Page 4 - PWM Programming example
Display Backlight: The display forward voltage was measured at one part to be 10.4V at 20mA current. That means a relative large voltage is needed. This voltage can be easily generated with a PWM signal generator of the µC. (Do not forget to switch on the current limitation of your power supply unti...
Page 5 - Initialization Commands:
5 I) LS020 - Display: Software - (Commands and Data): Data and commands to the display controller are distinguished by the RS line. If RS is high, the controller expects commands, if the RS line is low it expects data. RS = high Command RS = low Data Initialization Commands: A LCD TFT display is pro...
Page 6 - OR; XS; degree
6 The second sequence follows directly and is: INIT3: 0xEF90, 0x0983, 0x0800, 0x0BAF, 0x0A00, 0x0500, 0x0600, 0x0700 0xEF00 0xEE0C 0xEF90, 0x0080 0xEFB0, 0x4902 0xEF00 0x7F01, 0xE181 0xE202 0xE276 0xE183 0x8001 0xEF90, 0x0000 After the initialization sequence the display is ready to use. An immediat...
Page 7 - YS; to
With OR = 0x04 the memory is written in X-direction, that means line by line in X-direction from left (low X-number) to right (high X-number). With OR = 0x00 the display memory is written in Y-direction, that means from column by column from YS to 131 . Pixel Color Coding: The display memory is init...
Page 11 - Reengineering the S65 Display:
Reengineering the S65 Display: The Siemens S65 display is a special manufacturing for the Siemens AG (now Siemens/BenQ). Because of that it is very difficult to get data sheets for the used display controller. The display is a product of Seiko-Epson but does not response to the known Epson display c...
Page 12 - write complete display memory:
12 Start Up Sequence: The following sequences for starting the display could be identified: Sequence 1: (time 0ms) 0xFDFD, 0xFDFD Sequence 2: (time 68ms after start) 0xEF00, 0xEE04, 0x1B04, 0xFEFE, 0xFEFE 0xEF90, 0x4A04, 0x7F3F, 0xEE04, 0x4306 Sequence 3: (time 75ms after start) 0xEF90, 0x0983, 0x08...
Page 13 - Power Down Sequence:
13 Power Down Sequence: Unfortunately the power down sequence could not be measured with the used equipment. It was not possible to find a proper trigger condition to get a reliable repeatable measurement of the power down sequence. Triggering to the backlight was possible but the memory of the digi...