Silan Semiconductors SC75823 1/3 DUTY GENERAL-PURPOSE LCD DRIVER DESCRIPTION The SC75823 is a general-purpose LCD driver that can be used for frequency display in microprocessor-controlled radio receives QFP-64-14x14-0.8 and in other display applications. In addition to being able to directly drive up to 156 LCD segments. FEATURES • Supports both 1/3 duty 1/2 bias and 1/3 duty 1/3 bias LCD drive of up to 156 segments under serial data control. • Serial data input supports CCB format communication with the LQFP-64-10 x 10-0.5 system controller. • Serial data control of the power-saving mode based backup function and all the segments forced off function. • High generality since display data is displayed directly without ORDERING INFORMATION Device decoder intervention. • The INH pin can force the display to the off state. Package SC75823A • The LCD drive bias voltage can be provided internally or SC75823B LQFP-64-10 X 10-0.5 QFP-64-14 X 14-0.8 externally. • Power supply voltage: 4.5 to 6.0V BLOCK DIAGRAM COM1 COM2 COM3 S52 S51 VDD1 S1 Latch & Driver Common Driver VDD2 INH Shift Register OSC Clock Generator Address Detector DI CL CE VDD VSS HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD 1 Rev: 1.1 2002.03.04 Silan Semiconductors SC75823 S48 S47 S46 S45 S44 S43 S42 S41 S40 S39 S38 S37 S36 S35 S34 S33 PIN CONFIGURATION 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 S49 49 32 S32 S50 50 31 S31 S51 51 30 S30 S52 52 29 S29 COM1 53 28 S28 COM2 54 27 S27 COM3 55 26 S26 VDD 56 25 S25 SC75823 INH 57 24 S24 7 8 9 10 11 12 13 14 15 16 S16 6 S15 5 S14 4 S13 3 S12 2 S8 1 S11 17 S17 S9 18 S18 DI 64 S10 19 S19 CL 63 S7 CE 62 S6 20 S20 S5 21 S21 OSC 61 S4 22 S22 VSS 60 S3 VDD2 59 S2 23 S23 S1 VDD1 58 ABSOLUTE MAXIMUM RATINGS (Tamb=25°C, VSS=0 V) Characteristics Maximum Supply Voltage Input Voltage Output Voltage Output Current Symbol Value VDDmax -0.3 to +6.5 Unit V VIN1 -0.3 to +6.5 V V VIN2 -0.3 to VDD+0.3 VOUT -0.3 to VDD+0.3 V IOUT1 300 µA IOUT2 3 mA PDmax 200 mW Operating Temperature Topr -40 to +85 °C Storage Temperature Tstg -55 to 125 °C Allowable Power Dissipation HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 2 2002.03.04 Silan Semiconductors SC75823 ALLOWABLE OPERATING RANGE (Tamb=-40 to +85°C, VSS=0V) Characteristics Symbol Input Voltage Test Condition VDD VDD VDD1 VDD1 VDD2 VDD2 Supply Voltage Min. Typ. Max. Unit 6.0 V 2/3VDD 6.0 V 1/3VDD 6.0 V 4.5 Input High level Voltage VIH CE, CL, DI, INH 4.0 6.0 V Input Low Level Voltage VIL CE, CL, DI, INH 0 0.7 V Recommended External Resistance ROSC OSC 47 Recommended External Capacitance COSC OSC 1000 Guaranteed Oscillator Range fOSC OSC 19 38 kΩ pF 76 kHz Data Setup Time tds CL, DI: figure 2 100 ns Data Hold Time tdh CL, DI: figure 2 100 ns CE Wait Time tcp CE, CL: figure 2 100 ns CE Setup Time tcs CE, CL: figure 2 100 ns CE Hold Time tch CE, CL: figure 2 100 ns High-level Clock Pulse Width tφH CL: figure 2 100 ns Low-level Clock Pulse Width tφL CL: figure 2 100 ns Rise Time tr CE, CL, DI: figure 2 100 Fall Time tf CE, CL, DI: figure 2 100 INH Switching Time t2 INH , CE: figure 3 10 Test Condition Min. ns ns µs ELECTRICAL CHARACTERISTICS Characteristics Symbol Input High Level Current IIH Input Low Level Current IIL Oscillator Frequency Hysteresis Width Output High Level Voltage fOSC VH VOH1 CE, CL, DI, INH ; VI=6V CE, CL, DI, INH ; VI=0V CE, CL, DI, INH ; VDD=5V VOL1 S1 to S52; IO=20µA Output High Level Voltage VOH2 COM1 to COM3; IO=-100µA Output Low Level Voltage VOL2 COM1 