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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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MB91F467BA 数据表(PDF) 39 Page - Cypress Semiconductor |
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MB91F467BA 数据表(HTML) 39 Page - Cypress Semiconductor |
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39 / 127 page  MB91460B Series Document Number: 002-04608 Rev. *A Page 38 of 126 8.4.7 TBR (Table Base Register) The table base register stores the starting address of the vector table used in EIT processing. The initial value at reset is 000FFC00H. 8.4.8 RP (Return Pointer) The return pointer stores the address for return from subroutines. During execution of a CALL instruction, the PC value is transferred to this RP register. During execution of a RET instruction, the contents of the RP register are transferred to PC. The initial value at reset is undefined. 8.4.9 USP (User Stack Pointer) The user stack pointer, when the S flag is “1”, this register functions as the R15 register. ■ The USP register can also be explicitly specified. The initial value at reset is undefined. ■ This register cannot be used with RETI instructions. 8.4.10 Multiply & Divide Registers These registers are for multiplication and division, and are each 32 bits in length. The initial value at reset is undefined. bit 0 bit 31 000FFC00H Initial value bit 0 bit 31 XXXXXXXXH Initial value bit 0 bit 31 XXXXXXXXH Initial value bit 0 MDL bit 31 MDH |
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