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| Princeton Technology Corp. LCD Driver IC TelG 886-2-29162151 Fax 886-2-29174598 G URL: http://www.princeton.com.tw Preliminary 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 TelG 886-2-29162151 Fax 886-2-29174598 G URL: http://www.princeton.com.tw Preliminary PT6554 PIN CONFIGURATION 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 34 38 47 46 43 41 40 39 36 48 45 44 42 KS6 KI1 KI2 KI3 KI4 KI5 TEST VDD VDD1 VDD2 VSS OSC DO CE CLK DI 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 37 35 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 S G3 3 K S5 K S4 K S3 SG32 SG31 SG30 SG29 SG28 SG27 SG26 SG25 SG24 SG23 SG22 SG21 SG20 SG19 SG18 SG17 S G1/P 1 SG2/P 2 SG3/P 3 SG4/P 4 S G10 S G11 S G5 S G6 S G7 S G8 S G9 S G12 S G13 S G14 S G15 PT6554 pre 1.0 - 2- S G16 January 10, 2002 Princeton Technology Corp. LCD Driver IC TelG 886-2-29162151 Fax 886-2-29174598 G URL: http://www.princeton.com.tw Preliminary PT6554 APPLICATION CIRCUIT 1 (P1) (P2) (P3) (P4) OSC COM1 +5V *1 V SS C > 0.047 g F TEST V DD COM1 COM1 COM1 P1/SG1 P2/SG2 V DD1 V DD2 C P3/SG3 P4/SG4 SG5 (general-purpose output ports) Used with the backlight controller or other ciucuit. CE From the controller To the controller To the controller power supply *2 CLK DI DO KKKKK IIIII 54321 KKKK SSSS 6543 SG39 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 1k[ to 10k[ . 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- LCD pa ne l (up to 164 segments) January 10, 2002 Princeton Technology Corp. LCD Driver IC TelG 886-2-29162151 Fax 886-2-29174598 G URL: http://www.princeton.com.tw Preliminary PT6554 APPLICATION CIRCUIT 2 (P1) (P2) (P3) (P4) (general-purpose output ports) Used with the backlight controller or other ciucuit. OSC COM1 +5V *1 V SS V DD COM1 COM1 COM1 P1/SG1 P2/SG2 P3/SG3 V DD1 V DD2 C C P4/SG4 SG5 TEST CE From the controller To the controller To the controller power supply CLK DI DO 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 SG39 S G 4 1 / K S 2 S G 4 0 / K S 1 (P40) (P41) *2 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 1k[ to 10k[ . 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- L CD pane l (up t o 164 seg me nt s) C > 0.047g F January 10, 2002 Princeton Technology Corp. LCD Driver IC TelG 886-2-29162151 Fax 886-2-29174598 G URL: http://www.princeton.com.tw Preliminary PT6554 APPLICATION CIRCUIT 3 (P1) (P2) (P3) (P4) OSC COM1 +5V *1 C > 0.047 g F 10k > R >1 k [ R1 VD D1 R2 VD D2 C C R3 VSS [ TEST VD D COM1 COM1 COM1 P1/SG1 P2/SG2 P3/SG3 P4/SG4 SG5 (general-purpose output ports) Used with the backlight controller or other ciucuit. CE From the controller To the controller To the controller power supply CLK DI DO 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) *2 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 1k[ to 10k[ . 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- L CD pan el (up to 16 4 seg ments ) January 10, 2002 |
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