Princeton Technology Corp. LCD Driver IC Preliminary Tel：886-2-29162151 Fax：886-2-29174598 URL: http://www.princeton.com.tw PT6554 DESCRIPTION PT6554 is a high performance Liquid Crystal Display (LCD) Driver IC utilizing CMOS Technology specially designed with Key Input Function. It can drive up to a maximum of 164 segments and control up to 4 general purpose output ports. It includes a Key Scan Circuit that can support up to 30 key inputs and provides On-Chip Voltage Detection Type Reset Circuit which prevents incorrect display. Display Data can be directly displayed without using any decoder. PT6554 also supports both 1/4 duty-1/2 bias and 1/4 duty-1/3 bias drive techniques. Pin assignments and application circuit are optimized for easy PCB Layout and cost saving advantages. FEATURES • • • • • • • • • CMOS Technology Up to 164 Segment Drivers (4 Com x 41 Seg) Up to 4 General Purpose Output Ports Key Input Function 1/4 Duty-1/2 Bias and 1/4 Duty-1/3 Bias Drive Techniques Sleep Mode & All Segment OFF Function On-Chip Voltage Detection Type Reset Circuit RC Oscillation Circuit Available in 64 pins, QFP or LQFP Package APPLICATION • Electronic Equipment with LCD Display PT6554 pre 1.0 - 1- January 10, 2002 Princeton Technology Corp. LCD Driver IC Tel：886-2-29162151 Fax：886-2-29174598 URL: http://www.princeton.com.tw PT6554 Preliminary K S5 K S4 K S3 S G4 1/KS 2 S G4 0/KS 1 COM4 COM3 COM2 COM1 S G3 9 S G3 8 S G3 7 S G3 6 S G3 5 S G3 4 S G3 3 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 PIN CONFIGURATION KI4 53 28 SG28 KI5 54 27 SG27 TEST 55 26 SG26 VDD 56 25 SG25 VDD1 57 24 SG24 VDD2 58 23 SG23 VSS 59 22 SG22 OSC 60 21 SG21 DO 61 20 SG20 CE 62 19 SG19 CLK 63 18 SG18 DI 64 17 SG17 PT6554 pre 1.0 - 2- S G16 SG29 S G15 29 S G14 52 S G13 KI3 S G12 SG30 S G11 30 S G10 51 S G9 KI2 S G8 SG31 S G7 31 S G6 50 S G5 KI1 SG4/P 4 SG32 SG3/P 3 32 SG2/P 2 49 S G1/P 1 KS6 January 10, 2002 Princeton Technology Corp. LCD Driver IC Tel：886-2-29162151 Fax：886-2-29174598 URL: http://www.princeton.com.tw PT6554 Preliminary APPLICATION CIRCUIT 1 (P1) (P2) (P3) (P4) (general-purpose output ports) Used with the backlight controller or other ciucuit. OSC COM1 V DD COM1 *1 C > 0.047 μF COM1 V SS COM1 TEST LCD pa ne l (up to 164 segments) +5V P1/SG1 P2/SG2 P3/SG3 V DD1 P4/SG4 V DD2 SG5 C SG39 CE From the controller CLK To the controller DI To the controller power supply DO *2 K K K K S S S S 6 5 4 3 K K K K K I I I I I 5 4 3 2 1 S G 4 1 / K S 2 S G 4 0 / K S 1 (P40) (P41) Key matrix (up to 30 keys) Notes: 1. A capacitor must be added to the power line so that both the power supply voltage (VDD) rise time when power is applied and the power supply voltage (VDD) fall time when power drops are at least 1 ms. 2. DO is an open - drain output and requires a pull- high resistor between 1kΩ to 10kΩ. The pull- up resistor value must be appropriate to the capacitor of the external wiring so that the signal waveforms are not degraded. PT6554 pre 1.0 - 3- January 10, 2002 Princeton Technology Corp. LCD Driver IC Tel：886-2-29162151 Fax：886-2-29174598 URL: http://www.princeton.com.tw PT6554 Preliminary APPLICATION CIRCUIT 2 (P1) (P2) (P3) (P4) (general-purpose output ports) Used with the backlight controller or other ciucuit. OSC COM1 V DD COM1 *1 COM1 V SS C > 0.047μ F COM1 TEST L CD pane l (up t o 164 seg me nt s) +5V P1/SG1 P2/SG2 P3/SG3 V DD1 P4/SG4 V DD2 C SG5 C SG39 CE From the controller CLK To the controller DI To the controller power supply DO *2 K I 5 K I 4 K I 3 K I 2 K I 1 K S 6 K S 5 K S 4 K S 3 S G 4 1 / K S 2 S G 4 0 / K S 1 (P40) (P41) Key matrix (up to 30 keys) Notes: 1. A capacitor must be added to the power line so that both the power supply voltage (VDD) rise time when power is applied and the power supply voltage (VDD) fall time when power drops are at least 1 ms. 2. DO is an open - drain output and requires a pull- high resistor between 1kΩ to 10kΩ. The pull- up resistor value must be appropriate to the capacitor of the external wiring so that the signal wave forms are not degraded. PT6554 pre 1.0 - 4- January 10, 2002 Tel：886-2-29162151 Fax：886-2-29174598 Princeton Technology Corp. LCD Driver IC URL: http://www.princeton.com.tw PT6554 Preliminary APPLICATION CIRCUIT 3 (P1) (P2) (P3) (P4) (general-purpose output ports) Used with the backlight controller or other ciucuit. OSC COM1 VD D COM1 *1 C > 0.047 μF 10k Ω > R >1 k Ω COM1 VS S COM1 TEST P1/SG1 P2/SG2 R1 P3/SG3 VD D1 P4/SG4 R2 SG5 VD D2 C C L CD pan el (up to 16 4 seg ments ) +5V R3 CE From the controller CLK To the controller DI To the controller power supply DO *2 K I 5 K I 4 K I 3 K I 2 K I 1 K S 6 K S 5 K S 4 K S 3 S G 4 1 / K S 2 SG39 S G 4 0 / K S 1 (P40) (P41) Key matrix (up to 30 keys) Notes: 1. A capacitor must be added to the power line so that both the power supply voltage (VDD) rise time when power is applied and the power supply voltage (VDD) fall time when power drops are at least 1 ms. 2. DO is an open-drain output and requires a pull- high resistor between 1kΩ to 10kΩ. The pull- up resistor value must be appropriate to the capacitor of the external writing so that the signal wavefroms are not degraded. 3. R1=R2=R3, the resistance value must be decide by the LCD panel size. PT6554 pre 1.0 - 5- January 10, 2002