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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 +85C 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) : : : : : : : : :
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Semiconductor
MSM6775
BLOCK DIAGRAM
SEG1
SEG80
BLANK
80-DOT SEGMENT DRIVER
80-CH DATA SELECTOR
80-BIT LATCH 5
80-BIT LATCH 4
80-BIT LATCH 3
80-BIT LATCH 2
80-BIT LATCH 1
LOAD
LATCH SELECTOR
80
DATA CLOCK
88-BIT SHIFT REGISTER
OSC-R OSC-C OSC-IN DSEL1 DSEL2 VDD VSS
OSC
TIMING GENERATOR
COMMON DRIVER
VLC1 VLC2 VLC3 COM1 COM2 COM3 COM4 COM5
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Semiconductor
MSM6775
PIN CONFIGURATION (TOP VIEW)
99 SEG49
98 SEG48
97 SEG47
96 SEG46
95 SEG45
94 SEG44
93 SEG43
92 SEG42
91 SEG41
90 SEG40
89 SEG39
88 SEG38
87 SEG37
86 SEG36
85 SEG35
84 SEG34
83 SEG33
82 SEG32
81 SEG31
80 SEG30
79 SEG29
78 SEG28
77 SEG27
SEG51 SEG52 SEG53 SEG54 SEG55 SEG56 SEG57 SEG58 SEG59
1 2 3 4 5 6 7 8 9
100 SEG50
76 SEG26 75 SEG25 74 SEG24 73 SEG23 72 SEG22 71 SEG21 70 SEG20 69 SEG19 68 SEG18 67 SEG17 66 SEG16 65 SEG15 64 SEG14 63 SEG13 62 SEG12 61 SEG11 60 SEG10 59 SEG9 58 SEG8 57 SEG7 56 SEG6 55 SEG5 54 SEG4 53 SEG3 52 SEG2 51 SEG1 COM1 50
SEG60 10 SEG61 11 SEG62 12 SEG63 13 SEG64 14 SEG65 15 SEG66 16 SEG67 17 SEG68 18 SEG69 19 SEG70 20 SEG71 21 SEG72 22 SEG73 23 SEG74 24 SEG75 25 SEG78 28 SEG79 29 SEG80 30 NC 31 VDD 32 LOAD 33 CLOCK 34 DATA 35 BLANK 36 DSEL2 37 DSEL1 38 OSC-R 39 OSC-C 40 OSC-IN 41 VSS 42 VLC3 43 VLC2 44 VLC1 45 COM5 46 COM4 47 COM3 48 SEG77 27 COM2 49 26 SEG76
NC : No connection 100-Pin Plastic TQFP
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Semiconductor
MSM6775
PIN DESCRIPTIONS
Symbol OSC-IN OSC-C OSC-R DATA CLOCK LOAD BLANK DSEL1 DSEL2 Type I O O I I I I I 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 L L H DSEL1 L H X X: Don't care COM1 to COM5 SEG1 to SEG80 VLC1 VLC2 VLC3 VDD VSS -- -- O Display output pins for LCD. These pins are connected to the COMMON side on the LCD panel. Display output pins for LCD. These pins are connected to the SEGMENT side on the O 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>VLC1VLC2>VLC3 Supply voltage pin and ground pin. Duty selected 1/3 1/4 1/5
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Semiconductor
MSM6775
ABSOLUTE MAXIMUM RATINGS
Parameter Supply Voltage Input Voltage Storage Temperature Symbol VDD VI TSTG Condition Ta=25C Ta=25C -- Rating -0.3 to +6.0 -0.3 to VDD+0.3 -55 to +150 Unit V V C
RECOMMENDED OPERATING CONDITIONS
Parameter Supply Voltage LCD Driving Voltage Operating Temperature Symbol Condition VDD VDD - VLC3 Top -- -- -- Range 2.7 to 5.5 3.5 to 5.5 -40 to +85 Unit V V C Applicable pin VDD VDD, VLC1, VLC2, VLC3 --
Oscillator Circuit
Parameter Oscillation Resistance Oscillation Capacitance Current Limiting Resistance COMMON Signal Frequency Symbol Condition R0 C0 R1 fCOM -- -- -- -- Min 20 0.00047 62 25 Max 120 0.01 360 250 Unit kW mF kW Hz Applicable pin OSC-R OSC-C OSC-IN COM1 to COM5
Note: See Section, "Reference Data," for the resistor and capacitor values in the table. RC Values in Oscillator Circuit
Parameter Oscillation Resistance Oscillation Capacitance Current Limiting Resistance Symbol R0 C0 R1 1/3 duty 68 0.001 220 1/4 duty 1/5 duty 51 0.001 160 43 0.001 130 Unit kW mF kW Applicable pin OSC-R OSC-C OSC-IN
Example of an oscillator circuit
MSM6775 R0 OSC-R
C0
OSC-C
R1
OSC-IN
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Semiconductor
MSM6775
ELECTRICAL CHARACTERISTICS
DC Characteristics
