ZSSC3123AI2R datasheet(44/62 Pages) RENESAS

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ZSSC3123 Datasheet

Nov 19, 2021

Page 44

12. EEPROM

The EEPROM array contains the calibration coefficients for gain and offset, etc., and the configuration bits for the analog front-end, output

modes, measurement modes, etc. The ZSSC3123 EEPROM is arranged as 32 16-bit words (see Table 28). The EEPROM is divided into two

sections. Words 0HEX to 15HEX can only be written to if the EEPROM is unlocked. After the EEPROM is locked, these locations can no longer

be written to. The EEPROM lock bits are in the ZMDI_Config register (see Table 28 for the bit assignment). Words 16HEX to 1FHEX (highlighted

blue in Table 28) are always unlocked and available for writing to at all times. See section 11 for instructions on reading and writing to the

EEPROM in Command Mode via the I2C interface. When programming the EEPROM, an internal charge pump voltage is used; therefore a

high voltage supply is not needed.

Note: If the EEPROM was accidentally locked, it can be unlocked with the following instructions (see section 11 for how to send commands).

1. Enter Command Mode with a Start_CM command.

2. Send an A2HEX for the command byte and 0000HEX for the command data.

3. Send an F0HEX for the command byte and 0021HEX for the command data.

4. Clear the EEPROM_Lock bits in the ZMDI_Config register with an EEPROM Write command.

5. Reset the part.

There are four Customer_ID words available for customer use, two in the locked region and two in the unlocked region. They can be used as a

customer serial number for module traceability. (See the following table for Customer_ID EEPROM addresses.) The integrity of the contents of

the EEPROM array is ensured via ECC (see section 10.4.1).

The following table provides a summary of the EEPROM contents. The configuration register bits are explained in detail in the following

subsections.

Table 28. EEPROM Word Assignments

Note: See important notes at the end of the table.

EEPROM Word

Bit Range

IC Default

Name

Description and Notes

00HEX

15:0

XXXXHEX

Cust_ID0

Customer ID byte 0: For use by customer (default value is the

upper 16 bits of the lot number)

01HEX

15:0

XXXXHEX

(LLLLLLLLB

0000ssssB)

Cust_ID1

Customer ID byte 1: For use by customer (default value is the

lower 8 bits of the lot number and an 8 bit wafer number)

02HEX

15:0

0B00HEX

ZMDI_Config

Renesas configuration register (see section 12.1)

03HEX

15:0

0006HEX

Not Available

Do Not Change; must leave at factory settings

04HEX

15:0

00FTHEX

Not Available

Do Not Change; must leave at factory settings [a]

05HEX

15:0

0000HEX

Not Available

Do Not Change; must leave at factory settings

06HEX

15:0

0C06HEX

C_Config

AFE capacitance configuration register (see Table 30)

07HEX

15:0

0000HEX

SOT_tco

2nd order temperature offset correction for capacitance

08HEX

15:0

0000HEX

Tco

Temperature offset correction for capacitance

09HEX

15:0

0000HEX

SOT_tcg

2nd order temperature gain correction for capacitance

0AHEX

15:0

0000HEX

Tcg

Temperature gain correction for capacitance

0BHEX

15:0

0000HEX

Offset

Offset correction for capacitance

0CHEX

15:0

2000HEX

Gain_1

Gain correction for capacitance (region 1)

0DHEX

15:0

0000HEX

SOT_1

2nd order correction for capacitance (region 1)

0EHEX

15:0

2000HEX

Gain_2

Gain correction for capacitance (region 2)

0FHEX

15:0

0000HEX

SOT_2

Or TOT_1

2nd order correction for capacitance (region 2);

alternatively 3rd order correction (only one region)

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