E2B0012-27-Y2 ¡ Semiconductor MSM6775 ¡ Semiconductor This version: Nov. 1997 MSM6775 Previous version: Mar. 1996 1/3, 1/4, 1/5 DUTY LCD DRIVER WITH 5-DOT COMMON DRIVER AND 80-DOT SEGMENT DRIVER GENERAL DESCRIPTION The MSM6775 is an LCD driver for dynamic display providing 3-duty-switchable pins (1/3, 1/ 4 and 1/5 duty). It can directly drive LCDs of up to 400, 320 and 240 segments when 1/5, 1/4 and 1/3 duty are selected, respectively. FEATURES • Operating range Supply voltage (VDD) Operating temperature (Top) LCD driving voltage (VDD-VLC3) • Segment output 1/5 duty 1/4 duty 1/3 duty • Serial transfer clock frequency • Serial interface with CPU : : : : : : : : : 2.7 to 5.5V –40 to +85°C 3.5 to 5.5V 80 pins Up to 400 segments can be displayed. Up to 320 segments can be displayed. Up to 240 segments can be displayed. 4MHz Through three input pins (DATA, LOAD, and CLOCK) • One-to-one corresponcence between input data and its output When input data is at "H" level : Display goes on. When input data is at "L" level : Display goes off. • Built-in oscillator circuit for COMMON signals • The entire display can be turned off. (BLANK pin) • Package: 100-pin plastic TQFP (TQFP100-P-1414-0.50-K) (Product name : MSM6775TS-K) 1/13 ¡ Semiconductor MSM6775 BLOCK DIAGRAM SEG1 SEG80 BLANK 80-DOT SEGMENT DRIVER 80-CH DATA SELECTOR 80-BIT LATCH 5 LOAD DSEL2 VDD VSS 80-BIT LATCH 2 80-BIT LATCH 1 80 88-BIT SHIFT REGISTER CLOCK DSEL1 80-BIT LATCH 3 LATCH SELECTOR DATA OSC–R OSC–C OSC–IN 80-BIT LATCH 4 OSC TIMING GENERATOR COMMON DRIVER VLC1 VLC2 VLC3 COM1 COM2 COM3 COM4 COM5 2/13 ¡ Semiconductor MSM6775 76 SEG26 77 SEG27 78 SEG28 79 SEG29 80 SEG30 81 SEG31 82 SEG32 83 SEG33 84 SEG34 85 SEG35 86 SEG36 87 SEG37 88 SEG38 89 SEG39 90 SEG40 91 SEG41 92 SEG42 93 SEG43 94 SEG44 95 SEG45 96 SEG46 97 SEG47 98 SEG48 99 SEG49 100 SEG50 PIN CONFIGURATION (TOP VIEW) 59 SEG9 SEG68 18 58 SEG8 SEG69 19 57 SEG7 SEG70 20 56 SEG6 SEG71 21 55 SEG5 SEG72 22 54 SEG4 SEG73 23 53 SEG3 SEG74 24 52 SEG2 SEG75 25 51 SEG1 SEG76 COM1 50 60 SEG10 SEG67 17 COM2 49 61 SEG11 SEG66 16 COM3 48 62 SEG12 SEG65 15 COM4 47 63 SEG13 SEG64 14 COM5 46 64 SEG14 SEG63 13 VLC1 45 65 SEG15 SEG62 12 VLC2 44 66 SEG16 SEG61 11 VLC3 43 67 SEG17 SEG60 10 VSS 42 9 OSC-IN 41 68 SEG18 SEG59 OSC-C 40 8 OSC-R 39 69 SEG19 SEG58 DSEL1 38 7 DSEL2 37 70 SEG20 SEG57 BLANK 36 6 DATA 35 71 SEG21 SEG56 CLOCK 34 5 LOAD 33 72 SEG22 SEG55 VDD 32 4 NC 31 73 SEG23 SEG54 SEG80 30 3 SEG79 29 74 SEG24 SEG53 SEG78 28 75 SEG25 2 26 1 SEG52 SEG77 27 SEG51 NC : No connection 100-Pin Plastic TQFP 3/13 ¡ Semiconductor MSM6775 PIN DESCRIPTIONS Symbol Type OSC-IN I OSC-C O OSC-R O DATA I CLOCK I LOAD I BLANK I DSEL1 I DSEL2 I Description Pins for oscillation. The oscillator circuit is configured by externally connecting two resistors and a capacitor. Make the wiring length as short as possible, because the resistor connected to the OSC-IN pin has a higher value and the circuit is susceptible to external noise. Serial data input pin. The display goes on when input data is at "H" level, and it goes off when input data is at "L" level. Shift clock input pin. Data from the DATA pin is transferred in synchronization with the rising edge of the shift clock. (Built-in Schmitt circuit is used.) Load signal input pin. Serially input data is transferred to the 80-bit latch at "H" level of this load signal, then held at "L" level. Input pin that turns off all segments. The entire display goes off when "L" level is applied to this pin. The display returns to the previous state when "H" level is applied. Input pins to select 1/3, 1/4, or 