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SSD1850 Arkusz danych(PDF) 48 Page - List of Unclassifed Manufacturers

Numer części SSD1850
Szczegółowy opis  CMOS LCD Segment / Common Driver with Controller
PDF  56 Pages
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Producent  ETC [List of Unclassifed Manufacturers]
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SSD1850 Arkusz danych(HTML) 48 Page - List of Unclassifed Manufacturers

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SSD1850/51 Series
Rev 1.2
01/2003
SOLOMON
44
OTP Programming Circuit and Sequence
OTP (One Time Programming) is a method to adjust the 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 the 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 visual contrast = 0x24
OTP setting steps = 0x24 - 0x20 = +4
OTP setting commands should be (0x82, 0xF4)
Example 2:
Contrast value of original initialization = 0x20
Contrast value of the best visual contrast = 0x1B
OTP setting steps = 0x1B - 0x20 = -5
OTP setting commands should be (0x82, 0xFB)
Step 2. OTP programming
(6) Hardware Reset (sending an active low reset pulse to RES pin)
(7) Enable Oscillator (0xAB)
(8) Connect an external VCC (see diagram below)
(9) Send OTP setting commands that we find in step 1 (0x82, 0xF0~0xFF)
(10)Send OTP programming command (0x83)
(11)Wait at least 2 seconds
(12)Hardware Reset
Verify the result by repeating step 1. (2) – (3)
R
+
SSD1850/51
VCC
RES
16-18V
Note: R = 1K ~ 10k ohm
C = 1u ~ 4.7u F
OTP Programming Circuit
C
(8)
(1) & (6) & (12)
GND
GND



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