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W77L032A25PL Datasheet(PDF) 11 Page - Winbond |
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W77L032A25PL Datasheet(HTML) 11 Page - Winbond |
11 / 76 page W77L32/W77L032A/W77M032A Publication Release Date: February 1, 2007 - 11 - Revision A5 Stack Pointer Bit: 7 6 5 4 3 2 1 0 SP.7 SP.6 SP.5 SP.4 SP.3 SP.2 SP.1 SP.0 Mnemonic: SP Address: 81h The Stack Pointer stores the Scratchpad RAM address where the stack begins. In other words, it always points to the top of the stack. Data Pointer Low Bit: 7 6 5 4 3 2 1 0 DPL.7 DPL.6 DPL.5 DPL.4 DPL.3 DPL.2 DPL.1 DPL.0 Mnemonic: DPL Address: 82h This is the low byte of the standard 8052 16-bit data pointer. Data Pointer High Bit: 7 6 5 4 3 2 1 0 DPH. 7 DPH. 6 DPH. 5 DPH. 4 DPH. 3 DPH. 2 DPH. 1 DPH. 0 Mnemonic: DPH Address: 83h This is the high byte of the standard 8052 16-bit data pointer. Data Pointer Low1 Bit: 7 6 5 4 3 2 1 0 DPL1.7 DPL1.6 DPL1.5 DPL1.4 DPL1.3 DPL1.2 DPL1.1 DPL1.0 Mnemonic: DPL1 Address: 84h This is the low byte of the new additional 16-bit data pointer that has been added to the W77L032. The user can switch between DPL, DPH and DPL1, DPH1 simply by setting register DPS = 1. The instructions that use DPTR will now access DPL1 and DPH1 in place of DPL and DPH. If they are not required they can be used as conventional register locations by the user. Data Pointer High1 Bit: 7 6 5 4 3 2 1 0 DPH1.7 DPH1.6 DPH1.5 DPH1.4 DPH1.3 DPH1.2 DPH1.1 DPH1.0 Mnemonic: DPH1 Address: 85h This is the high byte of the new additional 16-bit data pointer that has been added to the W77L032. The user can switch between DPL, DPH and DPL1, DPH1 simply by setting register DPS = 1. The |
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