sta335bwqs STMicroelectronics, sta335bwqs Datasheet - Page 18

• Manufacturer Part Number: sta335bwqs
• Description: 2.1-channel High-efficiency Digital Audio System With Qsound Qhd?
• Manufacturer: STMicroelectronics

Electrical specifications
3.5
18/72
Power-on/off sequence
Figure 3.
Figure 4.
TR = minimum time between XTI master clock stable and Reset removal: 1 ms,
TC = minimum time between RESET removal and I
Clock stable means: fmax - fmin < 1 MHz
No specific VCC and VDD_DIG turn-on sequence is required.
No specific VCC and VDD_DIG turn-on sequence is required.
This sequence ensure a pop-free turn-off procedure
VCC
VDD_DIG
XTI
Soft Mute
Register addr 0x07
EAPD
Register addr 0x05
VCC
VCC
VCC
VCC
VCC
VDD_Dig
VDD_Dig
VDD_Dig
VDD_Dig
VDD_Dig
XTI
XTI
XTI
XTI
XTI
Reset
Reset
Reset
Reset
Reset
I
I
I
I
I
PWDN
PWDN
PWDN
PWDN
PWDN
VCC
VDD_DIG
XTI
RESET
I
PWDN
2
2
2
2
2
2
C
C
C
C
C
C
VCC
VCC
VDD_Dig
VDD_Dig
XTI
XTI
Soft Mute
Soft Mute
Reg. 0x07
Reg. 0x07
Data 0xFE
Data 0xFE
Soft EAPD
Soft EAPD
Reg. 0x05
Reg. 0x05
Bit 7 = 0
Bit 7 = 0
Power-on sequence
Power-off sequence
Don’t care
Don’t care
Don’t care
Don’t care
Don’t care
Don’t care
Don’t care
Don’t care
Don’t care
Don’t care
Don’t care
Don’t care
Don’t care
Don’t care
TR
TR
TR
TR
TR
FE
FE
2
C program, sequence start: 1 ms.
TC
TC
TC
TC
TC
CMD0
CMD0
CMD0
CMD0
CMD0
Don’t care
Don’t care
Don’t care
Don’t care
CMD1
CMD1
CMD1
CMD1
CMD1
Don’t care
Don’t care
Don’t care
Don’t care
STA335BWQS
CMD2
CMD2
CMD2
CMD2
CMD2