AS1163 datasheet(83/91 Pages) AMSOSRAM

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AS1163

Command and register description

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DS001075 • v2-00 • 2025-Nov-21

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7.13.19

SETI2CCFG (0x57)

Write the I²C configuration/status register with 8-bit payload. No answer.

Payload: I²C configuration/status register.

Broadcast is not allowed.

Answer: No answer.

7.13.20

READOTP (0x58)

Read data stored in OTP. Payload is 8-bit, address in OTP (mirror) where to start reading.

Addresses beyond the OTP size (beyond 0x1F) are read as 0x00 (so no wrap-around).

Answer is 8 bytes read from start byte. The telegram payload has the bytes in big endian. For

example READOTP(10) has a response with the read bytes (10..17) in the order 17, 16, .., 10.

OTP access takes time; wait 60us after sending this telegram.

See OTP customer area table (Table 6).

7.13.21

SETOTP (0x59)

Writes 7 bytes to the OTP. It is advised to do read-modify-write on a 7 byte buffer. Addresses

beyond the OTP size (beyond 0x1F) are ignored for write (so no wrap-around). The target

address is at the end of the telegram, and the 7 data bytes are in reverse order.

The following telegram writes “data 0” to “OTP adder” and “data 1” to OTP addr + 1” and so on

up to “data 6” being written to “OTP addr + 6”.

Figure 31: SETOTP

The write is not to the OTP, but to the OTP mirror in device RAM. The mirror is initialized with

the OTP content on power on reset. The mirror is not re-initialized by a RESET telegram.

SETOTP only works when the correct password is first sent using TESTPW. Without the

TESTPW set, the SETOTP does not update the OTP mirror. The TESTPW must be unset (e.g.

set to 0) for normal operation, because when the test password is set, telegram forwarding is

impacted.

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