ST7626 datasheet(39/94 Pages) SITRONIX

39 / 94 page

ST7626

Ver 1.5

39/94

2007/01/20

7.10.5 EEPROM Setting Flow

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EEPROM Setting Flow

ST7626 provide the Write and Read function to write the Electronic Control value and Built-in resistance ratio into and read

them from the built-in EEPROM. Using the Write and Read functions, you can store these values appropriate to each LCD

panel. This function is very convenient for user in setting from some different panel’s voltage.

Figure 7.10.5 EC value control for different modules by loading EEPROM offset

Note1: This setting flow is used for LCM assembler.

Note2: EEPROM shouldn’t be written without preceding loading correctly from EEPROM to avoid some

errors during IC operation.

Note3: When writing value to EEPROM, the voltage of VLCDin must be more than 18V.

Note4: When writing value to EEPROM, the voltage of VDD2~VDD5 must be 2.8~3.3V.

Note5: When writing value to EEPROM, the Regulator and Follower must turn OFF, and Display also

must turn OFF.

Note6: If the EEPROM is exposed to a high temperature for hours, data in the memory cell may

probably be lost before the data retention guarantee period. To retain data in the memory cell,

keep the mamory cell below 90

℃. The data retention guarantee period is specified including

the retention period.

ST7626 Datasheet(PDF) 39 Page - Sitronix Technology Co., Ltd.