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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ZLR64400ROMMCU 데이터시트(PDF) 39 Page - Zilog, Inc. |
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ZLR64400ROMMCU 데이터시트(HTML) 39 Page - Zilog, Inc. |
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39 / 155 page  PS024502-1205 P R E L I M I N A R Y Register File ZLR64400 ROM MCU Product Specification 29 Register File This device features 1056 bytes of register file space, organized in 256-byte banks. Bank 0 contains 237 bytes of RAM addressed as general-purpose registers, 4 port addresses (of which one is reserved), and 16 control register addresses. Banks 1, 2, and 3 each contain 256 general-purpose register bytes. Banks D and F each contain 16 addresses for control registers. All other banks are reserved and must not be selected. The current bank is selected for 8-bit direct or indirect addressing by writing Register Pointer bits RP[3:0]. In the current bank, a 16-byte working register group (addressed as R0R15) is selected by writing RP[7:4]. A working register operand requires only 4 bits of program memory. There are 16 working register groups per bank. See Figure 9 on page 31 and Figure 10 on page 32. Figure 8. Program/Constant Memory Map Program IRQ 05 or 000Ch (Reset) ROM Memory Vectors 0000h = 16-bit Address Not to Scale Constants FFFFh |
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