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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DAC1282IPW датащи(PDF) 32 Page - Texas Instruments |
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DAC1282IPW датащи(HTML) 32 Page - Texas Instruments |
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32 / 43 page  DAC1282 SBAS490 – DECEMBER 2011 www.ti.com REGISTER MAP DAC1282 operation is controlled through a set of 8-bit registers. Collectively, the registers contain all the information needed to configure the DAC, such as output frequency and amplitude, output pulse levels, etc. Table 15 shows the register map. The default state of the device at power-up, after the RESET pin is taken high or after a RESET command is as follows: Sine mode, frequency = 31.25 Hz, –36-dB output range, 0-dB digital attenuation Switch state: open Table 15. Register Map ADDRESS REGISTER DEFAULT BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 0 GANMOD xxx11000 ID2 ID1 ID0 GAIN2 GAIN1 GAIN0 MODE1 MODE0 1 SING 00000000 SINEG7 SINEG6 SINEG5 SINEG4 SINEG3 SINEG2 SINEG1 SINEG0 2 SWM 00000000 FREQ SW2 SW1 SW0 M3 M2 M1 M0 3 N 00000111 N7 N6 N5 N4 N3 N2 N1 N0 4 DCG0 00000000 DCG7 DCG6 DCG5 DCG4 DCG3 DCG2 DCG1 DCG0 5 DCG1 00000000 DCG15 DCG14 DCG13 DCG12 DCG11 DCG10 DCG9 DCG8 6 DCG2 00000000 DCG23 DCG22 DCG21 DCG20 DCG19 DCG18 DCG17 DCG16 7 PULSA 00000000 0 0 0 PULSA4 PULSA3 PULSA2 PULSA1 PULSA0 8 PULSB 00000000 0 0 0 PULSB4 PULSB3 PULSB2 PULSB1 PULSB0 Table 16. GANMOD: Range and Mode Register 0 (Address = 0h) 7 6 5 4 3 2 1 0 ID2 ID1 ID0 GAIN2 GAIN1 GAIN0 MODE1 MODE0 Bits[7:5] ID[2:0]: Factory-programmed identification bits (read-only) These bits may change at any time without notification. Bits[4:2] GAIN[2:0]: Analog gain (output range) These bits set the analog gain in the sine, dc, and bitstream modes. The output amplitude is the combination of the selected range and the digital gain. Sine mode digital gain is programmed by the SINEG register; dc mode digital gain are the DCG0, DCG1, and DCG2 registers. Pulse mode levels are exclusively controlled by the PULSA and PULSB registers. GAIN[2:0] OUTPUT (dB) OUTPUT RANGE (V)(1) 000 0 ±2.5 001 –6 ±1.25 010 –12 ±0.625 011 –18 ±0.312 100 –24 ±0.156 101 –30 ±0.078 110 (default) –36 ±0.039 Bits[1:0] MODE[1:0]: Mode control bits The mode bits set the mode of operation. When the mode bits are changed, the internal signal generator block is reset. 00 = Sine mode (default) 01 = DC mode 10 = Digital data mode 11 = Pulse mode (1) (Peak-to-peak) full-scale output range, VREF = 5 V. Digital gain = 0 dB. 32 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): DAC1282 |
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