AS3415 datasheet(51/102 Pages) AMSCO

51 / 102 page

ams Datasheet, Confidential: 2014-Jun-13 [v1-30]

AS3415/AS3435 – 51

Detaile d Desc rip t ion

Independent of the OTP programming, it is possible to

overwrite the OTP register temporarily if the chip is controlled

by a microcontroller via I²C. The chip configuration can be

stored in the flash memory of the Bluetooth- or wireless chipset

and can be loaded to the ANC chipset during startup of the

device via the I²C interface. Because the OTP fuses upload their

contents into the OTP register at power-up, the new OTP

settings from the microcontroller will overwrite the default

settings from the fuses. All I²C OTP registers settings can be

changed as many times as desired, but will be lost at power off.

The OTP memory can be accessed in the following ways:

• LOAD Operation: The LOAD operation reads the OTP

fuses and loads the contents into the OTP register. A LOAD

operation is automatically executed after each

power-on-reset.

• WRITE Operation: The WRITE operation allows a

temporary modification of the OTP register. It does not

program the OTP. This operation can be invoked multiple

times and will remain set while the chip is supplied with

power and while the OTP register is not modified with

another WRITE or LOAD operation.

• READ Operation: The READ operation reads the contents

of the OTP register, for example to verify a WRITE

command or to read the OTP memory after a LOAD

command.

• STORE Operation: The STORE operation programs the

contents of the OTP register permanently into the OTP

fuses. Don’t use old or nearly empty batteries for

programming the fuses.

OTP Registers & Fuses:

The OTP registers are volatile memory

cells which lose the content once the

device is switched off. Multiple read and

write commands are possible but in order

to store chip settings during power off

mode, the OTP fuses have to be used.

AS3415 датащи(PDF) 51 Page - ams AG