Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 DESCRIPTION PT6961 is an LED Controller driven on a 1/7 to 1/8 duty factor. Eleven segment output lines, six grid output lines, 1 segment/grid output lines, one display memory, control circuit, key scan circuit are all incorporated into a single chip to build a highly reliable peripheral device for a single chip microcomputer. Serial data is fed to PT6961 via a four-line serial interface. Housed in a 32-pin SOP, PT6961 pin assignments and application circuit are optimized for easy PCB Layout and cost saving advantages. FEATURES • • • • • • • CMOS Technology Low Power Consumption Multiple Display Modes (12 segment, 6 Grid to 11 segment, 7 Grid) Key Scanning (10 x 3 Matrix) 8-Step Dimming Circuitry Serial Interface for clock, data Input, data output, strobe pins Available in 32-pin, SOP APPLICATIONS • • • Micro-computer peripheral device VCR set Combo set PT6961 V1.4 -1- April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 BLOCK DIAGRAM SG1/KS1 SG2/KS2 SG3/KS3 Control SG4/KS4 DIN DOUT CLK Serial Data Interface STB SG5/KS5 Display Memory SG6/KS6 SG7/KS7 SG8/KS8 OSC OSC Segment Driver/ Key Scan Output/ Grid Driver Timing Generator R SG9/KS9 SG10/KS10 SG11 Key Matrix Memory SG12/GR7 Dimming Circuit GR6 GR5 GR4 GR3 GR2 GR1 K1 K2 K3 PT6961 V1.4 VDD GND -2- April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 PIN DESCRIPTION OSC DOUT DIN CLK STB K1 K2 K3 VDD SG1/KS1 SG2/KS2 SG3/KS3 NC SG4/KS4 SG5/KS5 SG6/KS6 PT6961 V1.4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PT6961 -3- 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 GND GR1 GR2 GND GR3 GR4 GND VDD GR5 GR6 SG12/GR7 SG11 SG10/KS10 SG9/KS9 SG8/KS8 SG7/KS7 April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 INPUT/OUTPUT CONFIGURATIONS The schematic diagrams of the input and output circuits of the logic section are shown below. Input Pins: CLK, STB & DIN Input Pins: K1 to K3 GND Output Pins: DOUT, GR1 to GR4 Output Pins: SG1 to SG11 Output Pins: GR5, GR6 and SG12/GR7 PT6961 V1.4 -4- April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 PIN DESCRIPTION Pin Name OSC I DOUT O DIN I CLK I STB I K1 ~ K3 I VDD - SG1/KS1 ~ SG10/KS10 O NC SG11 SG12/GR7 O O Description Oscillator Input Pin A resistor is connected to this pin to determine the oscillation frequency Data Output Pin (N-Channel, Open-Drain) This pin outputs serial data at the falling edge of the shift clock. Data Input Pin This pin inputs serial data at the rising edge of the shift clock (starting from the lower bit) Clock Input Pin This pin reads serial data at the rising edge and outputs data at the falling edge. Serial Interface Strobe Pin The data input after the STB has fallen is processed as a command. When this pin is HIGH", CLK is ignored. Key Data Input Pins The data sent to these pins are latched at the end of the display cycle. (Internal Pull-Low Resistor) Power Supply Segment Output Pins (p-channel, open drain) Also acts as the Key Source No Connection Segment Output pins (P-Channel, open drain) Segment/Grid Output Pins GR6 ~ GR1 O Grid Output Pins GND - Ground Pin PT6961 V1.4 I/O -5- Pin No. 1 2 3 4 5 6, 7, 8 9, 25 10 ~ 12, 14 ~ 20 13 21 22 23, 24, 27, 28, 30, 31 26, 29, 32 April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 FUNCTION DESCRIPTION COMMANDS A command is the first byte (b0 to b7) inputted to PT6961 via the DIN Pin after STB Pin has changed from HIGH to LOW State. If for some reason the STB Pin is set to HIGH while data or commands are being transmitted, the serial communication is initialized, and the data/commands being transmitted are considered invalid. COMMANDS 1: DISPLAY MODE SETTING COMMANDS PT6961 provides 2 display mode settings as shown in the diagram below: As stated earlier a command is the first one byte (b0 to b7) transmitted to PT6961 via the DIN Pin when STB is LOW. However, for these commands, the bit 3 to bit 6 (b2 to b5) are ignored, bit 7 & bit 8 (b6 to b7) are given a value of 0. The Display Mode Setting Commands determine the number of segments and grids to be used (12 to 11 segments, 6 to 7 grids). A display command ON must be executed in order to resume display. If the same mode setting is selected, no command execution is take place, therefore, nothing happens. When Power is turned ON, the 7-grid, 11-segment modes is selected. MSB 0 0 - - - Not relevant PT6961 V1.4 - LSB b1 b0 Display mode settings: 10: 6 digits, 12 segments 11: 7 digits, 11 segments -6- April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 COMMANDS 