to COM3; IO=100µA Intermediate Level Voltage VMID2 1/2 bias, COM1 to COM3; IO=±100µA 1/3 bias, COM1 to COM3; IO=±100µA Unit 5 µA µA 38 COSC=1000pF S1 to S52; IO=-20µA Max. -5 OSC;ROSC=47kΩ, Output Low Level Voltage VMID1 Typ. kHz 0.3 V VDD-1.0 V 1.0 VDD-1.0 V V 1.0 V 1/2VDD±1.0 V 2/3VDD±1.0 V (To be continued) HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 3 2002.03.04 Silan Semiconductors SC75823 (Continued) Characteristics Symbol VMID3 VMID4 Intermediate Level Voltage* VMID5 Supply Current Test Condition Min. 1/3 bias, COM1 to COM3; IO=±100µA 1/3 bias, S1 to S52; S1 to S52; IO=±20µA 1/3 bias, IO=±20µA Typ. Max. Unit 1/3VDD±1.0 V 2/3VDD±1.0 V 1/3VDD±1.0 V IDD1 Power saving mode 5 µA IDD2 f=38kHz, 1/2 bias, VDD=5V 400 800 µA IDD3 f=38kHz, 1/3 bias, VDD=5V 300 600 µA IDD2 f=38kHz, 1/2 bias, VDD=6V 650 1300 µA IDD3 f=38kHz, 1/3 bias, VDD=8V 580 1200 µA Note: * Except the bias voltage generation divider resistors that are built into VDD1 and VDD2.(see figure 1) Figure 1 VDD VDD1 To the common segment driver VDD2 Except these resistors HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 4 2002.03.04 Silan Semiconductors SC75823 Fig 2 1.When CL is stopped at the low level VIH CE VIL t¶H CL t¶L VIH 50% VIL VIH tf tr DI VIH VIH VIL VIL tds VIH VIL tcp tcs tch tdh 2.When CL is stopped at the high level VIH CE VIL t¶L CL t¶H VIH 50% VIL VIH tr DI VIH VIL tf VIH VIH VIL VIL tds tcp tcs tch tdh HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 5 2002.03.04 Silan Semiconductors SC75823 PIN DESCRIPTION Pin No Symbol 1-52 I/O S1 to S52 53 COM1 54 COM2 55 COM3 61 OSC 62 CE Description Segment outputs for displaying the display data transferred by serial data O input. Common driver outputs. The frame frequency fO is given by: O fO=(fOSC/384)Hz Oscillator connection I/O An oscillator circuit is formed by connecting an external resistor and capacitor to this pin. 63 CL 64 DI Serial data transfer inputs. These pins are I connected to the control microprocessor. CE: chip enable CL: synchronization clock DI: transfer data Display off control input INH =low (VSS)……Display forced off (S1 to S52, COM1 to COM3=low) INH 57 I INH =high (VDD)……Display on note that serial data transfers can be performed when the display is forced off. Used for the 2/3 bias voltage when bias voltage are provided externally. 58 VDD1 I 59 VDD2 I 56 VDD -- Power supply. Provide a voltage of between 4.5 and 6.0V 60 VSS -- Ground. Connect this pin to the system ground. Connect to VDD2 when 1/2 bias is used. Used for the 1/3 bias voltage when bias voltage are provided externally. Connect to VDD1 when 1/2 bias is used. FUNCTION DESCRIPTION Serial data transfer format 1. When CL is stopped at the low level CE CL DI 1 0 0 0 0 0 1 0 B0 B1 B2 B3 A0 A1 A2 A3 D1 D2 D3 Display data 156 bits CCB address 8 bits D154 D155 D156 DR SC BU * Control data 4 bits *: don't care HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 6 2002.03.04 Silan Semiconductors 2. SC75823 When CL is stopped at high level CE CL DI 1 0 0 0 0 0 1 0 B0 B1 B2 B3 A0 A1 A2 A3 D1 D2 D3 D154 D155 D156 Display data 156 bits CCB address 8 bits DR SC BU * Control data 4 bits *: don't care • CCB address…….41H • D1 to D156……….Display data Dn (n=1 to 156)=1……..Display on Dn (n=1 to 156)=0……..Display off • DR…………………1/2-bias drive or 1/3-bias drive switching control data • SC…………………Segments on/off control data • BU…………………Normal mode/power-saving mode control data Serial data transfer examples • When 63 segments are used 