1/4- 1/11 Duty Controller/Driver Features 4-pin serial interface
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AD6312
1/4- 1/11 Duty Controller/Driver Features
4-pin serial interface scanning matrices) Programming display modes (11-segments 11digits 16-segments 6-digits) 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
AD6312 (Vacuum Fluorescent Display) controller/driver that driven 1/4- 1/11 duty factor (include scan). consists segment output lines, segment/key scan output lines, grid output lines, segment/grid output drive lines, display memory, control circuit, scan circuit. Serial data input AD6312 through four-line serial interface.
Assignments
Seg13 Grid10
Seg12 Grid11
Seg16 Grid7
Seg15 Grid8
Seg14 Grid9
Seg11
Seg10
Grid5
Grid6
Seg9
Grid4 Grid3 Grid2 Grid1 LED4 LED3 LED2 LED1
Seg8 Seg7 Seg6 Seg5 Seg4 Seg3 Seg2 Seg1 Key4 Key3
Key1
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.
Key2
Rev. 2003 1/13
AD6312
1/4- 1/11 Duty Controller/Driver Descriptions
Symbol
DOUT
Name
Data input Data output
Description
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 AD6312. 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. Segment output pins 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.
Strobe
Seg7 Seg11 Seg1/KS1 Seg6/KS6 Grid1 Grid6 Seg12/Grid11 Seg16/Grid7 LED1 LED4 KEY1 KEY4
Clock input Oscillator High-voltage output (Segment) High-voltage output High-voltage output (Grid) High-voltage output (Segment/grid) output data input Logic power Logic ground Pull-down level Switch input
39to
Ordering Information
AD6312
Package QFP-44L LQFP-44L
Lead Blank: Normal Lead Free
Packing Blank Tray
Anachip Corp. www.anachip.com.tw 2/13
Rev. 2003
AD6312
1/4- 1/11 Duty Controller/Driver Block Diagram
Segment/ scan
Command decoder DOUT Serial Display memory Words
Dimming circuit
Seg1/KS1 Seg6/KS6 Seg7 Seg11 Seg12/Grid11
16-bit output latch
Data selector
Timing generator scan data memory 11-bit shift register
Segment/grid driver Grid driver
Segment driver
Seg16/Grid7
Grid1
KEY1 KEy4
4-bit latch
4-bit latch LED1 LED4
Grid6
data memory (4x6)
(+5V) (0V) (-30V)
Anachip Corp. www.anachip.com.tw 3/13
Rev. 2003
AD6312
1/4- 1/11 Duty Controller/Driver Absolute Maximum Ratings (TA=25oC,VSS=0V
Parameter Logic Supply Voltage Driver Supply Voltage Logic Input Voltage Driver Output Voltage Driver Output Current Driver Output Current Operating Ambient Temperature Storage Temperature Symbol TOPT TSTG Rating -0.5 +7.0 +0.5 -0.5 +0.5 VEE-0.5 +0.5 (grid) (segment) +125 Unit
Operating Conditions (TA=0 oC,VSS=0V)
Parameter Logic Supply Voltage High-Level Input Voltage Low-Level Input Voltage Driver Supply Voltage Symbol Conditions Min. Typ. Max. VDD-35 Unit
Characteristics (TA=0 VDD=4.5 5.5V, VSS=0V, VEE=VDD-35V)
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 Symbol VOH1 VOL1 VOL2 IOH21 IOH22 IOLEAK Conditions LED1-LED4, IOH1=-1mA LED1-LED4, IOL1=12mA DOUT, IOL2=2mA VO=VDD-2V, Seg1 Seg11 VO=VDD-2V, Grid Grid6 Seg12/Grid11 Seg16/Grid7 VO=VDD-35V, driver Driver output Min. 0.9VDD 0.7VDD 0.3VDD Typ. Max. Unit
Characteristics (Ta=0 oC,VDD=4.5 VEE=-30V)
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
Anachip Corp. www.anachip.com.tw 4/13
Symbol fOSC fmax. PWCLK PWSTB tSETUP tHOLD tCLK-STB tWAIT
Conditions R=51 Duty=50%
Min.
Typ.
Max.
CLKSTB CLKCLK(Note)
Unit
Rev. 2003
AD6312
1/4- 1/11 Duty Controller/Driver Function Descriptions
Commands Commands display mode status driver. first byte input AD6312 through after fallen regarded command. high while commands/data transmitted, serial communication initialized, commands/data being transmitted invalid (however, commands/data previously transmitted remain valid). Display mode setting commands These commands initialize AD6312 select number segments number grids grids segments grids segments to). When these commands executed, display forcibly turned off, scanning also stopped. resume display, display command "ON" must executed. same mode selected, however, nothing happens.
