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AT89C5131A-RDTUM 数据表(PDF) 21 Page - ATMEL Corporation |
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AT89C5131A-RDTUM 数据表(HTML) 21 Page - ATMEL Corporation |
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21 / 184 page ![]() 21 AT89C5130A/31A-M 4337C–USB–02/05 The Special Function Registers (SFRs) of the AT89C5131 fall into the following categories: Table 21. C51 Core SFRs Table 22. I/O Port SFRs Mnemonic Add Name 765 43210 ACC E0h Accumulator B F0h B Register PSW D0h Program Status Word SP 81h Stack Pointer LSB of SPX DPL 82h Data Pointer Low byte LSB of DPTR DPH 83h Data Pointer High byte MSB of DPTR Mnemonic Add Name 765 43210 P0 80h Port 0 P1 90h Port 1 P2 A0h Port 2 P3 B0h Port 3 P4 C0h Port 4 (2bits) |
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