2: DATA SETTING COMMANDS The Data Setting Commands executes the Data Write or Data Read Modes for PT6961. The data Setting Command, the bits 5 and 6 (b4, b5) are ignored, bit 7 (b6) is given the value of 1 while bit 8 (b7) is given the value of 0. Please refer to the diagram below. When power is turned ON, bit 4 to bit 1 (b3 to b0) are given the value of 0. MSB 0 1 - - Not relevant LSB b3 b2 b1 b0 Data write & read mode settings: 00: Write data to display mode 10: Read key data Address increment mode settings (Display mode): 0: Increment address after data has been written 1: Fixed address Mode settings: 0: Normal operation mode 1: Test mode PT6961 V1.4 -7- April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 PT6961 KEY MATRIX & KEY INPUT DATA STORAGE RAM PT6961 Key Matrix consists of 10 x 3 array as shown below: K1 K2 SG10/KS10 SG9/KS9 SG8/KS8 SG7/KS7 SG6/KS6 SG5/KS5 SG4/KS4 SG3/KS3 SG2/KS2 SG1/KS1 K3 Each data entered by each key is stored as follows and read by a READ Command, starting from the last significant bit. When the most significant bit of the data (b0) has been read, the least significant bit of the next data (b7) is read. K1…………………K3 SG1/KS1 SG3/KS3 SG5/KS5 SG7/KS7 SG9/KS9 b0………………….b2 K1…………………K3 SG2/KS2 SG4/KS4 SG6/KS6 SG8/KS8 SG10/KS10 b3………………….b5 x x x x x b6………………….b7 Reading Sequence Note: b6 and b7 do not care. PT6961 V1.4 -8- April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 COMMANDS 3: ADDRESS SETTING COMMANDS Address Setting Commands are used to set the address of the display memory. The address is considered valid if it has a value of 00H to 0DH. If the address is set to 0EH or higher, the data is ignored until a valid address is set. When power is turned ON, the address is set at 00H. Please refer to the diagram below. MSB 1 1 - LSB b3 b2 b1 b0 - Not relevant Address: 00H to 0DH DISPLAY MODE AND RAM ADDRESS Data transmitted from an external device to PT6961 via the serial interface are stored in the Display RAM and are assigned addresses. The RAM addresses of PT6961 are given below in 8 bits unit. SG1 SG4 SG5 SG8 SG12 00HL 00HU 01HL DIG1 02HL 02HU 03HL DIG2 04HL 04HU 05HL DIG3 06HL 06HU 07HL DIG4 08HL 08HU 09HL DIG5 0AHL 0AHU 0BHL DIG6 0CHL 0CHU 0DHL DIG7 b0 PT6961 V1.4 SG9 b3 b4 b7 xxHL xxHU Lower 4 bits Higher 4 bits -9- April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 COMMAND 4: DISPLAY CONTROL COMMANDS The Display Control Commands are used to turn ON or OFF a display. It also used to set the pulse width. Please refer to the diagram below. When the power is turned ON, a 1/16 pulse width is selected and the displayed is turned OFF (the key scanning is started). MSB 1 0 - - Not relevant LSB b3 b2 b1 b0 Dimming quantity settings: 000: Pulse width=1/16 001: Pulse width=2/16 010: Pulse width=4/16 011: Pulse width=10/16 100: Pulse width=11/16 101: Pulse width=12/16 110: Pulse width=13/16 111: Pulse width=14/16 Display settings: 0: Display off (Key scan continues) 1: Display on PT6961 V1.4 - 10 - April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 SCANNING AND DISPLAY TIMING T DIS P L AY= 500 µ s SG Output DIG1 Key S can Data DIG2 DIG3 DIGn DIG1 G1 G2 G3 Gn 1 F rame = T D IS P LAY x (n +1) PT6961 V1.4 - 11 - April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 SERIAL COMMUNICATION FORMAT The following diagram shows the PT6961 serial communication format. The DOUT Pin is an N-channel, open-drain output pin, therefore, it is highly recommended that an external pull-up resistor (1 KΩ to 10 KΩ) must be connected to DOUT. RECEPTION (DATA/COMMAND WRITE) I f d at a c o n tin u e s ST B DIN b0 CLK 1 b1 b2 b6 3 2 b7 7 8 TRANSMISSION (DATA READ) ST B DIN CLK b0 1 b1 2 b2 3 b3 4 b4 5 b5 6 b6 b7 7 8 t wa it 1 b0 DOUT D a t a R e ad C o m m an d is s e t 3 2 b1 5 4 b2 b3 6 b4 b5 D a t a R e ad in g S t a rt s where: twait (waiting time) ≥ 1µs It must be noted that when the data is read, the waiting time (twait) between the rising of the eighth clock that has set the command and the falling of the first clock that has read the data is greater or equal to 1µs. PT6961 V1.4 - 12 - April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 SWITCHING CHARACTERISTIC WAVEFORM PT6961 Switching Characteristics Waveform is given below. fosc OSC 50 % PW ST B ST B PW CL K PW CL K t set u p t ho ld t CL K -ST B CLK DIN t P LZ t P ZL DOUT t TZL Gn Sn t TL Z 90 % 90 % 10 % 10 % 90 % 90 % 10 % 10 % t TZH where: PWCLK (Clock Pulse Width) ≥ 400ns tsetup (Data Setup Time) ≥100ns tCLK-STB (Clock - Strobe Time) ≥ 1µs tTZH (Rise Time) ