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LC74725 Datenblatt(PDF) 8 Page - Sanyo Semicon Device |
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LC74725 Datenblatt(HTML) 8 Page - Sanyo Semicon Device |
8 / 16 page No. 5213-8/16 LC74725, 74725M Display Control Commands Display control commands have an 8-bit format and are transferred using the serial input function. Commands consist of a command identification code in the first byte and command data in the following bytes. The following commands are supported. x COMMAND0: Display memory (VRAM) write address setup command y COMMAND1: Display character data write command z COMMAND2: Vertical display start position and vertical character size setup command { COMMAND3: Horizontal display start position and horizontal character size setup command | COMMAND4: Display control setup command } COMMAND5: Display control setup command Display Control Command Table Once written, the command identification code in the first byte is stored until the next first byte is written. However, when the display character data write command (COMMAND1) is written, the LC74725/M locks into the display character data write mode, and another first byte cannot be written. When a high level is input to the CS pin, the LC74725/M is set to COMMAND0 (display memory write address setup mode). x COMMAND0 (Display memory write address setup command) First byte First byte Second byte Command Command identification code Data Data 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 COMMAND0 1 0 0 0 V3 V2 V1 V0 0 0 0 H4 H3 H2 H1 H0 Set write address COMMAND1 1 0 0 1 0 0 0 0 at 0 c5 c4 c3 c2 c1 c0 Write character COMMAND2 1 0 1 0 0 VS 0 VS 0 FS VP VP VP VP VP VP Set vertical display start position and 20 10 5 4 3 2 1 0 vertical character size COMMAND3 1 0 1 1 EGP HS 0 HS 0 LC HP HP HP HP HP HP Set horizontal display start position 20 10 5 4 3 2 1 0 and horizontal character size COMMAND4 1 1 0 0 TST RAM OSC SYS 0 EGL NON EG BK BK RV DSP Display control MOD ERS STP RST 1 0 ON COMMAND5 1 1 0 1 BCL PH RSN INT 0 0 0 MUT MOD CTL CTL SEL Synchronizing signal control 0 3 2 0 Register content DA0 to DA7 Register name State Function Note 7 — 1 6 — 0 Command 0 identification code 5 — 0 Set the display memory write address. 4 — 0 3 V3 0 1 2 V2 0 1 Display memory row address (0 to 9 hexadecimal) 1 V1 0 1 0 V0 0 1 |
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