1/5 duty. Following shows how each duty is selected. DSEL2 DSEL1 Duty selected L L 1/3 L H 1/4 X 1/5 H X: Don't care COM1 to COM5 SEG1 to SEG80 O O VSS LCD panel. For the correspondence between the output of these pins and input data, see Section, "Data Structure". Bias pins for LCD drive. Through these pins, bias voltages for the LCD — are externally supplied. The bias potential must meet the following condition: VDD>VLC1≥VLC2>VLC3 VLC3 VDD LCD panel. Display output pins for LCD. These pins are connected to the SEGMENT side on the VLC1 VLC2 Display output pins for LCD. These pins are connected to the COMMON side on the — Supply voltage pin and ground pin. 4/13 ¡ Semiconductor MSM6775 ABSOLUTE MAXIMUM RATINGS Parameter Condition Rating Unit Supply Voltage Symbol VDD Ta=25°C –0.3 to +6.0 V Input Voltage VI Ta=25°C –0.3 to VDD+0.3 V Storage Temperature TSTG –55 to +150 °C — RECOMMENDED OPERATING CONDITIONS Parameter Symbol Condition Unit Applicable pin VDD — 2.7 to 5.5 V VDD VDD – VLC3 — 3.5 to 5.5 V VDD, VLC1, VLC2, VLC3 Top — –40 to +85 °C — Supply Voltage LCD Driving Voltage Range Operating Temperature Oscillator Circuit Min Max Unit Applicable pin Oscillation Resistance Parameter Symbol Condition R0 — 20 120 kW OSC-R Oscillation Capacitance C0 — 0.00047 0.01 mF OSC-C Current Limiting Resistance R1 — 62 360 kW OSC-IN COMMON Signal Frequency fCOM — 25 250 Hz COM1 to COM5 Note: See Section, "Reference Data," for the resistor and capacitor values in the table. RC Values in Oscillator Circuit Parameter Symbol 1/3 duty 1/4 duty 1/5 duty Unit Applicable pin Oscillation Resistance R0 68 51 43 kW OSC-R Oscillation Capacitance C0 0.001 0.001 0.001 mF OSC-C Current Limiting Resistance R1 220 160 130 kW OSC-IN Example of an oscillator circuit MSM6775 R0 OSC-R C0 OSC-C R1 OSC-IN 5/13 ¡ Semiconductor MSM6775 ELECTRICAL CHARACTERISTICS DC Characteristics (VDD=2.7 to 5.5V, Ta=–40 to +85°C) Parameter Symbol Condition Min Max Unit "H" Input Voltage 1 VIH1 *1 0.85VDD VDD V "L" Input Voltage 1 VIL1 *1 VSS 0.15VDD V "H" Input Voltage 2 VIH2 *2 0.8VDD VDD V "L" Input Voltage 2 VIL2 *2 VSS 0.2VDD V "H" Input Current VIH VDD=5.5V, VI=VDD *3 — 10 mA "L" Input Current VIL VDD=5.5V, VI=0V — –10 mA VDD–1 — V *3 IO=–100mA VOC0 COMMON VOC1 IO=±100mA *6 VLC1–1 VLC1+1 V Output Voltage VOC2 VDD=4.0V IO=±100mA *7 VLC2–1 VLC2+1 V VOC3 IO=+100mA *8 — VLC3+1 V VOS0 IO=–10mA VDD–1 — V Segment VOS1 IO=±10mA *6 VLC1–1 VLC1+1 V Output Voltage VOS2 IO=±10mA *7 VLC2–1 VLC2+1 V VOS3 IO=+10mA *8 — VLC3–1 V *9 — 0.5 mA Supply Current *1 *2 *3 *4 *5 *6 *7 *8 *9 IDD VDD=4.0V *4 *5 VDD=5.0V, no load Applies to the CLOCK and OSC-IN. Applies to all input pins excluding the CLOCK and OSC-IN. Applies to all input pins. Applies to COM1 to COM5. Applies to SEG1 to SEG80. VLC1=3.0V VLC2=2.0V VLC3=1.0V R0=51kW R1=160kW C0=0.001mF 6/13 ¡ Semiconductor MSM6775 AC Characteristics (VDD=2.7 to 5.5V, Ta=–40 to +85°C) Parameter Symbol Condition Min Max Unit Clock Frequency fCP — — 4.0 MHZ Clock "H" Time tWHC — 70 — ns Applicable pin CLOCK Clock "L" Time tWLC — 70 — ns Data Set-up Time tDS — 50 — ns DATA Data Hold Time tDH — 50 — ns CLOCK Load "H" Time tWHL — 100 — ns LOAD Clock-to-load Time tCL — 100 — ns CLOCK Load-to-clock Time tLC — 100 — ns LOAD Rise time, Fall Time tr1, tf1 — — 50 ns CLOCK OSC-IN Input Frequency fOSC — — 20 kHZ OSC-IN "H" Time tWHO — 20 — ms OSC-IN "L" Time tWLO — 20 — ms Rise Time, Fall Time tr2, tf2 — — 100 ns DATA VIH2 VIH2 VIL2 VIL2 tDS OSC-IN tDH tr1 tWLC VIH1 CLOCK VIL1 tf1 tWHC VIH1 VIL1 VIL1 1/fCP VIL1 tWHL tLC tCL VIH2 VIH2 LOAD VIL2 VIL2 1/fOSC tr2 tWHO VIH1 