DocID024452 Rev 1

9/24

SEA01

Online digital trimming procedure

3

Online digital trimming procedure

3.1

General features

The embedded digital trimming allows the user to adjust and permanently store using

product, compensating the tolerance of the external components and the error due to their

discretized values.

The device provides a non-volatile memory (NVM) based on a redundant OTP (two OTP,

one-time-programmable memories) and a volatile memory.

Once the optimal values have been found, the user can permanently store them in the OTP

memory.

The presence of a second OTP allows the user to perform a second trimming of the device.

permanently store these values in the second OTP.

–

if the IC non-volatile memory has never been burned (i.e. no value has ever been

values (see Table 6 and Table 7)

–

if the IC non-volatile memory has been burned a first time (i.e. values stored in the

the first trimming process

–

if the IC non-volatile memory has been burned a second time (i.e.values stored in

during the second trimming process

to an additional parity check control.

Two wires, serial data and serial clock, carry information between the devices connected to

master (a microcontroller, industrial PC, ATE, etc.) that initiates a data transfer on the bus

and generates the clock signal to permit that transfer. Generation of clock signals on the

transmitter (transmitter-slave) depending on the command received from the master. The

serial data and serial clock are bidirectional lines connected to a positive supply voltage

through a pull-up resistor: SEA01 has an internal pull-up on the DATA and CLOCK pins in

order to pull HIGH the pins when they are floating, but the user has to implement an

adequate pull-up of the lines using external pull-up resistors. When the bus is free, both

lines are HIGH. The data on the serial data line must be stable during the HIGH period of

the clock. The HIGH or LOW state of the data line can only change when the clock signal on

the serial clock line is LOW.

and STOP (P) conditions. A HIGH-to-LOW transition on the serial data line while the serial

clock is HIGH is one such unique case. This situation indicates a START condition. A LOW-

to-HIGH transition on the serial data line while the serial clock line is HIGH defines a STOP