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M32C/8B bảng dữ liệu(PDF) 97 Page - Renesas Technology Corp

tên linh kiện M32C/8B
Giải thích chi tiết về linh kiện  RENESAS MCU M16C FAMILY / M32C/80 SERIES
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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M32C/8B bảng dữ liệu(HTML) 97 Page - Renesas Technology Corp

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Under development
M32C/8B Group
9. Clock Generation Circuits
Preliminary specification
Specifications in this manual are tentative and subject to change.
REJ09B0450-0050 Rev.0.50 Oct 31, 2008
Page 80 of 385
Figure 9.14
Procedure to Use PLL Clock as CPU Clock Source
Start
End
PLC0 register: bits PLC05 and PLC04
PLC0 register: bits PLC02 to PLC00
PRCR register: PRC0 bit = 1
PLC0 register: PLC07 bit = 1
CM1 register : CM17 bit = 1
PRC0 bit = 0
Wait for tsu(PLL)
Enable writing to registers associated with clocks
CM2 register: CM21 bit = 0
CM0 register: CM07 bit = 0
Select the main clock as the CPU clock source
(Set after a main clock oscillation stabilizes)
Select the reference clock division rate for the PLL clock
Select the PLL clock multiplication factor
PLL runs
Select the PLL clock as the clock source for the CPU clock
and peripheral function clock
Disable writing to registers associated with clocks
Wait for PLL frequency synthesizer to stabilize



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