Semiconductor MSC1215-xx This version: Nov. 1997 MSC1215-xx Previ

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

Semiconductor MSC1215-xx This version: Nov. 1997 MSC1215-xx Previ

Datasheet Thumbnail

Top Searches for this datasheet

E2C0022-27-Y3 Semiconductor
Semiconductor MSC1215-xx
This version: Nov. 1997 MSC1215-xx Previous version: Jul. 1996
Duplex Driver with Dimming, Keyscan Converter Function
GENERAL DESCRIPTION
MSC1215-xx 1/2-duty vacuum fluorescent display tube driver implemented BiCMOS technology. This consists 37-bit shift register, latches, analog dimming circuit, conversion circuit), keyscan circuit, 6ch-6-bit converter segment drivers, 2-grid pre-drivers. MSC1215-xx capabilities displaying audio system frequencies various informations tube automobile application also interfacing with keyboard inputs analog volume input. automobile audio systems, front panel functions (such frequency display, keyboard input analog voltage input from volume) accomplished this analog dimming/PWM conversion modes selected automatically brightness control, this applicable type automobile without change specifications. interface with done only with wires (CS, DATA CLOCK signals). Also, DATA CLOCK signal lines shared with other peripherals because chip select function signal.
FEATURES
Power supply voltage VDD=8 Operating temperature range Ta=-40 +85°C) 17-segment driver outputs (IOH=-5mA VOH=VDD-0.8 Built-in analog dimming circuit (6-bit resolution, user-programmable) Built-in conversion circuit (Lamp signal vacuum fluorescent display signal) Built-in automatic-selection circuit analog dimming/PWM conversion function Built-in 6-bit converter Built-in Keyscan circuit Built-in oscillation circuit (external fOSC=3.3 MHz) Built-in Power-On-Reset circuit Package: 42-pin plastic (DIP 42-P-600-2.54) (Product name: MSM1215-xxRS) indicates code number.
1/22
Semiconductor
MSC1215-xx
BLOCK DIAGRAM
SEG1 Regulator Segment Control PWMOUT DATA CLOCK OSC0 OSC1
Decoder De-glitch detector Look table 6-bit dig. comp. 34-18 (Grid2) 17-1 (Grid1) 3-bit Latch
SEG17
Segment Tube Driver
Test
Test1-8
Data) (Keyscan) (A/D)
Timing
34-bit Latch
bit1 bit34 34-bit Shift Register
Mode Select
3-bit
Timing Generator
Grid Pre-driver
GRID1 GRID2
Latch Select
Logarithm Counter
12-bit Presetable
Read Eable Channel Select
Timing Generator
4-bit Latch
VREF VREF
36-bit
Read Enable "H"at
Timing Generator
Detector
6-bit Logic
With 100kW pull-up resistor
2/22
Semiconductor
MSC1215-xx
INPUT OUTPUT CONFIGURATION
Schematic Diagrams Logic Portion Input Circuit
Reg.)
INPUT
Schematic Diagrams Logic Portion Input Schematic Diagrams Logic Portion Input/ Circuit Output Circuit
Reg.)
Reg.)
Reg.)
COLn
DATAI/O
Schematic Diagrams Logic Portion Output Schematic Diagrams Driver Output Circuit Circuit
Reg.) Reg.)
OUTPUT
OUTPUT
3/22
Semiconductor
MSC1215-xx
CONFIGURATION (TOP VIEW)
COL4 GRID1 GRID2 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17
COL3 COL2 COL1 VREF OSC0 OSC1 DATA CLOCK
42-Pin Plastic
4/22
Semiconductor
MSC1215-xx
ABSOLUTE MAXIMUM RATINGS
Parameter Supply Voltage Input Voltage Input Voltage Power Dissipation Storage Temperature Symbol VIN1 VIN2 TSTG Condition inputs except Ta=85°C Rating -0.3 -0.3 -0.3 +VDD +150 Unit
RECOMMENDED OPERATING CONDITION
Parameter Supply Voltage Operating Temperature High Level Input Voltage High Level Input Voltage Level Input Voltage Clock Frequency Frequency Frame Frequency Symbol VIH1 VIH2 fosc Condition inputs except inputs R=4.7 C=10 Min. Typ. 3.33 Max. Unit
