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CC1110-RTR1 데이터시트(PDF) 35 Page - Texas Instruments |
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CC1110-RTR1 데이터시트(HTML) 35 Page - Texas Instruments |
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35 / 203 page ![]() CC1110 CC1110 PRELIMINARY Datasheet (Rev. 1.01) SWRS033A Page 35 of 202 The data pointer select bit, bit 0 in the Data Pointer Select register DPS, chooses which data pointer shall be the active one during execution of an instruction that uses the data pointer, e.g. in one of the above instructions. The data pointers are two bytes wide consisting of the following SFRs: • DPTR0 – DPH0:DPL0 • DPTR1 – DPH1:DPL1 DPH0 (0x83) – Data Pointer 0 High Byte Bit Name Reset R/W Description 7:0 DPH0[7:0] 0 R/W Data pointer 0, high byte DPL0 (0x82) – Data Pointer 0 Low Byte Bit Name Reset R/W Description 7:0 DPL0[7:0] 0 R/W Data pointer 0, low byte DPH1 (0x85) – Data Pointer 1 High Byte Bit Name Reset R/W Description 7:0 DPH1[7:0] 0 R/W Data pointer 1, high byte DPL1 (0x84) – Data Pointer 1 Low Byte Bit Name Reset R/W Description 7:0 DPL1[7:0] 0 R/W Data pointer 1, low byte DPS (0x92) – Data Pointer Select Bit Name Reset R/W Description 7:1 - 0x00 R0 Not used 0 DPS 0 R/W Data pointer select. Selects active data pointer. 0 DPTR0 1 DPTR1 12.3.4 XDATA Memory Access The CC1110 provides an additional SFR register MPAGE. This register is used during instructions MOVX A,@Ri and MOVX @Ri,A MPAGE gives the 8 most significant address bits, while the register Ri gives the 8 least significant bits. In some 8051 implementations, this type of XDATA access is performed using P2 to give the most significant address bits. Existing software may therefore have to be adapted to make use of MPAGE instead of P2. MPAGE (0x93)– Memory Page Select Bit Name Reset R/W Description 7:0 MPAGE[7:0] 0x00 R/W Memory page, high-order bits of address in MOVX instruction |
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