63 bits is display data (D94 to D156) must be sent. 8 bits 67 bits 1 0 0 0 0 0 1 0 B0 B1 B2 B3 A0 A1 A2 A3 D94 D95 D96 D154 D155 D156 DR SC SU * *: don't care Control data function 1. DR: 1/2-bias drive or 1/3-bias drive switching control data This control data selects either 1/2-bias drive or 1/3-bias drive. DR Drive type 0 1/2-bias drive 1 1/3-bias drive 2. SC: segments on/off control data This control data bit controls the on/off state of the segments. SC Display state 0 On 1 Off HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 7 2002.03.04 Silan Semiconductors SC75823 However, note that when the segments are turned off by setting SC to 1, the segments are turned off by outputting segment off waveforms from the segment output pins. 3. BU: Normal mode/power-saving mode control data BU Mode 0 Normal mode 1 Power-saving mode. In this mode the OSC pin oscillator is stopped and the common and segment pins output VSS levels. Display data to segment output pin correspondence Segment COM3 COM2 COM1 S1 D1 D2 D3 S2 D4 D5 S3 D7 S4 Segment COM3 COM2 COM1 S27 D79 D80 D81 D6 S28 D82 D83 D84 D8 D9 S29 D85 D86 D87 D10 D11 D12 S30 D88 D89 D90 S5 D13 D14 D15 S31 D91 D92 D93 S6 D16 D17 D18 S32 D94 D95 D96 S7 D19 D20 D21 S33 D97 D98 D99 S8 D22 D23 D24 S34 D100 D101 D102 S9 D25 D26 D27 S35 D103 D104 D105 S10 D28 D29 D30 S36 D106 D107 D108 S11 D31 D32 D33 S37 D109 D110 D111 S12 D34 D35 D36 S38 D112 D113 D114 S13 D37 D38 D39 S39 D115 D116 D117 S14 D40 D41 D42 S40 D118 D119 D120 S15 D43 D44 D45 S41 D121 D122 D123 S16 D46 D47 D48 S42 D124 D125 D126 S17 D49 D50 D51 S43 D127 D128 D129 S18 D52 D53 D54 S44 D130 D131 D132 S19 D55 D56 D57 S45 D133 D134 D135 output pin output pin To be continued HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 8 2002.03.04 Silan Semiconductors SC75823 (Continued) Segment COM3 COM2 COM1 S20 D58 D59 D60 S21 D61 D62 S22 D64 S23 Segment COM3 COM2 COM1 S46 D136 D137 D138 D63 S47 D139 D140 D141 D65 D66 S48 D142 D143 D144 D67 D68 D69 S49 D145 D146 D147 S24 D70 D71 D72 S50 D148 D149 D150 S25 D73 D74 D75 S51 D151 D152 D153 S26 D76 D77 D78 S52 D154 D155 D156 output pin output pin For example, the table below lists the segment output states for the S11 output pin. Display data Segment output pin (S11) state D31 D32 D33 0 0 0 The LCD segments corresponding to COM1 to COM3 are off. 0 0 1 The LCD segments corresponding to COM1 is on. 0 1 0 The LCD segments corresponding to COM2 is on. 0 1 1 The LCD segments corresponding toCOM1 and COM2 are on. 1 0 0 The LCD segments corresponding to COM3 is on. 1 0 1 The LCD segments corresponding to COM1 and COM3 are on. 1 1 0 The LCD segments corresponding to COM2 and COM3 are on. 1 1 1 The LCD segments corresponding to COM1 to COM3 are on INH and display control Since the LSI internal data (D1 to D156, DR, SC and BU) is undefined when power is first applied, the display is off (S1 to S52, COM1 to COM3= low) by setting the INH pin low at the same as power is applied. Then, meaningless display at the power-on can be prevented by transferring serial data from the controller while the display is off and setting INH pin high after the transfer completes.