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AD5175BCPZ-10-R2 数据表(PDF) 17 Page - Analog Devices |
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AD5175BCPZ-10-R2 数据表(HTML) 17 Page - Analog Devices |
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17 / 20 page  AD5175 Rev. 0 | Page 17 of 20 Table 8. Write and Read to RDAC and 50-TP Memory DIN SDO1 Action 0x1C03 0xXXXX Enable update of wiper position and 50-TP memory contents through digital interface. 0x0500 0x1C03 Write 0x100 to the RDAC register, wiper moves to ¼ full-scale position. 0x0800 0x0500 Prepare data read from RDAC register. 0x0C00 0x100 Stores RDAC register content into 50-TP memory. 16-bit word appears out of SDO, where the last 10-bits contain the contents of the RDAC Register 0x100. 0x1800 0x0C00 Prepare data read of the last programmed 50-TP memory monitor location. 0x0000 0xXX19 NOP Instruction 0 sends a 16-bit word out of SDO, where the six LSBs (that is, the last 6 bits) contain the binary address of the last programmed 50-TP memory location, for example, 0x19 (see Table 11). 0x1419 0x0000 Prepares data read from Memory Location 0x19. 0x2000 0x0100 Prepare data read from the control register. Sends a 16-bit word out of SDO, where the last 10-bits contain the contents of Memory Location 0x19. 0x0000 0xXXXX NOP Instruction 0 sends a 16-bit word out of SDO, where the last four bits contain the contents of the control register. If Bit C2 = 1, fuse program command successful. 1 X is don’t care. Table 9. Control Register Bit Map DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 0 0 0 0 C2 0 C1 C0 Table 10. Control Register Description Bit Name Description C0 50-TP program enable 0 = 50-TP program disabled (default) 1 = enable device for 50-TP program C1 RDAC register write protect 0 = wiper position frozen to value in OTP memory (default)1 1 = allow update of wiper position through a digital interface C2 50-TP memory program success bit 0 = fuse program command unsuccessful (default) 1 = fuse program command successful 1 Wiper position is frozen to the last value programmed in the 50-TP memory. Wiper freezes to midscale if 50-TP memory has not been previously programmed. Table 11. Memory Map Command Number Data Byte[DB9:DB0]1 Register Contents D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 5 X X X 0 0 0 0 0 0 0 Reserved X X X 0 0 0 0 0 0 1 1st programmed wiper location (0x01) X X X 0 0 0 0 0 1 0 2nd programmed wiper location (0x02) X X X 0 0 0 0 0 1 1 3rd programmed wiper location (0x03) X X X 0 0 0 0 1 0 0 4th programmed wiper location (0x04) … … … … … … … … … … … X X X 0 0 0 1 0 1 0 10th programmed wiper location (0xA) … … … … … … … … … … … X X X 0 0 1 0 1 0 0 20th programmed wiper location (0x14) … … … … … … … … … … … X X X 0 0 1 1 1 1 0 30th programmed wiper location (0x1E) … … … … … … … … … … … X X X 0 1 0 1 0 0 0 40th programmed wiper location (0x28) … … … … … … … … … … … X X X 0 1 1 0 0 1 0 50th programmed wiper location (0x32) … … … … … … … … … … … X X X 0 1 1 1 0 0 1 MSB resistance tolerance (0x39) X X X 0 1 1 1 0 1 0 LSB resistance tolerance (0x3A) 1 X is don’t care. |
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