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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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38K2 데이터시트(PDF) 29 Page - Renesas Technology Corp |
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38K2 데이터시트(HTML) 29 Page - Renesas Technology Corp |
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29 / 358 page  FUNCTIONAL DESCRIPTION Rev.2.00 Oct 15, 2006 page 10 of 130 38K2 Group REJ09B0338-0200 HARDWARE [CPU Mode Register (CPUM)] 003B16 The CPU mode register contains the stack page selection bit and the internal system clock selection bit. The CPU mode register is allocated at address 003B16. Fig. 7 Structure of CPU mode register Processor mode bits b1b0 00 : Single-chip mode 01 : 10 : Not available 11 : Stack page selection bit 0 : 0 page 1 : 1 page Not used (returns “1” when read) (Do not write “0” to this bit) Not used (returns “0” when read) (Do not write “1” to this bit) System clock selection bit 0 : Main clock (XIN) 1 : fSYN System clock division ratio selection bits b7b6 00 : φ = f(system clock)/8 (8-divide mode) 01 : φ = f(system clock)/4 (4-divide mode) 10 : φ = f(system clock)/2 (2-divide mode) 11 : φ = f(system clock) (Through mode) CPU mode register (CPUM : address 003B16) b7 b0 1 0 |
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