SSD1850 datasheet(50/56 Pages) ETC

50 / 56 page

SSD1850/51 Series

Rev 1.2

01/2003

SOLOMON

OTP Example program

Find the OTP offset:

1. Hardware reset by sending an active low reset pulse to RES pin

2. COMMAND(0XAB)

\\Enable oscillator

COMMAND(0X2F)

\\ turn on the internal voltage booster, internal regulator and output

op-amp buffer; Select booster level

3. COMMAND(0X48)

\\ Set Duty ratio

COMMAND(0X40)

\\ 64Mux

COMMAND(0X55)

\\ Set Biasing ratio (1/9 BIAS)

4. COMMAND(0X81)

\\ Set target gain and contrast.

COMMAND(0X2D)

\\ contrast = 45

COMMAND(0X24)

\\ gain = 5.1

5. \\ Set target display contents

COMMAND(0XB0)

\\ set page address

COMMAND(0x00)

\\ set lower nibble column address

COMMAND(0X10)

\\ set higher nibble column address

DATA(…)

\\ write target content to GDDRAM

COMMAND(0XAF)

\\ Set Display On

6. OTP offset calculation… target OTP offset value is +3

OTP programming:

7. Hardware reset by sending an active low reset pulse to RES pin

8. COMMAND(0XAB)

\\ Enable Oscillator

9. Connect an external VCC (16V-18V)

10. COMMAND(0X82)

\\ Set OTP offset value to +3 (0011)

COMMAND(0XF3)

\\ 0001 X3X2X1X0 , where X3X2X1X0 is the OTP offset value

11. COMMAND(0X83)

\\ Send the OTP programming command

12. Wait at least 2 seconds for programming wait time

13. Hardware reset by sending an active low reset pulse to RES pin

Verify the result:

14. After OTP programming, procedure 2 to 5 are repeated for inspection of the contrast on the

panel

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