(see figure3). HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 9 2002.03.04 Silan Semiconductors SC75823 Figure 3 VDD R INH C VDD VIL INH t1 CE Internal data t2 Transfer of display and control data Undefined VIL Delined t1.......Determined by the value of C and R t2......10s(minimum) HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 10 2002.03.04 Silan Semiconductors SC75823 TIMING DIAGRAM 1/2 Bias , 1/3 Duty Drive Technique VDD VDD1, VDD2, (1/2 VDD) COM1 VSS VDD VDD1, VDD2 COM2 VSS VDD VDD1, VDD2 COM3 VSS VDD LCD driver output when all LCD segments corresponding to COM1, COM2, and COM3 are turnned off. VDD1, VDD2 VSS VDD LCD driver output when only LCD segments corresponding to COM1, are on. VDD1, VDD2 VSS VDD LCD driver output when only LCD segments corresponding to COM2, are on. VDD1, VDD2 VSS VDD LCD driver output when only LCD segments corresponding to COM1and COM2 are on. VDD1, VDD2 VSS VDD LCD driver output when only LCD segments corresponding to COM3 are on. VDD1, VDD2 VSS VDD LCD driver output when LCD segments corresponding to COM1 and COM3 are on. VDD1, VDD2 VSS VDD LCD driver output when LCD segments corresponding to COM2 and COM3 are on. VDD1, VDD2 VSS VDD LCD driver output when all LCD segments corresponding to COM1,COM2, and COM3 are on. VDD1, VDD2 VSS HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 11 2002.03.04 Silan Semiconductors SC75823 1/3 Bias, 1/3 Duty Drive Technique VDD VDD1 (2/3 VDD) VDD2 (1/3 VDD) COM1 VSS VDD VDD1 COM2 VDD2 VSS VDD VDD1 VDD2 COM3 VSS VDD LCD driver output when all LCD segments corresponding to COM1, COM2, and COM3 are turnned off. VDD1 VDD2 VSS VDD LCD driver output when only LCD segments corresponding to COM1, are on. VDD1 VDD2 VSS VDD VDD1 LCD driver output when only LCD segments corresponding to COM2, are on. VDD2 VSS VDD LCD driver output when LCD segments corresponding to COM1and COM2 are on. VDD1 VDD2 VSS VDD LCD driver output when only LCD segments corresponding to COM3 are on. VDD1 VDD2 VSS VDD LCD driver output when LCD segments corresponding to COM1 and COM3 are on. VDD1 VDD2 VSS VDD VDD1 LCD driver output when LCD segments corresponding to COM2 and COM3 are on. VDD2 VSS VDD LCD driver output when all LCD segments corresponding to COM1,COM2, and COM2 are on. VDD1 VDD2 VSS HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 12 2002.03.04 Silan Semiconductors SC75823 TEST CIRCUIT1 1/3 Bias (for use with small panels) VDD 56 VDD COM1 53 57 INH COM2 54 60 VSS OPEN COM3 55 58 VDD1 59 VDD2 S1 1 62 CE From the microcontroller 63 CL 64 DI LCD panel (up to 156 segments) 61 OSC S52 52 TEST CIRCUIT2 61 OSC VDD 56 VDD COM1 53 57 INH COM2 54 60 VSS COM3 55 58 VDD1 C0.047F C C 59 VDD2 S1 1 62 CE From the microcontroller 63 CL 64 DI LCD panel (up to 156 segments) 1/3 Bias (for use with normal size panels) S52 52 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 13 2002.03.04 Silan Semiconductors SC75823 TEST CIRCUIT3 61 OSC VDD R 56 VDD COM1 53 57 INH COM2 54 60 VSS COM3 55 58 VDD1 10KR1K C0.047F R C C R 59 VDD2 S1 1 62 CE From the microcontroller 63 CL 64 DI LCD panel (up to 156 segments) 1/3 Bias (for use with large panels) S52 52 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 14 2002.03.04 Silan Semiconductors SC75823 PACKAGE OUTLINE QFP-64-14 x 14-0.8 UNIT: mm 1.50B0.10 16.00B0.20 17 16 1.0 12.00 64 15.00 33 32 14.00B0.10 48 49 16.00B0.20 14.00B0.10 1 0.35B0.1 0.127B0.05 0.8 LQFP-64-10x10-0.5 UNIT: mm 1.50B0.10 12.00B0.20 17 16 1.0 7.50 64 11.00 33 32 10.0B0.2 48 49 13.6B0.4 10.00B0.10 1 0.20B0.05 0.127B0.05 0.5 HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 15 2002.03.04 Silan Semiconductors SC75823 Attach Revision History Data REV Description 2001.12.30 1.0 Original 2002.03.04 1.1 Modify the “SC7523” to “SC75823” Page HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD 16 Rev: 1.1 2002.03.04