AS3415 Datasheet, PDF (52/102 Pages) ams AG – Integrated Active Noise Cancelling Solution with Bypass Feature

Figure 66:
OTP Read Access Flow Chart
Detailed Description
OTP Read/Write and Load Access
With the OTP register architecture of the AS3415/35 it is
important to know how to access the registers for reading and
writing. Before an I²C read command can be sent there are two
registers that have to be configured prior to the desired I²C read
command. The flow chart in Figure 66 show the correct read
access sequence. The first step is to configure the
EVAL_REG_ON register. This register enables access to the
OTP_MODE register. The OTP_MODE register defines whether
you want to read or write to the OTP registers. By setting the
OTP_MODE register ‘00’ we select OTP read access. Once the
OTP_MODE register has been configured you can start reading
from the OTP registers.
Set bit EVAL_REG_ON in
register 0x20
Set OTP_MODE
register to ‘00‘b
Read from desired
OTP register
OTP Read Access Flow Chart: This flow chart shows how to successfully read from an OTP register via the I²C or
production trimming interface.
AS3415/AS3435 – 52
ams Datasheet, Confidential: 2014-Jun-13 [v1-30]