(VDD=2.7 to 5.5V, Ta=-40 to +85C) Parameter "H" Input Voltage 1 "L" Input Voltage 1 "H" Input Voltage 2 "L" Input Voltage 2 "H" Input Current "L" Input Current COMMON Output Voltage Symbol VIH1 VIL1 VIH2 VIL2 VIH VIL VOC0 VOC1 VOC2 VOC3 VOS0 Segment Output Voltage Supply Current VOS1 VOS2 VOS3 IDD VDD=5.0V, no load VDD=4.0V *5 VDD=4.0V *4 VDD=5.5V, VI=VDD VDD=5.5V, VI=0V IO=-100mA IO=100mA IO=100mA IO=+100mA IO=-10mA IO=10mA IO=10mA IO=+10mA *6 *7 *8 *9 *6 *7 *8 Condition *1 *1 *2 *2 *3 *3 Min 0.85VDD VSS 0.8VDD VSS -- -- VDD-1 VLC1-1 VLC2-1 -- VDD-1 VLC1-1 VLC2-1 -- -- Max VDD 0.15VDD VDD 0.2VDD 10 -10 -- VLC1+1 VLC2+1 VLC3+1 -- VLC1+1 VLC2+1 VLC3-1 0.5 Unit V V V V mA mA V V V V V V V V mA
*1 *2 *3 *4 *5 *6 *7 *8 *9
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
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Semiconductor
MSM6775
AC Characteristics
(VDD=2.7 to 5.5V, Ta=-40 to +85C) Parameter Clock Frequency Clock "H" Time Clock "L" Time Data Set-up Time Data Hold Time Load "H" Time Clock-to-load Time Load-to-clock Time Rise time, Fall Time OSC-IN Input Frequency OSC-IN "H" Time OSC-IN "L" Time Rise Time, Fall Time Symbol fCP tWHC tWLC tDS tDH tWHL tCL tLC tr1, tf1 fOSC tWHO tWLO tr2, tf2 Condition -- -- -- -- -- -- -- -- -- -- -- -- -- Min -- 70 70 50 50 100 100 100 -- -- 20 20 -- Max 4.0 -- -- -- -- -- -- -- 50 20 -- -- 100 Unit MHZ ns ns ns ns ns ns ns ns kHZ ms ms ns OSC-IN DATA CLOCK LOAD CLOCK LOAD CLOCK CLOCK Applicable pin
DATA
VIH2 VIL2 tDS tr1 tWLC
VIH2 VIL2 tDH tf1 VIH1 VIL1 tWHL tCL VIH2 VIH2 VIL2 1/fOSC tr2 tWHO VIH1 VIH1 VIL1 tf2 VIL2 VIL1
tWHC VIH1
CLOCK VIL1 VIL1 1/fCP
tLC
LOAD
OSC-IN VIL1 VIL1 tWLO
(VIH1=0.85VDD (VIH2=0.8VDD
VIL1=0.15VDD) VIL2=0.2VDD )
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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 DATA 1 CLOCK 80 81 82 83 84 85 86 87 88 D80 DM1 DM2 DM3 C1 C2 C3 C4 C5
LOAD Data in display latch Old data New data
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Semiconductor Data Structure Input data
End bit Corresponds to SEG1
MSM6775
First bit Corresponds to SEG80
C5
C4
C3 Select bit (5 bits)
C2
C1
DM3 DM2 DM1 Dummy bit (3 bits)
D80
D79
D5
D4
D3
D2
D1
LCD display data (80 bits)
Correspondence between select bits and COM1 to COM5
C5 0 0 0 0 1 C4 0 0 0 1 0 C3 0 0 1 0 0 C2 0 1 0 0 0 C1 1 0 0 0 0 Description Display data corresponding to COM1 Display data corresponding to COM2 Display data corresponding to COM3 Display data corresponding to COM4 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.
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Semiconductor
MSM6775
APPLICATION CIRCUITS
(For 1/4 duty)
1/4 DUTY 320-SEGMENT LCD PANEL
CPU P O R T R1 OSC-IN C0 OSC-C R0 OSC-R DSEL1 DSEL2 VSS +5V DATA CLOCK LOAD BLANK VDD
SEG1
SEG80 COM1 COM2 COM3 COM4 COM5 MSM6775
Open
VLC1 VLC2 VLC3
BIAS CIRCUIT
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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 0.6 0.5
IDD [mA]
Ta=25C R0=51kW R1=160kW C0=0.001mF 1/4 duty
0.4 0.3 0.2 0.1 0 2 3 4 VDD [V] 5 6 7
COMMON Frame Frequency vs. VDD (The resistor and capacitor values used are their recommended values.) 120 Ta=25C 1/3 duty 1/4 duty 1/5 duty
Frame Frequency [Hz]
110
100
90
80 2 3 4 VDD [V] 5 6 7
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Semiconductor
MSM6775
Oscillation Frequency vs. R0 (VDD=3V) 105
Frequency [Hz]
104
C0=0.00047mF C0=0.001mF C0=0.0022mF C0=0.0047mF
1000 R1 ~ 3R0 ~ Ta=25C 100 20 30 40 50 R0 [kW] 60 70 80 90 100
Oscillation Frequency vs. R0 (VDD=5V) 105
Frequency [Hz]
104
C0=0.00047mF C0=0.001mF C0=0.0022mF C0=0.0047mF
1000 R1 ~ 3R0 ~ Ta=25C 100 20 30 40 50 R0 [kW] 60 70 80 90 100
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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).
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