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AT89C51CC02CA-RATUM 数据表(PDF) 27 Page - ATMEL Corporation |
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AT89C51CC02CA-RATUM 数据表(HTML) 27 Page - ATMEL Corporation |
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27 / 156 page  27 AT/T89C51CC02 4126J–CAN–05/06 Figure 10. Lower 128 Bytes Internal RAM Organization Upper 128 Bytes RAM The upper 128 Bytes of RAM are accessible from address 80h to FFh using only indirect addressing mode. Expanded RAM The on-chip 256 Bytes of expanded RAM (XRAM) are accessible from address 0000h to 00FFh using indirect addressing mode through MOVX instructions. In this address range. Note: Lower 128 Bytes RAM, Upper 128 Bytes RAM, and expanded RAM are made of volatile memory cells. This means that the RAM content is indeterminate after power-up and must then be initialized properly. bit-Addressable Space 4 Banks of 8 Registers R0-R7 30h 7Fh (bit Addresses 0-7Fh) 20h 2Fh 18h 1Fh 10h 17h 08h 0Fh 00h 07h |
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