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7630 Datasheet(PDF) 26 Page - Renesas Technology Corp |
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7630 Datasheet(HTML) 26 Page - Renesas Technology Corp |
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26 / 238 page  1-10 7630 Group User’s Manual +$5':$5( FUNCTIONAL DESCRIPTION Central Processing Unit (CPU) The core of 7630 group microcomputers is the 7600 series CPU. This core is based on the standard instruction set of 740 series; however the performance is improved by allowing to execute the same instruc- tions as that of the 740 series in less cycles. Refer to the 7600 Series Software Manual for details of the instruction set. CPU Mode Register CPUM The CPU mode register contains the stack page selection bit and internal system clock selection bit. The CPU mode register is allo- cated to address 000016. Fig. 7 Structure of CPU mode register CPU mode register (address 000016) CPUM Processor mode bits (set these bits to “00”) b1 b0 0 0 : Single–chip mode 0 1 : Not used 1 0 : Not used 1 1 : Not used Stack page selection bit 0 : 0 page 1 : 1 page Not used (“0” when read, do not write “1”) Internal system clock selection bit 0 : φ=f(X IN) divided by 2 (high–speed mode) 1 : φ=f(X IN) divided by 8 (middle–speed mode) Not used (“0” when read, do not write “1”) 70 FUNCTIONAL DESCRIPTION |
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