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WM8960 Datasheet(PDF) 39 Page - Wolfson Microelectronics plc |
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WM8960 Datasheet(HTML) 39 Page - Wolfson Microelectronics plc |
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39 / 92 page  Production Data WM8960 w PD, August 2013, Rev 4.2 39 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R40 (28h) Left Speaker Volume 6:0 SPKLVOL [6:0] 0000000 (MUTE) SPK_LP/SPK_LN Volume 1111111 = +6dB … 1dB steps down to 0110000 = -73dB 0101111 to 0000000 = Analogue MUTE 7 SPKLZC 0 Left Speaker Zero Cross Enable 1 = Change gain on zero cross only 0 = Change gain immediately 8 SPKVU 0 Speaker Volume Update 0 = Store SPKLVOL in intermediate latch (no gain change) 1 = Update left and right channel gains (left = SPKLVOL, right = intermediate latch) R41 (29h) Right Speaker Volume 6:0 SPKRVOL [6:0] 0000000 (MUTE) SPK_RP/SPK_RN Volume 1111111 = +6dB … 1dB steps down to 0110000 = -73dB 0101111 to 0000000 = Analogue MUTE 7 SPKRZC 0 Right Speaker Zero Cross Enable 1 = Change gain on zero cross only 0 = Change gain immediately 8 SPKVU 0 Speaker Volume Update 0 = Store SPKRVOL in intermediate latch (no gain change) 1 = Update left and right channel gains (left = intermediate latch, right = SPKRVOL) R51 (33h) Class D Control (3) 5:3 DCGAIN [2:0] 000 (1.0x) DC Speaker Boost (Boosts speaker DC output level by up to 1.8 x on left and right channels) 000 = 1.00x boost (+0dB) 001 = 1.27x boost (+2.1dB) 010 = 1.40x boost (+2.9dB) 011 = 1.52x boost (+3.6dB) 100 = 1.67x boost (+4.5dB) 101 = 1.8x boost (+5.1dB) 110 to 111 = Reserved 2:0 ACGAIN [2:0] 000 (1.0x) AC Speaker Boost (Boosts speaker AC output signal by up to 1.8 x on left and right channels) 000 = 1.00x boost (+0dB) 001 = 1.27x boost (+2.1dB) 010 = 1.40x boost (+2.9dB) 011 = 1.52x boost (+3.6dB) 100 = 1.67x boost (+4.5dB) 101 = 1.8x boost (+5.1dB) 110 to 111 = Reserved Table 25 SPK_L/SPK_R Volume and Speaker Boost Control To prevent pop noise, DCGAIN and ACGAIN should not be modified while the speaker outputs are enabled. To avoid clipping at speaker ground, ACGAIN should not be greater than DCGAIN. |
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