ZMOD4510 Datasheet

© 2021 Renesas Electronics Corporation

13

June 30, 2021

7. Test and Calibration

As a unique feature, all sampled gas sensor modules are fully tested during Renesas’ final test. The final test parameters in Table 8 are applied

for each ZMOD4510. All sensor modules are pre-stabilized in the final test although the user might see a small change in the module’s raw

signal during an initial warm-up phase during the first operation. The gas sensor module qualification is based on JEDEC (JESD47) and its

subsequent standard (JESD22, JESD78 etc.); it has been tested for a lifetime of 5 years. Renesas has proven a MOx lifetime of over 15+ years

in actual continuous operation in conditions without exposures to stressful environments.

Table 8.

Final Test Parameters

Test

Test Object

Parameters

Test Results

Saved in NVM?

Electrical

ASIC

Voltages, current consumption, frequencies, scan pattern

No

Electrical

Module

Calibration conditions, tracking ID, resistances

Yes

Gas

Module

Sensitivity parameters (slope and intercept) at stimulation with different gas concentrations

Yes

Gas

Module

Pre-stabilization

No

8. I2C Interface and Data Transmission Protocol

The I2C slave device interface supports various bus speeds: Standard Mode (≤100kHz) and Fast Mode (≤400kHz).

one used for conventional EEPROM devices. The register to read/write is selected by a register address pointer. This address pointer must be

set during an I2C write operation. For read access a repeated START condition but no STOP condition should be sent. After transmission of a

register, the address pointer is automatically incremented. A STOP condition ends the whole transmission. An increment from the address

For an example of the I2C data transmission protocol, see Figure 4. For information on I2C bus timing, see Figure 5. For I2C bus characteristics,

see Table 9, which explains how to set up the interface. All other values are according to the I2C standard. Although the ZMOD4510 has an

I2C interface, the user is not intended to modify any registers because a configuration change will affect the sensor module’s performance,

reliability, and accuracy. The API provided with the downloadable firmware package on the website manages all necessary sensor module

communication.

To validate the general MCU-specific I2C read/write driver without the use of Renesas firmware, it is possible to write random values to registers

0x88 to 0x8B and read them afterwards. After this register testing, erase the testing code and reset the device by disconnecting the power

support; otherwise the device may not operate properly.