AD7312 1/4 to 1/11 Duty VFD Controller/Driver & Standby Master/Slave (Preliminary) Features output) ˙Remote signal input port ˙Remote signal output port ˙3 STANDBY master output ports (controlled by remote STANDBY-KEY, STANDBY-KEY and STANDBY SCAN-KEY) ˙8 WAKE UP master output ports (controlled by 2 remote WAKE_UP-KEY, 3 WAKE_UP SCAN-KEY, remote STANDBY-KEY, STANDBY-KEY and STANDBY SCAN-KEY) ˙NEC 6121/6122 infrared protocol support ˙Serial interface (CLK, STB, DIN, DOUT) ˙Key scanning (6× 4 matrices) ˙Programming display modes (11-digit & 11-segment to 6-digit & 16-segment) ˙Programming dimming step ˙High-voltage output (VDD-35V max). ˙2 channels LED ports. ˙2-pin General-purpose input port ˙Built-in oscillator ˙No external resistor necessary for driver outputs (provides PMOS open-drain and pull-low resistor General Description The AD7312 is a VFD (Vacuum Fluorescent Display) controller/driver with STANDBY controller. It is driven on a 1/4 to 1/11 duty factor (include key scan). It consists of 5 segment output lines, 6 segment/key scan output lines, 6 grid output lines, 5 segment/grid output drive lines, 2 LED output ports, a display memory, a control circuit, and a key scan circuit. In addition, it includes 2 input ports, RMIN and SKEY, RMIN receives the signal form the STANDBY-KEY of remote sensor, SKEY can be controlled by an external switch. Both of them and STANBY SCAN-KEY can control the output level (High) of PSV port to realize the STANDBY function. To leave the standby mode, we can use the 2 remote WAKE_UP-KEY, 3 WAKE_UP SCAN-KEY, remote STANDBY-KEY, STANDBY-KEY and STANDBY SCAN-KEY to control the output level (Low) of PSV port to realize the Wake Up function. Serial data is input to the AD7312 through a four-line serial interface. This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev. A2 Dec 29, 2003 1/12 AD7312 1/4 to 1/11 Duty VFD Controller/Driver & Standby Master/Slave (Preliminary) Grid5 Grid6 Seg16 / Grid7 Seg15 / Grid8 Seg14 / Grid9 Seg13 / Grid10 VEE Seg12 / Grid11 Seg11 Seg10 Seg9 33 32 31 30 29 28 27 26 25 24 23 Pin Assignments Grid 4 34 Grid 3 Grid 2 22 Seg 8 35 21 Seg 7 36 20 Seg 6 / KS 6 Grid 1 37 19 Seg 5 / KS 5 VDD 38 18 Seg 4 / KS 4 LED 4 39 17 Seg 3 / KS 3 RMBUF 40 16 Seg 2 / KS 2 7 8 9 10 11 VSS CLK STB Key1 Key2 Key3 6 12 DIN 44 5 OSC DOUT Key4 4 13 Sw4 43 3 VSS SKEY VDD 2 Seg 1 / KS 1 14 RMIN 15 42 1 41 Sw1 PSV LED 1 Use all power pins. Anachip Corp. www.anachip.com.tw Rev. A2 Dec 29, 2003 2/12 AD7312 1/4 to 1/11 Duty VFD Controller/Driver & Standby Master/Slave (Preliminary) Pin Descriptions Symbol Name No. DIN Data input 6 DOUT Data output 5 STB Strobe 9 CLK Clock input 8 OSC Oscillator pin 44 Seg7 to Seg11 High-voltage output (Segment) 21 to 25 Segment output pins Seg1/KS1 to Seg6/KS6 High-voltage output 15 to 20 Multi-function pins, Segment output pins (Dual function as key scan source) Grid1 to Grid6 High-voltage output (Grid) 32 to 37 Grid output pins Seg12/Grid11 to Seg16/Grid7 High-voltage output (Segment/grid) 26, 28 to 31 These pins are selectable for segment or grid driving. LED1 and LED4 LED output 39 and 42 CMOS output RMBUF Remote Control Buffer 40 CMOS output PSV Power Saving Output 41 CMOS output KEY1 to KEY4 Key data input 10 to 13 VDD Logic power 14, 38 Logic power supply VSS Logic ground 7, 43 Connect this pin to system GND. VEE Pull-down level 27 SW1 and SW4 Switch input 1 and 4 RMIN Remote Control Input 2 Input pin SKEY Standby Key Input 3 Input