SSD1852Z datasheet(35/55 Pages) ETC

35 / 55 page

SSD1852

Rev 1.0

01/2003

SOLOMON

9.34 OTP setting and programming

OTP (One Time Programming) is a method to adjust VL6. In order to eliminate the

variations of LCD module in term of contrast level, OTP can be used to achieve the best

contrast of every LCD modules.

OTP setting and programming should include two major steps of (1) Find the OTP offset and

(2) OTP programming as following,

Step 1. Find OTP offset

(1) Hardware Reset (sending an active low reset pulse to RES pin)

(2) Send original initialization routines

(3) Set and display any test patterns

(4) Adjust the contrast value (0x81, 0x00~0x3F) until there is the best visual contrast

(5) OTP setting steps = Contrast value of the best visual contrast - Contrast value of original

initialization

Example 1:

Contrast value of original initialization = 0x20

Contrast value of the best original initialization = 0x24

OTP offset value = 0x24 - 0x20 = +4

OTP setting command should be (0x82, 0x04)

Example 2:

Contrast value of original initialization = 0x20

Contrast value of the best original initialization = 0x1B

OTP setting = 0x1B - 0x20 = -5

OTP setting command should be (0x82, 0x0B)

SSD1852Z Datasheet(PDF) 35 Page - List of Unclassifed Manufacturers