DocID024452 Rev 1

11/24

SEA01

Online digital trimming procedure

3.3

Device commands

The commands are implemented with a one-byte word including a bit for parity check (LSB).

C8 = parity check bit.

The parity check has the following structure.

C8 = C1

⊕ C2 ⊕ C3 ⊕ C4 ⊕ C5 ⊕ C6 ⊕ C7.

The possible commands are summarized in Table 5. If the device receives a command not

specified in Table 5 or in case of failure of parity check, no command is executed and a fail

flag is internally activated.

C8 = parity check bit data.

The data are implemented with a one-byte word including a bit for parity check (LSB).

D8 = parity check bit.

The parity check has the following structure.

D8 = D1

⊕ D2 ⊕ D3 ⊕ D4 ⊕ D5 ⊕ D6 ⊕ D7.

(depending on the command) will be not updated. An internal parity fail flag is activated and

it is not possible to execute any command before a read command.

3.4

Emulation commands

MSB

LSB

C1

C2

C3

C4

C5

C6

C7

C8

Table 5. Command mapping

Command code

C1

C2

C3

C4

C5

C6

C7

C8

10

01000

0

10

00011

1

Write NVM

0

1

0

1010

1

Reload NVM

0

0

1

0

0

0

0

1

MSB

LSB

D1

D2

D3

D4

D5

D6

D7

D8