5/22
Semiconductor
MSC1215-xx
ELECTRICAL CHARACTERISTICS
Characteristics
(Ta=-40 +85°C, VDD=8 18V) Parameter Input Voltage Input Voltage Input Current Input Current Input Current Input Current Output Voltage Output Voltage Symbol IIH1 IIH2 IIL1 IIL2 VOH1 VOH2 Condition inputs except inputs except inputs except COL1-4 VIN=4.4 COL1-4, VIN=3.8 inputs except COL1-4 VIN=0 COL1-4, VIN=0 SEG, GRID IOH1=-5 VDD=9.5 DATA I/O, VDD=9.5 IOH2=-200 Output open SEG,GRID, VDD=9.5 IOL1=500 IOL1=200 IOL1=2 DATA I/O, ROW1-3 VDD=9.5 IOL2=200 fosc=3.3 MHz, load Min. -160 VDD-0.8 Max. Unit
Output Voltage
VOL1
Output Voltage Current Consumption
VOL2
6/22
Semiconductor Switching Characteristics
MSC1215-xx
(Ta=-40 +85°C, VDD=8 Parameter Oscillation Frequency Clock Frequency Clock Pulse Width Data Set-up Time Data Hold Time Pulse Width Time Pulse Width Time Set-up Time CS-clock Time Hold Time Clock-CS Time DATA Output Delay CLCOK-DATA Time GRID Outputs Delay Time from Slew Rate (All Drivers) Symbol fosc tCSW tCSL tRCSW tRCSL tCSS tCSH tODS Condition Except reset mode Except reset mode Reset mode Reset mode CL=100 CL=100 t=20% Min. Max. Unit
Power Timing
tPCS
7/22
Semiconductor Analog Dimming Characteristics
MSC1215-xx
(Ta=-40 +85°C, VDD=8 18V) Parameter Ouput Voltage Error Reference Voltage Accuracy Condition Min. Typ. Max. Unit
Reference voltage typical. Converter Characteristics
(Ta=-40 +85°C, VDD=8 Parameter Conversion Accuracy Reference Voltage (VREF) Output Current Input Voltage Range Conversion Time/Channel Condition fOSC=3.3MHz Min. Typ. Max. VREF Unit
When loads connected parallel. Keyscan Characteristics
(Ta=-40 +85°C, VDD=8 Parameter Keyscan Cycle Time Keyscan Pulse Width Condition fOSC=3.3MHz fOSC=3.3MHz Min. Typ. Max. Unit
Conversion Characteristics
(Ta=-40 +85°C, VDD=8 Parameter Input Frequency Rise/Fall Time Pulse Width Input Duty Cycle Input Threshold voltage Input Threshold voltage Hysteresis Width Condition Min. 1.65 0.26VDD 0.20VDD 0.02VDD Typ. 0.28VDD 0.22VDD 0.06VDD Max. 98.3 0.30VDD 0.24VDD 0.10VDD Unit
8/22
Semiconductor
MSC1215-xx
TIMING DIAGRAM
tCSW tCSS CLOCK DATA (INPUT) VALID VALID tCSH tCSL
Figure DATA Input Timing
tCSS tCSH
CLOCK
DATA (OUTPUT)
Figure DATA Outpout Timing
9/22
Semiconductor
MSC1215-xx
tPCS tRCSW tRCSL
Figure Power-on-Reset Timing
tCSW tODS SEG1-17 GRID1, tODS
Figure GRID Output Timing
Frame Cycle 4096-bit times GRID1 16-bit times GRID2 2032-bit times
6-bit times SEG1-17 2038-bit times 10-bit times
Figure SEG-GRID output Timing (Daylight Mode) Note: Timing shown analog dimming with duty cycle 2032/2048 VK="L". 1-bit time=TOSC (=4/fOSC)=1.2 typical.
10/22
Semiconductor
MSC1215-xx
Frame Cycle 4096-bit times GRID1
2048-bit times GRID2 208-bit times max.
SEG1-17
Figure SEG-GRID output Timing (Dark Mode) Note: Timing shown analog dimming with duty cycle 208/2048 VK="H". 1-bit time=TOSC (=4/fOSC)=1.2 typical.
(PWM Input)
Figure Waveform
Keyscan Cycle Time ROW1 Keyscan Pulse Width ROW2
ROW3
Figure Keyscan Timing Note: scanning from ROW1 ROW3 started when pushed down released. Scanning will stop when turns from "H", after times pulses transfer display data.
11/22
Semiconductor
MSC1215-xx
Push Keyscan Keyscan Stop
Display Data Output
Figure Keyscan Stop Timing
FUNCTIONAL DESCRIPTION
