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TAS5731MPHPR 데이터시트(PDF) 39 Page - Texas Instruments |
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TAS5731MPHPR 데이터시트(HTML) 39 Page - Texas Instruments |
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39 / 81 page ![]() (1or0) 2 + ´ 1 (1or0) 2 +(1or0) 2 +.......(1or0) 2 +.......(1or0) 2 ´ ´ ´ ´ 0 –1 –4 –23 2 Bit 1 2 Bit 0 2 Bit –1 2 Bit –4 2 Bit –23 M0126-01 2 Bit –23 S_xx.xxxx_xxxx_xxxx_xxxx_xxxx_xxx 2 Bit –5 2 Bit –1 2 Bit 0 SignBit 2 Bit 1 M0125-01 A6 A0 ACK Acknowledge I CDevice Addressand Read/WriteBit 2 R/W A6 A0 R/W ACK A0 ACK D7 D0 ACK Start Condition Stop Condition Acknowledge Acknowledge Acknowledge LastDataByte ACK FirstDataByte RepeatStart Condition Not Acknowledge I CDevice Addressand Read/WriteBit 2 Subaddress OtherDataBytes A7 A6 A5 D7 D0 ACK Acknowledge D7 D0 T0036-04 TAS5731M www.ti.com SLOS838C – JULY 2013 – REVISED AUGUST 2015 Programming (continued) Figure 64. Multiple-Byte Read Transfer 9.5.2 26-Bit 3.23 Number Format All mixer gain coefficients are 26-bit coefficients using a 3.23 number format. Numbers formatted as 3.23 numbers means that there are 3 bits to the left of the binary point and 23 bits to the right of the binary point. This is shown in Figure 65. Figure 65. 3.23 Format The decimal value of a 3.23 format number can be found by following the weighting shown in Figure 65. If the most significant bit is logic 0, the number is a positive number, and the weighting shown yields the correct number. If the most significant bit is a logic 1, then the number is a negative number. In this case every bit must be inverted, a 1 added to the result, and then the weighting shown in Figure 66 applied to obtain the magnitude of the negative number. Figure 66. Conversion Weighting Factors — 3.23 Format To Floating Point Gain coefficients, entered via the I2C bus, must be entered as 32-bit binary numbers. The format of the 32-bit number (4-byte or 8-digit hexadecimal number) is shown in Figure 67. Copyright © 2013–2015, Texas Instruments Incorporated Submit Documentation Feedback 39 Product Folder Links: TAS5731M |
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