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MC68HC908AP16CFB bảng dữ liệu(PDF) 91 Page - Motorola, Inc

tên linh kiện MC68HC908AP16CFB
Giải thích chi tiết về linh kiện  Microcontrollers
PDF  440 Pages
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nhà sản xuất  MOTOROLA [Motorola, Inc]
Trang chủ  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC68HC908AP16CFB bảng dữ liệu(HTML) 91 Page - Motorola, Inc

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MC68HC908AP Family — Rev. 2.5
Data Sheet
MOTOROLA
91
Data Sheet – MC68HC908AP Family
Section 7. Oscillator (OSC)
7.1 Introduction
The oscillator module consist of three types of oscillator circuits:
•
Internal oscillator
•
RC oscillator
•
32.768kHz crystal (x-tal) oscillator
The reference clock for the CGM and other MCU sub-systems is
selected by programming the mask option register located at $FFCF.
The reference clock for the timebase module (TBM) is selected by the
two bits, OSCCLK1 and OSCCLK0, in the CONFIG2 register.
The internal oscillator runs continuously after a POR or reset, and is
always available. The RC and crystal oscillator cannot run concurrently;
one is disabled while the other is selected; because the RC and x-tal
circuits share the same OSC1 pin.
NOTE:
The oscillator circuits are powered by the on-chip VREG regulator,
therefore, the output swing on OSC1 and OSC2 is from VSS to VREG.
Figure 7-1. shows the block diagram of the oscillator module.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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