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APPENDIX A _______________________________________ READING COEFFICIENTS FROM THE EEPROM

VAISALA _________________________________________________________________________ 13

APPENDIX A

READING COEFFICIENTS FROM THE

EEPROM

The PMB100 module has a Xicor's EEPROM memory, type X24C02,

which uses the I

C interface. All the pressure and temperature related

coefficients are stored in the memory in form of 32 bit, and can be

read by a microprocessor (see Table 1). The pin assignments are as

shown in Figure 2 on page 7. Detailed instructions of the EEPROM are

found on Xicor's web pages (http://www.xicor.com/).

NOTE

EEPROM can not be read if the shut down is active (ON).

Table 1 EEPROM memory map

Name Symbol Type Length Memory

address

Range

[Bit] [Byte]

Product code

PCode

8-bit int 8 0 [0...256]

Serial number

Sno

32 1 - 4

Calibration date

Date

24 5 - 7

Scaling factor

8-bit int 8 8 [0...256]

Normalized room

temperature

32-bit int 32 10 - 13 [-1...1]

Normalized coefficients

32-bit int 32 14 - 17 [-1...1]

32-bit int 32 18 21 [-1...1]

32-bit int 32 22 25 [-1...1]

32-bit int 32 26 29 [-1...1]

32-bit int 32 30 33 [-1...1]

32-bit int 32 34 37 [-1...1]

32-bit int 32 38 41 [-1...1]

32-bit int 32 42 45 [-1...1]

32-bit int 32 46 49 [-1...1]

32-bit int 32 50 53 [-1...1]

1 2 ... 8 9 10 11 12 13 14

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