Display mode settings 000: digits, segments 001: digits, segments 010: digits, segments 011: digits, segments 100: digits, segments 101: digits, segments 110: digits, segments 111: digits, segments
Irrelevant
power application, 11-digit, 11-segment mode selected. Data setting commands These commands data write data read modes. power application, normal operation address increment modes set.
Data write read mode settings. Write data display memory. Write data port. Read data. Read data. Address increment mode settings (display memory). Incremenets address after data been written. Fixes address. Test mode settings Normal operation Test mode
Irrelevant
Anachip Corp. www.anachip.com.tw 5/13
Rev. 2003
AD6312
1/4- 1/11 Duty Controller/Driver
Address setting commands These commands address display memory. address higher set, data ignored, until valid address set. power application, address 00H.
Address (00H-15H)
Display control commands
Dimming quantity settings 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.
Irrelevant
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 AD6312 through serial interface, assigned addresses follows, bits unit: Seg1 Seg4
Seg8 XXHU
Seg12
Seg16
DIG1 DIG2 DIG3 DIG4 DIG5 DIG6 DIG7 DIG8 DIG9 DIG10 DIG11
Lower bits
Higher bits
Anachip Corp. www.anachip.com.tw 6/13
Rev. 2003
AD6312
1/4- 1/11 Duty Controller/Driver
Port Data written port with write command, starting from least port's least significant bit. When this port corresponding lights; when turns off. data bits through ignored. power application, LEDs unlit.
LED1 Don't care LED2 LED3 LED4
Matrix Key-Input data Storage matrix made matrix, shown below.
KEY1 KEY2 KEY3 KEY4
Seg1/KS1
Seg2/KS2
Seg3/KS3
Seg4/KS4
Seg5/KS5
data each stored illustrated below, read with read command, starting from least significant bit.
KEY1.KEY4 KEY1.KEY4
Seg1/KS1 Seg3/KS3 Seg5/KS5 b0-b3
Seg2/KS2 Seg4/KS4 Seg6/KS6 b4-b7 Reading sequence
Anachip Corp. www.anachip.com.tw 7/13
Seg6/KS6
Rev. 2003
AD6312
1/4- 1/11 Duty Controller/Driver
Data data read with 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 read command set. tWAIT (Note)
Data read.
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 8/13
Rev. 2003
AD6312
1/4- 1/11 Duty Controller/Driver
Scanning Display Timing cycle scanning consists frame, data matrix stored RAM.
TDISP 500s Output DIG1 DIG2 DIG3 DIGn scan data DIG1
Grid1
Grid2
1/16 TDISP
Grid3
Gridn
frame (n+1)
Switching characteristic waveforms
fosc
PWSTB PWCLK PWCLK tCLK-STB
tSETUP
tHOLD
tPZL DOUT tTHZ Sn/Gn
tPLZ
tTZH
Anachip Corp. www.anachip.com.tw 9/13
Rev. 2003
AD6312
1/4- 1/11 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 (22bytes 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 10/13
Rev. 2003
AD6312
1/4- 1/11 Duty Controller/Driver Package Information
Package Type: QFP-44L Dimension millimeter (mm.)
13.2 10.0 2.7(MAX.)
10.0 13.2
0.15 TYP.
TYP.
TYP.
TYP.
0.88 TYP.
Anachip Corp. www.anachip.com.tw 11/13
Rev. 2003
AD6312
1/4- 1/11 Duty Controller/Driver
Package Type: LQFP-44L
View
INDENT
12o(4X)
R0.08 MIN. DETAIL DETAIL
0.25 GAGE PLANE
Symbol
Dimensions Millimeters Min. Nom. Max. 1.60 0.05 0.10 0.15 1.35 1.40 1.45 0.30 0.37 0.45 0.09 0.20 11.50 12.00 12.50 9.50 10.00 10.50 11.80 12.00 12.20 9.90 10.00 10.10 0.80 0.45 0.60 0.75 1.00 3.5° 0.00 0.08
Dimensions Inches Min. Nom. Max. 0.063 0.002 0.004 0.006 0.053 0.055 0.057 0.012 0.015 0.018 0.004 0.008 0.453 0.472 0.492 0.374 0.394 0.413 0.465 0.472 0.480 0.390 0.394 0.398 0.031 0.018 0.024 0.030 0.039 3.5° 0.000 0.003
Anachip Corp. www.anachip.com.tw 12/13
Rev. 2003
AD6312
1/4- 1/11 Duty Controller/Driver Marking Information
view
Part Number
AD6312
Logo Blank: Normal Lead Free Package code: internal week: 01~52 Year: "01" 2001 "02" 2002
QFP44/LQFP44
Anachip Corp. www.anachip.com.tw 13/13
Rev. 2003
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