and use the command set the user must sent a command prefix byte followed by a command byte. Some commands require parameters, and are not executed until all parameters are received. Others require no additional information and are executed immediately when received. The command prefix is the single byte 0xFE (decimal 254). Sending the command prefix to the GLK instructs it to await another byte containing the command that needs to be executed. When the GLK receives the command byte, it will eit.
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GLK12232-25
User Manual
Connecting GLK12232-25 The GLK12232-25 serial interface display has two types of communications: RS-232 and I²C. The pin functions on the GLK12232-25 are as follows: I²C Pin 4: Pin 5: Pin 6: Pin 7: RS-232 Pin 7: GND Pin 8: Rx Pin 9: Tx Pin 10: +5V Keypad Connector Pin 14: Pin 15: Pin 16: Pin 17: Pin 18: Pin 19: Pin 20: Pin 21: Pin 22: Pin 23: Column 1 Column 2 Column 3 Column 4 Column 5 Row 1 Row 2 Row 3 Row 4 Row 5 +5Vdc SCL SDA GND
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Additional Pins Note: All of the pin functions listed here are No Connect Pin 1: N.C. (Pin 1) Pin 2: GND Pin 3: GND Pin 11: N.C. (G1) Pin 12: N.C. (G2) Pin 13: GND Pin 24: N.C. (Rst) Pin 25: N.C.
GLK12232-25 Datasheet