pin Anachip Corp. www.anachip.com.tw Description Input serial data at rising edge of shift clock, starting from the low order bit. Output serial data at the falling edge of the shift clock, starting from low order bit. This is N-ch open-drain output pin. Initializes serial interface at the rising or falling edge of the AD7312. It then waits for reception of a command. Data input after STB falling is processed as a command. While command data is processed, current processing is stopped, and the serial interface is initialized. While STB is high, CLK is ignored. Reads serial data at the rising edge, and outputs data at the falling edge. Connect resistor in between this pin and Vdd to set up the oscillation frequency. Data input to these pins is latched at the end of the display cycle. Driver power supply These pins constitute a 2-bit general-purpose input port. Rev. A2 Dec 29, 2003 3/12 AD7312 1/4 to 1/11 Duty VFD Controller/Driver & Standby Master/Slave (Preliminary) Ordering Information AD7312 X X X Package Lead Packing Q: QFP-44L L: LQFP-44L Blank: Normal F: Lead Free Blank : Tray CLK STB 2 2-bit latch Key data memory (4× 6) 2-bit latch Remote Control decoder REBUF 2 Segment driver 5 5 5 Anachip Corp. www.anachip.com.tw Seg1/KS1 Seg6/KS6 Seg7 Seg11 Seg12/Grid11 Seg16/Grid7 5 11 6 PSV LED1,4 Segment/grid driver SW1 SW4 4 16 11 Grid driver OSC KEY1 to KEY4 Timing generator key scan 6 Data selector R 16-bit output latch STB Display memory 16 bits× 11 Words 11-bit shift register Serial I/F CLK VDD Dimming circuit Command decoder DIN DOUT Segment/ key scan Block Diagram Grid1 Grid6 VDD VSS VEE (+5V) (0V) (-30V) Rev. A2 Dec 29, 2003 4/12 AD7312 1/4 to 1/11 Duty VFD Controller/Driver & Standby Master/Slave (Preliminary) Absolute Maximum Ratings (TA=25oC,VSS=0V ) Parameter Logic Supply Voltage Driver Supply Voltage Logic Input Voltage VFD Driver Output Voltage LED Driver Output Current Symbol VDD VEE VI1 VO2 IO1 VFD Driver Output Current IO2 Operating Ambient Temperature Storage Temperature Rating -0.5 to +7.0 VDD +0.5 to VDD -40 -0.5 to VDD +0.5 VEE-0.5 to VDD +0.5 +15 -40 (grid) -15 (segment) -25 to +85 -50 to +125 TOPT TSTG Unit V V V V mA mA o C C o Operating Conditions (TA=0 to +70 oC,VSS=0V) Parameter Logic Supply Voltage High-Level Input Voltage Low-Level Input Voltage Driver Supply Voltage Symbol VDD VIH VIL VEE Conditions Min. 4.5 0.7·VDD 0 0 Typ. 5 Max. 5.5 VDD 0.3·VDD VDD-35 Unit V V V V DC Characteristics (TA=0 to 70 oC, VDD=4.5 to 5.5V, VSS=0V, VEE=VDD-35V) Parameter High-Level Output Voltage Low-Level Output Voltage Low-Level Output Voltage High-Level Output Current Symbol VOH1 VOL1 VOL2 IOH21 High-Level Output Current IOH22 Driver Leakage Current Output Pull-Down Resistor High-Level Input Voltage Low-Level Input Voltage IOLEAK RL VIH VIL Conditions LED1/LED4, IOH1=-1mA LED1/LED4, IOL1=12mA DOUT, IOL2=2mA VO=VDD-2V, Seg1 to Seg11 VO=VDD-2V, Grid 1 to Grid6 Seg12/Grid11 to Seg16/Grid7 VO=VDD-35V, driver off Driver output Min. 0.9VDD -3 Unit V V V mA -15 mA 50 0.7VDD Typ. Max. 1 0.4 100 -10 150 0.3VDD μA kΩ V V AC Characteristics (Ta=0 to +70 oC,VDD=4.5 to 5.5 V, 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 Propagation delay time Rise time Fall time Note : Refer to page 8. Symbol fOSC fmax. PWCLK PWSTB tSETUP tHOLD tCLK-STB tWAIT tPHZ tPZL tTZH tTHZ Conditions R=51 kΩ Duty=50% CLK↑→STB↑ CLK↑→CLK↓(Note) CLK→DOUT CL=15pF,RL=10 kΩ CL=300pF Anachip Corp. www.anachip.com.tw Segn,Gridn Min. 