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TS87C51U2 数据表(PDF) 11 Page - ATMEL Corporation |
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TS87C51U2 数据表(HTML) 11 Page - ATMEL Corporation |
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11 / 67 page  Rev. D - 15 January, 2001 11 TS80C51U2 TS83C51U2 TS87C51U2 7.2 Dual Data Pointer Register Ddptr The additional data pointer can be used to speed up code execution and reduce code size in a number of ways. The dual DPTR structure is a way by which the chip will specify the address of an external data memory location. There are two 16-bit DPTR registers that address the external memory, and a single bit called DPS = AUXR1/bit0 (See Table 5.) that allows the program code to switch between them (Refer to Figure 3). Figure 3. Use of Dual Pointer External Data Memory AUXR1(A2H) DPS DPH(83H) DPL(82H) 0 7 DPTR0 DPTR1 |
类似零件编号 - TS87C51U2 |
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类似说明 - TS87C51U2 |
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