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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TAS3103DBT датащи(PDF) 75 Page - Texas Instruments |
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TAS3103DBT датащи(HTML) 75 Page - Texas Instruments |
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75 / 146 page  3−15 Table 3−3. Treble Shelf Filter Indices for 1/2-dB Adjustments ADJUSTMENT (DB) INDEX(1) ADJUSTMENT (DB) INDEX(1) ADJUSTMENT (DB) INDEX(1) 18 0x01 5.5 0x63 −7 0x80 17.5 0x09 5 0x65 −7.5 0x81 17 0x10 4.5 0x66 −8 0x82 16.5 0x16 40 0x68 −8.5 0x83 16 0x1C 3.5 0x69 −9 0x84 15.5 0x22 3 0x6B −9.5 0x85 15 0x28 2.5 0x6C −10 0x86 14.5 0x2D 2 0x6D −10.5 0x87 14 0x31 1.5 0x6F −11 0x88 13.5 0x35 1 0x70 −11.5 0x89 13 0x3A 0.5 0x71 −12 0x8A 12.5 0x3E 0 0x72 −12.5 0x8B 12 0x42 −0.5 0x73 −13 0x8C 11.5 0x45 −1 0x74 −13.5 0x8D 11 0x49 −1.5 0x75 −14 0x8E 10.5 0x4C −2 0x76 −14.5 0x8F 10 0x4F −2.5 0x77 −15 0x90 9.5 0x52 −3 0x78 −15.5 0x91 9 0x55 −3.5 0x79 −16 0x92 8.5 0x57 −4 0x7A −16.5 0x93 8 0x5A −4.5 0x7B −17 0x94 7.5 0x5C −5 0x7C −17.5 0x95 7 0x5E −5.5 0x7D −18 0x96 6.5 0x60 −6 0x7E 6 0x62 −6.5 0x7F (1) CH1 Index is Subaddress 0xF8, Bit Field 7:0. CH2 Index is Subaddress 0xF8, Bit Field 15:8. CH3 Index is Subaddress 0xF8, Bit Field 23:16. 3.5.1 Treble and Bass Processing and Concurrent I2C Read Transactions I2C read transactions at subaddresses 0x01 through 0xD1 are not allowed during: (1) transitions between filter shelves within a given bass or treble filter set or (2) transitions between filter sets. This means that after issuing an I2C command to change treble or bass filter shelves or filter sets, time must be allowed to complete the bass/treble activity before proceeding to read subaddresses 0x01 through 0xD1. There is no subaddress available to directly monitor bass/treble activity. However, there is a means of probing the state of bass/treble activity via the factory test subaddresses 0xEC and 0xED. If it is required to read subaddress data that falls in the subaddress range of 0x01 through 0xD1 after issuing an I2C command to change treble or bass filter shelves or filter sets, the procedure presented in Figure 3−14 can be used to monitor bass/treble activity. As Figure 3−14 shows, six readings must be taken to verify that none of the three monaural channels have on-going bass or treble activity. If all six readings show the value zero in the 8th or least significant byte of the 8-byte data word output at subaddress 0xED, then all commanded bass/treble activity has completed and it is safe to resume I2C read transactions at subaddresses 0x01 through 0xD1. |
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