Datasheet

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
=1OutputFAULT
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, I
2
C 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-f
S
SCLK is supported.
• PWM headphone output is not supported.
I
2
C Commands to enable 423-kHz Switching
All I
2
C write operations should be at 100 kHz when used in this higher switching mode.
No 400-kHz I
2
C 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