Functional Description Power supply input Connected power supply Ground This level. CLOCK Serial clock input Chip select input When input this pin, interfacing with available through CLOCK DATA pins. Therefore, signal lines CLOCK DATA shared with other peripherals. DATA (Input-output) Serial data input-output This inputs display data outputs keyscan conversion data. Daylight/dark mode selection input When input, dark mode selected output duty cycle determined analog data input into pin. When input, daylight mode selected output duty cycle becomes about 100%. Analog/PWM dimming data input Analog/PWM dimming mode selection will done internal detection circuit automatically. VREF Reference voltage output converter 12/22
Semiconductor
MSC1215-xx
CH1-6 Analog voltage input converter COL1-4 matrix input pins These pins active "Low" pulled through built-in resistors except when input pushed down key. ROW1-3 matrix scanning output Normally ROW1-3 output "L", detecting switch pushed down released, scan starts, sending pulses times data, after above turning from "H". After scan stops, outputs turn "L". OSC0, oscillation input pins resistor capacitor connected these pins. (See figure below)
OSC1 OSC0
SEG1-17 Segment output pins GRID1, Grid output pins Output inverted signal grid signal. These pins connected inputs external drivers (such transistor).
13/22
Semiconductor Functional Flowchart
MSC1215-xx
POWER-ON (Power-on Reset)
Display Data Input Mode Pulses CS="H" Dispaly Data Input bits) Test Data Input bits) Input Total bits)
CS="L"
Keyscan Data Output Mode
CS="H"
Keyscan Data Output bits)
CS="L"
Data Output Mode
CS="H"
Data Output Bit)
CS="L"
Note: When power supply turns internal circuits initialized follows built-in power-on reset circuit. Display data input mode selected segment outputs state ("L") internal registers latches level status internal circuit after serial pulses were applied, follows. Display data input mode selected other status same before serial pulses were applied.
14/22
Semiconductor Display Data Input
MSC1215-xx
Data input available only when applied "CS" pin. Input data shifted into shift registers through "DATA I/O" rising edge clock. data automatically loaded latches falling edge "CS" signal. [Data Format]
Data Display Data Test Data First
Note: Three bits test data used shipping inspection. normal operation mode, these bits should level. Keyscan Data Output Data output available only when applied "CS" pin. When keyscan data output mode selected, "DATA I/O" changed output mode. Then, bits keyscan data come from "DATA I/O" synchronizing with rising edge clock. This output mode changed data output mode falling edge input signal. select directly display input mode from this output mode, serial pulses should input pin. [Data Format]
Data First
Note: Symbols keyscan data follows.
Number (COL1-4) Number (ROW1-3)
Data Output data output available only when input pin. When data output mode selected, DATA changed output mode. Then bits data come from DATA synchronizing with rising edge shift clock. This output mode changed display input mode falling edge input signal. [Data Format]
Data 36-31 MSB-LSB 30-25 MSB-LSB 24-19 MSB-LSB 18-13 MSB-LSB 12-7 MSB-LSB MSB-LSB First
15/22
Semiconductor Keyscan
MSC1215-xx
keep scanning noise minimum, scanning switch starts only when pushed down released. scanning stops when input turns from after sending pulses times display data. [Key Matrix Input Output]
ROW1 ROW2 ROW3 COL1 COL2 COL3 COL4
Conversion built-in 6-ch 6-bit converter. shown circuit below, VREF output connected variable resistor forming voltage divider divided analog voltage used input into pins. [Circuit Example]
VREF Variable Resistor