OSC-IN VIL1 VIL1 tf2 VIH1 VIL1 tWLO (VIH1=0.85VDD (VIH2=0.8VDD VIL1=0.15VDD) VIL2=0.2VDD ) 7/13 ¡ Semiconductor MSM6775 FUNCTIONAL DESCRIPTION Operation As shown in "Data Structure" (next section), the display data consists of the data field corresponding to the output for turning the segments on or off and the select field that selects the input block of data. Data input to the DATA pin is loaded into the 88-bit shift register at the rising edge of the CLOCK signal, transferred to the 80-bit latch while the load signal is at "H" level, and then output via the 80-dot segment driver. D1 D80 1 80 DM1 DM2 DM3 C1 C2 C3 C4 C5 84 85 86 87 88 DATA 81 82 83 CLOCK LOAD Data in display latch Old data New data 8/13 ¡ Semiconductor MSM6775 Data Structure Input data End bit C5 First bit Corresponds to SEG80 Corresponds to SEG1 C4 C3 C2 C1 DM3 DM2 DM1 Select bit (5 bits) D80 D79 Dummy bit (3 bits) D5 D4 D3 D2 D1 LCD display data (80 bits) Correspondence between select bits and COM1 to COM5 C5 C4 C3 C2 C1 Description 0 0 0 0 1 Display data corresponding to COM1 0 0 0 1 0 Display data corresponding to COM2 0 0 1 0 0 Display data corresponding to COM3 0 1 0 0 0 Display data corresponding to COM4 1 0 0 0 0 Display data corresponding to COM5 Notes: 1. Arbitrary data can be set for the dummy bits. 2. Select bits C1 to C5 select 80-bit latches that correspond to COM1 to COM5, respectively. Therefore, if "1" is set for more than one select bit, data is set to all the corresponding 80-bit latches. Example: If "1" is set to all the select bits C1 to C5, the display data of D1 to D80 is set to all the 80-bit latches that correspond to COM1 to COM5. 9/13 ¡ Semiconductor MSM6775 APPLICATION CIRCUITS (For 1/4 duty) 1/4 DUTY 320-SEGMENT LCD PANEL CPU DATA CLOCK LOAD BLANK VDD P O R T SEG1 SEG80 COM1 COM2 COM3 COM4 COM5 Open R1 OSC-IN C0 MSM6775 OSC-C R0 OSC-R DSEL1 DSEL2 VSS VLC1 VLC2 VLC3 +5V BIAS CIRCUIT 10/13 ¡ Semiconductor MSM6775 REFERENCE DATA The data shown in this section is for reference (a metal film resistor and a film capacitor are used). Resistor and capacitor values must be determined based on experiments. Use the following expression to convert oscillation frequency to COMMON frame frequency (or vice versa): fCOM=fOSC ¥ Duty/16 fCOM : COMMON frame frequency fOSC : Oscillation frequency Duty : e.g., 1/4 for 1/4 duty For example, if fCOM=100Hz at 1/5 duty, the oscillation frequency is fOSC=8000Hz. IDD vs. VDD 0.7 Ta=25°C R0=51kW R1=160kW C0=0.001mF 1/4 duty 0.6 IDD [mA] 0.5 0.4 0.3 0.2 0.1 0 2 3 4 5 6 7 VDD [V] COMMON Frame Frequency vs. VDD (The resistor and capacitor values used are their recommended values.) Frame Frequency [Hz] 120 Ta=25°C 1/3 duty 1/4 duty 1/5 duty 110 100 90 80 2 3 4 5 6 7 VDD [V] 11/13 ¡ Semiconductor MSM6775 Oscillation Frequency vs. R0 (VDD=3V) Frequency [Hz] 105 104 C0=0.00047mF C0=0.001mF C0=0.0022mF C0=0.0047mF 1000 R1 ~~ 3R0 Ta=25°C 100 20 30 40 50 R0 [kW] 60 70 80 90 100 Oscillation Frequency vs. R0 (VDD=5V) Frequency [Hz] 105 104 C0=0.00047mF C0=0.001mF C0=0.0022mF C0=0.0047mF 1000 R1 ~~ 3R0 Ta=25°C 100 20 30 40 50 R0 [kW] 60 70 80 90 100 12/13 ¡ Semiconductor MSM6775 PACKAGE DIMENSIONS (Unit : mm) TQFP100-P-1414-0.50-K Mirror finish Package material Lead frame material Pin treatment Solder plate thickness Package weight (g) Epoxy resin 42 alloy Solder plating 5 mm or more 0.55 TYP. Notes for Mounting the Surface Mount Type Package The SOP, QFP, TSOP, SOJ, QFJ (PLCC), SHP and BGA are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed in storage. Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). 13/13