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AS3418

Functional Description

Datasheet

• PUBLIC

DS000507

• v4-00 • 2020-Jan-23

│ 41

Figure 54:

EEPROM Upload Flow Chart

6.10.3

EEPROM Upload Test Function

Before an EEPROM Upload function is started it is recommended to do first an Upload Test. During

this test the device does not write the EEPROM settings, instead it just tries if it would be possible to

write the EEPROM successfully. It is checked if the power supply is sufficient to trigger a real

EEPROM Upload.

Figure 55:

EEPROM Upload Test Function

The sequence for the Upload test function is similar to the real Upload. The only difference is that the

EEPROM_UPLOAD_TEST bit has to be set to start the upload test instead of the

EEPROM_UPLOAD bit. The flow chart for the Upload test sequence is shown in Figure 55.

6.11

Production Trimming Interface

In addition to option programming the AS3418 via I2C interface, the AS3418 features a second unique

trimming mechanism. This very special mode enables the analog music inputs of the AS3418 to

become a digital production trimming input.

Set bit EEPROM_UPLOAD

in register 0x34

EEPROM Upload

complete

Check

EE_READY bit

in register 0x01

EE_READY = 0

EE_READY = 1

Check

EE_WR_OK bit

in register 0x01

EE_WR_OK = 1

EEPROM Upload

failed

EE_WR_OK = 0

Set bit

EEPROM_UPLOAD_TEST

in register 0x34

EEPROM Upload Test

complete

Check

EE_READY bit

in register 0x01

EE_READY = 0

EE_READY = 1

Check

EE_WR_OK bit

in register 0x01

EE_WR_OK = 1

EEPROM Upload Test

failed

EE_WR_OK = 0

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