1/8- 1/16 Duty Controller/Driver Features 4-pin serial interface

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1/8- 1/16 Duty Controller/Driver Features 4-pin serial interface

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AD6311
1/8- 1/16 Duty Controller/Driver Features
4-pin serial interface scanning (12x4 matrices) Programming display modes (16-digit 12segment 8-digit 20-segment) Programming dimming step High-voltage output (VDD-35V max) channels ports 4-pin general-purpose input port Built-in oscillator external resistor necessary driver outputs
AD6311 (Vacuum Fluorescent Display) controller/driver that driven 1/8- 1/16 duty factor (include scan). consists segment/key scan output lines, grid output lines, segment/grid output drive lines, display memory, control circuit, scan circuit. Serial data input AD6311 through four-line serial interface.
Assignments
Seg19 Grid10 Seg18 Grid11 Seg17 Grid12 Seg16 Grid13 Seg15 Grid14 Seg14 Grid15 Seg13 Grid16
Seg20 Grid9
Grid6
Grid7
Grid8
Grid5 Grid4 Grid3 Grid2 Grid1 LED5 LED4 LED3 LED2 LED1
Seg12 KS12 Seg11 KS11 Seg10 KS10 Seg9 Seg8 Seg7 Seg6 Seg5 Seg4 Seg3 Seg2 Seg1
Key1
Key2
Key3
DOUT
power pins.
This datasheet contains product information. Anachip Corp. reserves rights modify product specification without notice. liability assumed result this product. rights under patent accompany sale product.
Key4
Rev. 2005 1/11
AD6311
1/8- 1/16 Duty Controller/Driver Descriptions
Symbol
DOUT
Name
Data input Data output
Description
Strobe
Seg1/KS1 Seg12/KS12 Grid1 Grid8 Seg13/Grid16 Seg20/Grid9 LED1 LED5 KEY1 KEY4
Clock input Oscillator High-voltage output High-voltage output (Grid) High-voltage output (Segment/grid) output data input Logic power Logic ground Pull-down level Switch input
Input serial data rising edge shift clock, starting from order bit. Output serial data falling edge shift clock, starting from order bit. This N-ch open-drain output pin. Initializes serial interface rising falling edge AD6311. then waits reception command. Data input after falling processed command. While command data processed, current processing stopped, serial interface initialized. While high, ignored. Reads serial data rising edge, outputs data falling edge. Connect resistor between this oscillation frequency. Multi-function pins, Segment output pins (Dual function scan source) Grid output pins These pins selectable segment grid driving. CMOS output Data input these pins latched display cycle. Logic power supply Connect this system GND. Driver power supply These pins constitute 4-bit general-purpose input port. connection
Ordering Information
AD6311X
Package QFP-52L
Lead Blank: Normal Lead Free
Packing Blank Tray
Anachip Corp. www.anachip.com.tw 2/11
Rev. 2005
AD6311
1/8- 1/16 Duty Controller/Driver Block Diagram
Command decoder DOUT Serial Display memory bitX16Words Dimming circuit Segment driver Segment/grid driver Grid driver Seg1
20-bit output latch
Data selector
Seg12
Seg13/Grid16
Timing generator scan data memory (4X2) 16-bit shift register
Seg20/Grid9
Grid1
KEY1 KEy4
4-bit latch
5-bit latch LED1 LED5
Grid8
(+5V) (0V) (-30V)
Anachip Corp. www.anachip.com.tw 3/11
Rev. 2005
AD6311
1/8- 1/16 Duty Controller/Driver Absolute Maximum Ratings
Parameter Logic supply voltage Driver supply voltage Logic input voltage driver output voltage driver output current driver output current Operating ambient temperature Storage temperature (TA=25,VSS=0V Symbol TOPT TSTG Rating -0.5 +7.0 +0.5 -0.5 +0.5 VEE-0.5 +0.5 -40(grid) (segment) +125 Unit
Operating Conditions
Parameter Logic supply voltage High-level input voltage Low-level input voltage Driver supply voltage Symbol
(TA=0 +70,VSS=0V) Conditions Min. Typ. Max. 0.3xVDD VDD-35 Unit
Characteristics
Parameter High-level output voltage Low-level output voltage Low-level output voltage High-level output current High-level output current Driver leakage current Output pull-down resistor High-level input voltage Low-level input voltage
(Ta=0 VDD=4.5 5.5V, VSS=0V, VEE=VDD-35V) Symbol VOH1 VOL1 VOL2 IOH21 IOH22 IOLEAK Conditions LED1-LED5,IOH1=-1mA LED1-LED5,IOL1=12mA DOUT,IOL2=2mA VO=VDD-2V,Seg1 Seg12 VO=VDD-2V,Grid Grid8, Seg13/Grid16 Seg20/Grid9 VO=VDD-35V, driver Driver output Min. 0.9VDD 0.7VDD 0.3VDD Typ. Max. Unit
Characteristics
Parameter Oscillation frequency Maximum clock frequency Clock pulse width Strobe pulse width Data setup time Data hold time Clock-strobe time Wait time
Note: Refer page
(Ta=0 +70,VDD=4.5 Symbol fOSC fmax. PWCLK PWSTB tSETUP tHOLD tCLK-STB tWAIT Conditions R=51 Duty=50% Min. Typ. Max. Unit
CLKSTB CLKCLk(Note)
Anachip Corp. www.anachip.com.tw 4/11
Rev. 2005
AD6311
1/8- 1/16 Duty Controller/Driver Function Description
