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ST7565 Datasheet(PDF) 8 Page - Sitronix Technology Co., Ltd. |
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ST7565 Datasheet(HTML) 8 Page - Sitronix Technology Co., Ltd. |
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8 / 56 page  ST7565 Ver 1.0a 8/56 2002/06/24 P PIIN N D DE ES SC CR RIIP PT TIIO ON NS S Power Supply Pins Pin Name I/O Function No. of Pins VDD Power Supply Shared with the MPU power supply terminal Vcc. 13 VSS Power Supply This is a 0V terminal connected to the system GND. 9 VSS2 Power Supply This is the reference power supply for the step-up voltage circuit for the liquid crystal drive. 4 VRS Power Supply This is the externally-input VREG power supply for the LCD power supply voltage regulator. These are only enabled for the models with the VREG external input option. 2 V1, V2, V3, V4, V5 Power Supply Power This is a multi-level power supply for the liquid crystal drive. The voltage Supply applied is determined by the liquid crystal cell, and is changed through the use of a resistive voltage divided or through changing the impedance using an op. amp. Voltage levels are determined based on VDD, and must maintain the relative magnitudes shown below. VDD (= V0) ≧V1 ≧V2 ≧V3 ≧V4 ≧V5 When the power supply turns ON, the internal power supply circuits produce the V1 to V4 voltages shown below. The voltage settings are selected using the LCD bias set command. 1/65 DUTY 1/49 DUTY 1/33 DUTY 1/55 DUTY 1/53 DUTY V1 V2 V3 V4 1/9*V5,1/7*V5 2/9*V5,2/7*V5 7/9*V5,5/7*V5 8/9*V5,6/7*V5 1/8*V5,1/6*V5 2/8*V5,2/6*V5 6/8*V5,4/6*V5 7/8*V5,5/6*V5 1/6*V5,1/5*V5 2/6*V5,2/5*V5 4/6*V5,3/5*V5 5/6*V5,4/5*V5 1/8*V5,1/6*V5 2/8*V5,2/6*V5 6/8*V5,4/6*V5 7/8*V5,5/6*V5 1/8*V5,1/6*V5 2/8*V5,2/6*V5 6/8*V5,4/6*V5 7/8*V5,5/6*V5 10 LCD Power Supply Pins Pin Name I/O Function No. of Pins CAP1+ O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP1- terminal. 2 CAP1– O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP1+ terminal. 2 CAP2+ O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP2- terminal. 2 CAP2– O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP2+ terminal. 2 CAP3– O DC/DC voltage converter. Connect a capacitor between this terminal and the CAP1+ terminal. 2 VOUT O DC/DC voltage converter. Connect a capacitor between this terminal and VSS. 2 VR I Output voltage regulator terminal. Provides the voltage between VDD and V5 through a resistive voltage divider. IRS = “L” : the V5 voltage regulator internal resistors are not used . IRS = “H” : the V5 voltage regulator internal resistors are used . 2 |
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