONVERTER AND 64 PINS |
| ST62E45BG1 | 8-BIT MICROCONTROLLER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST624XB-KIT/110 | 功能描述:開發(fā)板和工具包 - 其他處理器 ST624X Starter Kit RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評(píng)估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
| ST624XB-KIT/UK | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:ST62 KIT |
| ST6252 | 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 AND EEPROM |
| ST6252BB1 | 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 AND EEPROM |
| ST6252BB1/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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