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M38862MC-XXXHP Datasheet(PDF) 10 Page - Renesas Technology Corp |
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M38862MC-XXXHP Datasheet(HTML) 10 Page - Renesas Technology Corp |
10 / 111 page 9 3886 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER MITSUBISHI MICROCOMPUTERS FUNCTIONAL DESCRIPTION CENTRAL PROCESSING UNIT (CPU) The 3886 group uses the standard 740 Family instruction set. Re- fer to the table of 740 Family addressing modes and machine instructions or the 740 Family Software Manual for details on the instruction set. Machine-resident 740 Family instructions are as follows: The FST and SLW instructions cannot be used. The STP, WIT, MUL, and DIV instructions can be used. [CPU Mode Register (CPUM)] 003B16 The CPU mode register contains the stack page selection bit, the processor mode bits specifying the chip operation mode, etc. The CPU mode register is allocated at address 003B16. Fig. 7 Structure of CPU mode register CPU mode register (CPUM : address 003B16) b7 b0 Stack page selection bit 0 : 0 page 1 : 1 page Reserved (Do not write “0” to this bit when using XCIN–XCOUT oscillation function.) Processor mode bits b1 b0 0 0 : Single-chip mode 0 1 : Memory expansion mode (Note) 1 0 : Microprocessor mode (Note) 1 1 : Not available Port XC switch bit 0 : I/O port function (stop oscillating) 1 : XCIN–XCOUT oscillating function Main clock (XIN–XOUT) stop bit 0 : Oscillating 1 : Stopped Main clock division ratio selection bits b7 b6 0 0 : φ = f(XIN)/2 (high-speed mode) 0 1 : φ = f(XIN)/8 (middle-speed mode) 1 0 : φ = f(XCIN)/2 (low-speed mode) 1 1 : Not available Note: This mode is not available for M38869M8A/MCA/MFA and the flash memory version. |
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