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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCM1602 датащи(PDF) 17 Page - Texas Instruments |
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PCM1602 датащи(HTML) 17 Page - Texas Instruments |
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17 / 29 page  PCM1602 17 SBAS163 REGISTER DEFINITIONS B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 Register 1 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 AT17 AT16 AT15 AT14 AT13 AT12 AT11 AT10 Register 2 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 AT27 AT26 AT25 AT24 AT23 AT22 AT21 AT20 Register 3 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 AT37 AT36 AT35 AT34 AT33 AT32 AT31 AT30 Register 4 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 AT47 AT46 AT45 AT44 AT43 AT42 AT41 AT40 Register 5 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 AT57 AT56 AT55 AT54 AT53 AT52 AT51 AT50 Register 6 R/W IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 AT67 AT66 AT65 AT64 AT63 AT62 AT61 AT60 R/W Read/Write Mode Select When R/W = 0, a write operation is performed. When R/W = 1, a read operation is performed. Default Value: 0 ATx[7:0] Digital Attenuation Level Setting where x = 1 through 6, corresponding to the DAC output VOUTx. These bits are Read/Write. Default Value: 1111 1111B Each DAC output, VOUT1 through VOUT6, has a digital attenuator associated with it. The attenuator may be set from 0dB to –63dB, in 0.5dB steps. Changes in attenuator levels are made by incrementing or decrementing, by one step (0.5dB), for every 8/fS time interval until the programmed attenuator setting is reached. Alternatively, the attenuator may be set to infinite attenuation (or mute). The attenuation level may be set using the formula below. Attenuation Level (dB) = 0.5 (ATx[7:0]DEC – 255) where: ATx[7:0]DEC = 0 through 255 for: ATx[7:0]DEC = 0 through 128, the attenuator is set to infinite attenuation. The following table shows attenuator levels for various settings. ATx[7:0] Decimal Value Attenuator Level Setting 1111 1111B 255 0dB, No Attenuation (default) 1111 1110B 254 –0.5dB 1111 1101B 253 –1.0dB •• • •• • •• • 1000 0010B 130 –62.5dB 1000 0001B 129 –63.0dB 1000 0000B 128 Mute •• • •• • •• • 0000 0000B 0 Mute |
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