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ST7066 Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers |
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ST7066 Datasheet(HTML) 5 Page - List of Unclassifed Manufacturers |
5 / 29 page ST7066 V1.2 2000/6/13 5 Pin Functions NAME NUMBER I/O INTERFACED WITH FUNCTION RS 1 I MPU Select registers. 0: Instruction register (for write) Busy flag: address counter (for read) 1: Data register (for write and read) R/W 1 I MPU Select read or write. 0: Write 1: Read E 1 I MPU Starts data read/write. DB4 to DB7 4 I/O MPU Four high order bi-directional tristate data bus pins. Used for data transfer and receive between the MPU and the ST7066. DB7 can be used as a busy flag. DB0 to DB3 4 I/O MPU Four low order bi-directional tristate data bus pins. Used for data transfer and receive between the MPU and the ST7066. These pins are not used during 4-bit operation. CL1 1 O Extension driver Clock to latch serial data D sent to the extension driver CL2 1 O Extension driver Clock to shift serial data D M 1 O Extension driver Switch signal for converting the liquid crystal drive waveform to AC D 1 O Extension driver Character pattern data corresponding to each segment signal COM1 to COM16 16 O LCD Common signals that are not used are changed to non-selection waveform. COM9 to COM16 are non-selection waveforms at 1/8 duty factor and COM12 to COM16 are non-selection waveforms at 1/11 duty factor. SEG1 to SEG40 40 O LCD Segment signals V1 to V5 5 - Power supply Power supply for LCD drive VCC - V5 = 11 V (Max) VCC , GND 2 - Power supply VCC : 2.7V to 5.5V, GND: 0V OSC1, OSC2 2 Oscillation resistor clock When crystal oscillation is performed, a resistor must be connected externally. When the pin input is an external clock, it must be input to OSC1. Note: 1. Vcc>=V1>=V2>=V3>=V4>=V5 must be maintained 2. Two clock options: R OSC1 1 OSC2 1 OSC1 1 OSC2 1 Clock input R=91K (Vcc=5V) R=75K |
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