Dimming Lamp signal input converted display signal conversion circuit. conversion table mark-programmable. Note: duty cycle lamp signal measured with reference point threshold voltage input pin. threshold voltage changes process parameter deviation. Therefore, conversion error increases rise/fall time lamp increases.
16/22
Semiconductor Analog Dimming
MSC1215-xx
duty cycle controlled analog voltage which output brightness control volume dashboard. dimming curve mask-programmable with following limitations; Maximum duty cycle 12.5%.
12.5% 12.5% 100% (DUTY) 512kHz DUTY CYCLE STEP
Number pulse stops max. Input Voltage "VD" input voltage "VD" needs voltage divider shown below.
VD-IN
Note: maximum voltage Maximum Threshold Voltage maximum threshold voltage 5.0V. Minimum Maximum VDIM Input Voltage minimum threshold voltage step 20mV. Only first step, threshold voltage value between 20mV
20mV
17/22
Semiconductor Conversion Table
LAMP LAMP STEP DUTY CYCLE DUTY CYCLE STEP DUTY CYCLE DUTY CYCLE 100.00% 12.50% 58.75% 98.75% 97.50% 96.25% 95.00% 93.75% 92.50% 91.25% 90.00% 88.75% 87.50% 86.25% 85.00% 83.75% 82.50% 81.25% 80.00% 78.75% 77.50% 76.25% 75.00% 73.75% 72.50% 71.25% 70.00% 68.75% 67.50% 66.25% 65.00% 63.75% 62.50% 61.25% 60.00% 57.50% 56.25% 55.00% 53.75% 52.50% 51.25% 50.00% 48.75% 47.50% 46.25% 45.00% 43.75% 42.50% 41.25% 40.00% 38.75% 37.50% 36.25% 35.00% 33.75% 32.50% 31.25% 30.00% 28.75% 27.50% 26.25% 25.00% 23.75% 22.50% 21.25% 20.00%
MSC1215-xx
18/22
Semiconductor Dimming Voltage-Pulse width Correspondence Table
MSC1215-xx
Threshold dimming voltage duty cycle (Typical Value) 12.5% maximum table
Pulse Step Number Duty Cycle Pulse Count 256/2048 240/2048 224/2048 208/2048 192/2048 184/2048 176/2048 168/2048 160/2048 152/2048 144/2048 136/2048 128/2048 120/2048 112/2048 104/2048 96/2048 92/2048 88/2048 84/2048 80/2048 76/2048 72/2048 68/2048 64/2048 60/2048 12.5 11.7 10.9 10.2 9.38 8.98 8.59 8.20 7.81 7.42 7.03 6.64 6.25 5.86 5.47 5.08 4.69 4.49 4.30 4.10 3.91 3.71 3.52 3.32 3.13 2.93 Threshold Pulse Step Duty Cycle Voltage Number Pulse Count 56/2048 52/2048 48/2048 46/2048 44/2048 42/2048 40/2048 38/2048 36/2048 34/2048 32/2048 30/2048 28/2048 26/2048 24/2048 23/2048 22/2048 21/2048 20/2048 19/2048 18/2048 17/2048 16/2048 15/2048 14/2048 13/2048 2.73 2.54 2.34 2.25 2.15 2.05 1.95 1.86 1.76 1.66 1.56 1.46 1.37 1.27 1.17 1.12 1.07 1.03 0.98 0.93 0.88 0.83 0.78 0.73 0.68 0.63 0.000 (@VDD=2.8 Threshold Voltage
19/22
Semiconductor
MSC1215-xx
APPLICATION CIRCUITS
Dimming Mode
DATAI/O CLOCK VREF Small Lamp Switch
Microcontroller
GRID1
MSC1215-xx GRID2
Dashboard Lamp Lamp Signal SEG1 OSC1 OSC0 SEG17
Duty Display Tube
20/22
Semiconductor Analog Dimming Mode
MSC1215-xx
Microcontroller
DATAI/O CLOCK VREF MSC1215-xx GRID2 GRID1
Small Lamp Switch
Brightness Control Resistor Dashboard Lamp OSC1 SEG1 OSC0 SEG17
Duty Display Tube
21/22
Semiconductor
MSC1215-xx
PACKAGE DIMENSIONS
(Unit
DIP42-P-600-2.54
Package material Lead frame material treatment Solder plate thickness Package weight
Epoxy resin alloy Solder plating more 6.20 TYP.
Notes Mounting Surface Mount Type Package SOP, QFP, TSOP, SOJ, (PLCC), surface mount type packages, which very susceptible heat reflow mounting humidity absorbed storage. Therefore, before perform reflow mounting, contact Oki's responsible sales person product name, package name, number, package code desired mounting conditions (reflow method, temperature times).
22/22

Semiconductor MSC1215-xx This version: Nov. 1997 MSC1215-xx Previ

Top Searches for this datasheet

Other recent searches