350 Typ. 500 Max. 650 1 500 1 100 100 1 1 300 100 2 160 Unit KHZ MHZ ns µs ns ns µs µs ns ns µs µs Rev. A2 Dec 29, 2003 5/12 AD7312 1/4 to 1/11 Duty VFD Controller/Driver & Standby Master/Slave (Preliminary) Timing Diagram (1) Serial Communication Format Reception (command/write data) If data continues STB b0 DIN CLK b1 1 b2 2 b6 3 b7 7 8 Transmission (read data) STB DIN b0 b1 b2 b3 b4 b5 b6 b7 CLK 1 2 3 4 5 6 7 8 DOUT A data read command is set. tWAIT (Note) 1 2 3 4 5 6 b0 b1 b2 b3 b4 b5 Data is read. Because the DOUT pin is an N-ch, open-drain output pin, be sure to connect an external pull-up resistor to this pin (1kΩ to 10 kΩ). Note : When data is read, a wait time tWAIT of 1 μs is necessary since the rising of the eighth clock that has set the command, until the falling of the first clock that has read the data. Anachip Corp. www.anachip.com.tw Rev. A2 Dec 29, 2003 6/12 AD7312 1/4 to 1/11 Duty VFD Controller/Driver & Standby Master/Slave (Preliminary) (2) Key Scanning and Display Timing On cycle of key scanning consists of one frame, and data in a 6× 4 matrix is stored in RAM. TDISP ≅ 500μs SEG Output DIG1 Key scan data DIG2 DIGn DIG3 1 23 456 DIG1 Grid1 Grid2 1/16 TDISP Grid3 Gridn 1 frame = TDISP× (n+1) Switching characteristic waveforms fosc OSC 50% PWSTB STB PWCLK PWCLK tSETUP tHOLD tCLK-STB CLK DIN tPZL tPLZ DOUT tTZH tTHZ Sn/Gn 90% 10% Anachip Corp. www.anachip.com.tw Rev. A2 Dec 29, 2003 7/12 AD7312 1/4 to 1/11 Duty VFD Controller/Driver & Standby Master/Slave (Preliminary) Applications Updating display memory by incrementing address STB CLK DIN Command 1 Command 2 Command 3 Data 1 Data n Command 4 Command 1: sets display mode Command 2: sets data(write data to display memory) Command 3: sets address Data 1 to n: transfers display data (22bytes max.) Command 4: controls display Updating specific display memory and write registers STB CLK DIN Command 1 Command 2 Data Command 2 Data Command 1: sets data Command 2: sets address Data: display data Anachip Corp. www.anachip.com.tw Rev. A2 Dec 29, 2003 8/12 AD7312 1/4 to 1/11 Duty VFD Controller/Driver & Standby Master/Slave (Preliminary) Reading specific registers STB CLK DIN Command 1 Command 2 Data1 Command2 Address2 Anachip Corp. www.anachip.com.tw Data2 Commandn Addressn Rev. A2 Dec 29, 2003 9/12 AD7312 1/4 to 1/11 Duty VFD Controller/Driver & Standby Master/Slave (Preliminary) Package Information (1) Package Type: QFP-44L Dimension in millimeter (mm.) 13.2 ± 0.5 2.7(MAX.) 10.0 ± 0.5 33 23 34 22 10.0 13.2 ± 0.5 ± 0.5 44 12 1 11 0.15 TYP. 1.6 TYP. 0.3 TYP. 0.8 TYP. 0.88 TYP. Anachip Corp. www.anachip.com.tw Rev. A2 Dec 29, 2003 10/12 AD7312 1/4 to 1/11 Duty VFD Controller/Driver & Standby Master/Slave (Preliminary) (2) Package Type: LQFP-44L ( Top View ) e E E1 b PIN 1 INDENT 12o(4X) C D1 A A2 D R0.08 MIN. A1 y DETAIL A L θ 0.25 GAGE PLANE L1 DETAIL A Symbol A A1 A2 b C E E1 D D1 e L L1 θ y Dimensions In 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 0˚ 3.5˚ 7˚ 0.00 0.08 Anachip Corp. www.anachip.com.tw Dimensions In 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 0˚ 3.5˚ 7˚ 0.000 0.003 Rev. A2 Dec 29, 2003 11/12 AD7312 1/4 to 1/11 Duty VFD Controller/Driver & Standby Master/Slave (Preliminary) Marking Information Top view Part Number AC AD7312 X XX XX XXX Logo Blank: Normal F: Lead Free Package ID code: internal Nth week: 01~52 Year: "01" = 2001 "02" = 2002 QFP44/LQFP44 Anachip Corp. www.anachip.com.tw Rev. A2 Dec 29, 2003 12/12