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M38278M2MXXXFS Datasheet(PDF) 8 Page - Mitsubishi Electric Semiconductor |
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M38278M2MXXXFS Datasheet(HTML) 8 Page - Mitsubishi Electric Semiconductor |
8 / 70 page 8 SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER 3827 Group MITSUBISHI MICROCOMPUTERS Not available Processor mode bits b1 b0 0 0 : Single-chip mode 0 1 : 1 0 : 1 1 : Stack page selection bit 0 : 0 page 1 : 1 page Not used (returns “1” when read) (Do not write “0” to this bit.) Port XC switch bit 0 : Stop oscillating 1 : XCIN, XCOUT Main clock ( XIN-XOUT) stop bit 0 : Oscillating 1 : Stopped Main clock division ratio selection bit 0 : XIN/2 (high-speed mode) 1 : XIN/8 (middle-speed mode) Internal system clock selection bit 0 : XIN-XOUT selected (middle-/high-speed mode) 1 : XCIN-XCOUT selected (low-speed mode) CPU mode register (CPUM (CM) : address 003B16) b7 b0 FUNCTIONAL DESCRIPTION Central Processing Unit (CPU) The 3827 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 instruction cannot be used. The STP, WIT, MUL, and DIV instruction can be used. [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. 6 Structure of CPU mode register |
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