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TAS5715 Datasheet(PDF) 45 Page - Texas Instruments |
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TAS5715 Datasheet(HTML) 45 Page - Texas Instruments |
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45 / 74 page ![]() HP/ (SE/ ) SPKR BTL VALID PWM_A(L+) PWM_C(R+) PWM_B(L–) PWM_D(R–) I C:SCL SDA 2 HPSD FAULT (A0/ ) PDN t (mute) Enter ACSD Enable FAULT Disable FAULT Unmute HP Config Mute Exit ACSD HPL/R HPL/R t (exitSDHPamp) t (enterSDHPamp) t (exitSDHP) T0454-01 =1Output FAULT Hi-Z(Ext.Pulldown) TAS5715 www.ti.com SLOS645 – AUGUST 2010 Headphone-Mode All-Channel Shutdown PARAMETE DESCRIPTION MIN TYP MAX UNIT R 5 + 1.3 × t(mute) Mute volume ramp wait time (t(volramp) given by register 0x0E <2:0>) ms t(volramp) Exit shutdown wait time before enabling external headphone amp (t(HPchg) t(exitSDHP) 1 + 1.3 × t(HPchg) ms given by register 0x1A<6:5>) Headphone amp exit shutdown wait time before unmuting (t(HPamp) given by 1 + 1.3 × t(exitSDHPamp) ms register 0x1C<7:4>) t(HPamp) Headphone amp enter shutdown wait time before entering ACSD (t(HPamp) 1 + 1.3 × t(enterSDHPamp) ms given by register 0x1C<7:4>) t(HPamp) Figure 59. Headphone Control ACSD Applying Soft Reset To soft-reset the device, write 0x01 to register 0xC8. Once soft reset is applied, I2C commands should not be sent for a duration of 2 × (1 ms + 1.3 × t(start/stop)) + 13.5 ms. Restrictions in Using 432-kHz Output Switching • Only 48-kHz LRCLK is supported. The maximum allowed variance on LRCLK is 1%. • The maxmimum allowed MCLK frequency is 12.288 MHz + 1%. • Only 64-fS SCLK is supported. • PWM headphone output is not supported. I 2C Commands to enable 423-kHz Switching All I2C write operations should be at 100 kHz when used in this higher switching mode. No 400-kHz I2C is supported when used in this mode. To switch into 432-kHz switching mode, send the following commands before sending the exit shutdown command to register 0x05. • Write to register 0xF8 with a value of 0xA5A5A5A5. Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback 45 Product Folder Link(s): TAS5715 |
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