Command command sets display mode status driver. first byte input AD6311 through after fallen regarded command. made high while command/data transmitted, serial communication initialized, command/data being transmitted invalid (however, command/data already transmitted remains valid). Display mode setting command This command initializes AD6311 selects number segments number grids grid segments grid segments). When this command executed, display forcibly turned off, scanning also stopped. resume display, display command must executed. same mode selected, however, nothing performed.
Don't care
Selects display mode 0xxx digits, segments 1000: digits, segments 1001: digits, segments 1010: digits, segments 1011: digits, segments 1100: digits, segments 1101: digits, segments 1110: digits, segments 1111: digits, segments
power application, 16-digit, 12-segment mode selected. Data setting command This command sets data write data read modes. power application, normal operation mode address increment mode set.
Sets data write read modes. Writes data display memory. Writes data port. Reads data. Reads data. Sets address increment mode (display memory). Incremenets address after data been written. Fixes address. Sets test mode Normal operation Test mode
Don't care
Anachip Corp. www.anachip.com.tw 5/11
Rev. 2005
AD6311
1/8- 1/16 Duty Controller/Driver
Address setting command This command sets address display memory. address higher set, data ignored, until correct address set. power application, address 00H.
Address (00H-2FH)
Display control command
Sets dimming quantity. 000: Sets pulse width 1/16. 001: Sets pulse width 2/16. 010: Sets pulse width 4/16. 011: Sets pulse width 10/16. 100: Sets pulse width 11/16. 101: Sets pulse width 12/16. 110: Sets pulse width 13/16. 111: Sets pulse width 14/16.
Don't care
Tums on/off display. Display (key scan continues Display
power application, 1/16-pulse width set, display turned scanning stopped. Display Address Display Mode display stores data transmitted from external device AD6311 through serial interface, assigned addresses follows, units bits: Seg1 Seg4 Seg8
Seg12
Seg16
Seg20 GRID1 GRID2 GRID3 GRID4 GRID5 GRID6 GRID7 GRID8 GRID9 GRID10 GRID11 GRID12 GRID13 GRID14 GRID15 GRID16
Anachip Corp. www.anachip.com.tw
XXHU
Rev. 2005 6/11
AD6311
1/8- 1/16 Duty Controller/Driver
Lower bits Higher bits
Only lower bits addresses assigned Seg17 through Seg20 valid, higher bits ignored. Port Data written port write command, starting from least significant port. When this port corresponding lights; when goes data bits through ignored.
LED1 Don't care LED2 LED3 LED4 LED5
power application, LEDs remain dark. Matrix Key-Input data Storage matrix configuration, shown below.
KEY1 KEY2 KEY3 KEY4
Seg1/KS1
Seg2/KS2
Seg3/KS3
Seg4/KS4
Seg5/KS5
Seg6/KS6
Seg7/KS7
Seg8/KS8
Seg9/KS9
Seg10/KS10
Seg11/KS11
data each stored illustrated below, read read command, starting from least significant bit. When most significant data (Seg12 been read, least significant next data (Seg1 read.
KEY1.KEY4 KEY1.KEY4
Seg1/KS1 Seg3/KS3 Seg5/KS5 Seg7/KS7 Seg9/KS9 Seg11/KS11 b0-b3
Anachip Corp. www.anachip.com.tw
Seg2/KS2 Seg4/KS4 Seg6/KS6 Seg8/KS8 Seg10/KS10 Seg12/KS12 b4-b7 Reading sequence
Seg12/KS12
Rev. 2005 7/11
AD6311
1/8- 1/16 Duty Controller/Driver
Data data read read command, starting from least significant bit. Bits through data
Timing Diagram
Serial Communication Format Reception (command/write data)
data continues
Transmission (read data)
DOUT Data reading command set. tWAIT (Note)
Data reading starts.
Because DOUT N-ch, open-drain output pin, sure connect external pull-up resistor this
Note When data read, wait time tWAIT necessary since rising eighth clock that command, until falling first clock that read data.
Anachip Corp. www.anachip.com.tw 8/11
Rev. 2005
AD6311
1/8- 1/16 Duty Controller/Driver
Scanning Display Timing
TDISP 500µ scan data DIG2 DIG3 DIGn DIG1
Output
DIG1
Grid1
Grid2
1/16 TDISP
Gird3
Gridn
frame (n+1)
cycle scanning consists frames, data matrices stored RAM. characteristic waveform
fosc
PWCLK PWCLK tCLK-STB
tSETUP
tHOLD
tPZL DOUT tTZH
tPLZ
Sn/Gn
tTHZ
Anachip Corp. www.anachip.com.tw 9/11
Rev. 2005
AD6311
1/8- 1/16 Duty Controller/Driver
Applications Updating display memory incrementing address
Command
Command
Command
Data
Data
Command
Command sets display mode Command sets data(write data display memory) Command sets address Data transfers display data bytes max.) Command controls display Updating specific display memory
Command
Command
Data
Command
Data
Command sets data Command sets address Data: display data
Anachip Corp. www.anachip.com.tw 10/11
Rev. 2005
AD6311
1/8- 1/16 Duty Controller/Driver Package Information
pins dimension
17.2 ±0.5 14.0 ±0.5
Unit:
2.7(MAX.)
14.0 17.2 ±0.5 ±0.5
0.15 TYP.
TYP.
TYP.
TYP.
0.88 TYP.
Marking Information
(Top View) Logo Part Number
AD6311
code: internal A~Z: Normal Lead Free Package Internal code week: 01~52 Year: "01" 2001 "02" 2002
QFP52
Anachip Corp. www.anachip.com.tw 11/11
Rev. 2005

1/8- 1/16 Duty Controller/Driver Features 4-pin serial interface

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