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ST7541 Datasheet(PDF) 49 Page - Sitronix Technology Co., Ltd. |
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ST7541 Datasheet(HTML) 49 Page - Sitronix Technology Co., Ltd. |
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49 / 78 page  ST7541 Ver 1.9 49/78 2007/9/3 Set Display Data Length (3-Line SPI Mode) Consists of 2 bytes instruction. This command is used in 3-Line SPI mode only(PS0 = ”L” and PS1 = ”L” ). It will be two continuous commands, the first byte control the data direction(write mode only) and inform the LCD driver the second byte will be number of data bytes will be write. When A0 is not used, the Display Data Length instruction is used to indicate that a specified number of display data bytes are to be transmitted. The next byte after the display data string is handled as command data. The 1 st Instruction: Set Data Direction (Only Write Mode) A0 RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 X x 1 1 1 0 1 0 0 0 The 2 nd Instruction: Set Display Data Length (DDL) Register A0 RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 x x D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 Display Data Length 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 2 0 0 0 0 0 0 1 0 3 : : : : : : : : : 1 1 1 1 1 1 0 1 254 1 1 1 1 1 1 1 0 255 1 1 1 1 1 1 1 1 256 Set PWM & FRC mode Selects 3/4 FRC and 9 / 12 / 15 PWM A0 RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 1 0 0 1 0 FRC PWM1 PWM0 FRC PWM1 PWM0 Status of PWM & FRC 0 1 – – 4FRC 3FRC – 0 1 1 0 or 1 0 1 9PWM 12PWM 15PWM NOP No operation A0 RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 1 1 1 0 0 0 1 1 Test Instruction This instruction is for testing IC. Please do not use it. A0 RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 0 0 1 1 1 1 x x x x |
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