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AS3421 Datasheet(PDF) 24 Page - ams AG

Part # AS3421
Description  Low Power Ambient Noise-Cancel l ing Speaker Dr iver
PDF  61 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3421 Datasheet(HTML) 24 Page - ams AG

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www.austriamicrosystems.com
Revision 0.90
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AS3421 AS3422
Datasheet - D e t a i l e d D e s c r i p t i o n
Figure 28. OTP Burning Process
9.8 2-Wire-Serial Control Interface
There is an I2C slave block implemented to have access to 64 byte of setting information.
The I2C address is: Adr_Group8 - audio processors
8Eh_write
8Fh_read
9.8.1
Protocol
Table 13. 2-Wire Serial Symbol Definition
Symbol
Definition
RW
Note
S
Start condition after stop
R
1 bit
Sr
Repeated start
R
1 bit
DW
Device address for write
R
1000 1110b (8Eh)
DR
Device address for read
R
1000 1111b (8Fh)
WA
Word address
R
8 bit
A
Acknowledge
W
1 bit
N
No Acknowledge
R
1 bit
reg_data
Register data/write
R
8 bit
data (n)
Register data/read
W
8 bit
enter
“Application Trimm”
mode
ANC pre burning
measurements
MAIN_LOCK
set?
write, burn OTP fuses
30-35h, 16-17h
Set MAIN_LOCK and
SEQ_LOCK
N
Y
Y
N
verification
OK?
leave
“Application Trimm”
mode
Device trimming
failed
leave
“Application Trim”
mode
ANC post burning
measurements
Device trimming
succeeded
Y
N
verification
OK?
trimm verification
ALT1_LOCK
set?
MIC trimm #2
write, burn OTP fuses
10-11h
Set ALT1_LOCK
N
Y
ALT2_LOCK
set?
MIC trimm #3
write, burn OTP fuses
12-13h
Set ALT2_LOCK
N
Y
ALT3_LOCK
set?
MIC trimm #4
write, burn OTP fuses
14-15h
Set ALT3_LOCK
N
Y
No further MIC
trimming possible
leave
“Application Trimm”
mode



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