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CT6523 Dataheets PDF



Part Number CT6523
Manufacturers ETC
Logo ETC
Description 1/3 Duty General Purpose LCD Driver IC
Datasheet CT6523 DatasheetCT6523 Datasheet (PDF)

1/3 Duty General Purpose LCD Driver IC CT6523 DESCRIPTION CT6523 is an LCD Driver IC which can drive up to 156 segments. It can be used for frequency display in microprocessor-controlled radio receiver and in other display applications. CT6523 supports both 1/2 bias, 1/3 duty and 1/3 duty, 1/3 bias. Pin assignments and application circuit are optimized for easy PCB layout and cost saving advantages. FEATURES • Up to 156 Segments Outputs • 1/3 Duty - 1/2 Bias and 1/3 Duty - 1/3 Bias Drive Tech.

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1/3 Duty General Purpose LCD Driver IC CT6523 DESCRIPTION CT6523 is an LCD Driver IC which can drive up to 156 segments. It can be used for frequency display in microprocessor-controlled radio receiver and in other display applications. CT6523 supports both 1/2 bias, 1/3 duty and 1/3 duty, 1/3 bias. Pin assignments and application circuit are optimized for easy PCB layout and cost saving advantages. FEATURES • Up to 156 Segments Outputs • 1/3 Duty - 1/2 Bias and 1/3 Duty - 1/3 Bias Drive Techniques • Power Saving Mode and all Segments OFF Function • Direct Display of Display Data without using a Decoder • RC Oscillation Circuit • Power Supply Voltage: 4.5 to 6V • LCD Drive Bias Voltage can be provided internally or externally • Available in 64 pins, QFP or LQFP APPLICATIONS • Electronic Dictionary / Translator • P.O.S. • Caller ID • Pager • Mini Compo • Electronic Equipment with LCD Display CT6523 V1.0 -1- June, 2006 1/3 Duty General Purpose LCD Driver IC BLOCK DIAGRAM COM1 COM2 COM3 SG52 CT6523 SG5 SG4 SG3 SG2 SG1 VDD1 VDD2 /INH COMMON DRIVER SEGMENT DRIVER & LATCH OSC DI CLK CE VDD VSS CLOCK GENERATOR ADDRESS DETECTOR SHIFT REGISTER CT6523 V1.0 -2- June, 2006 1/3 Duty General Purpose LCD Driver IC CT6523 INPUT/OUTPUT CONFIGURATIONS The schematic diagrams of the input and output circuits of the logic section are shown below: INPUT PIN: CLK, CE, DI VDD V SS OUTPUT PIN: COM1 TO COM3, SG1 TO SG52 VDD VDD1 VSS VDD2 CT6523 V1.0 -3- June, 2006 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 SG48 SG47 SG46 SG45 SG44 SG43 SG42 SG41 SG40 SG39 SG38 SG37 SG36 SG35 SG34 SG33 1/3 Duty General Purpose LCD Driver IC PIN CONFIGURATION SG49 SG50 SG51 SG52 COM1 COM2 COM3 VDD /INH VDD1 VDD2 VSS OSC CE CLK DI 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 CT6523 CT6523 32 SG32 31 SG31 30 SG30 29 SG29 28 SG28 27 SG27 26 SG26 25 SG25 24 SG24 23 SG23 22 SG22 21 SG21 20 SG20 19 SG19 18 SG18 17 SG17 SG1 SG2 SG3 SG4 SG5 SG6 SG7 SG8 SG9 SG10 SG11 SG12 SG13 SG14 SG15 SG16 CT6523 V1.0 -4- June, 2006 1/3 Duty General Purpose LCD Driver IC CT6523 PIN DESCRIPTION Pin Name SG1 to SG52 COM1 to COM3 VDD /INH VDD1 VDD2 VSS OSC CE CLK DI I/O Description O Segment Output Pins Common Driver Output Pins - Power Supply Display OFF Control Input Pin I When this pin is Low, the display is forcibly turned off. (SG1~SG52, COM1~COM3 are set to Low) (see Note) Used for the 2/3 Bias Voltage when the Bias Voltages are I provided externally. Connect to VDD2 when 1/2 bias is used. Used for 1/3 Bias Voltage when the Bias Voltage are I provided externally. Connect to VDD1 when 1/2 Bias is used. - Ground Pin I/O Oscillation Input/Output Pin I Chip Enable Pin I Synchronization Clock I Transfer Data Pin Pin No. 1~52 53~55 56 57 58 59 60 61 62 63 64 Note: 1. When /INH = Low: Serial data transfers can be performed when the display is forcibly off. CT6523 V1.0 -5- June, 2006 1/3 Duty General Purpose LCD Driver IC FUNCTION DESCRIPTION SERIAL DATA TRANSFER CONDITION 1: CLK IS TERMINATED AT THE “LOW” LEVEL CT6523 CONDITION 2: CLK IS TERMINATED AT THE “HIGH” LEVEL Note: 1. Address: 41H 2. D1 to D156 = Display Data When D1 to D156 are set to “1”, Display is turned ON. When D1 to D156 are set to “0”, Display is turned OFF. 3. DR = 1/2 Bias Drive or 1/3 Bias Drive Switching Control Data 4. SC = Segment ON/OFF Control Data 5. BU = Normal Mode/Power-Saving Control Data 6. x = Not Relevant For example, there are 63 segments that are being used, the 63 bits of display data (D94 to D156) must be sent. Please refer to the diagram below. 8 BITS 67 BITS 10000010 D94 D95 D96 D154 D155 D156 DR SC BU X ←------------ ADDRESS Note: x = Not Relevant ------------→ CT6523 V1.0 -6- June, 2006 1/3 Duty General Purpose LCD Driver IC CT6523 CONTROL DATA DR: 1/2 BIAS DRIVE OR 1/3 BIAS DRIVE SWITCHING CONTROL DATA. DR is the 1/2 bias drive or 1/3 bias drive switching control data bit. It is used to select either 1/2 bias drive or 1/3 bias drive. When this pin is set to “0” the 1/2 bias drive is selected. When this pin is set to “1’, the 1/3 bias drive is selected. Please refer to the table below for the DR settings. DR Drive Type “0” 1/2 Bias Drive “1” 1/3 Bias Drive SC: SEGMENT ON/OFF CONTROL DATA SC is the Segment ON/OFF Control Data Bit. It is used to select the state of the segments. If the SC is set to “0”, then the Segment Display are turned ON, however, if the SC is set to “1”, the Display State is OFF. Please refer to the table below. SC Display State “0” ON “1” OFF It should be noted that when the segments are turned off via the SC setting (SC=”1”), the segments are turned off the outputting of the segment OFF waveforms from the Segment Output Pins. BU: NORMAL MODE/POWER SAVING MODE CONTROL DATA BIT BU is the Normal Mode/Power Saving Mode Control Data Bit. It is used to select either the Normal Mode or the Power saving Mode. When the BU is set to “0”, the Normal Mode is enabled, however, if the.


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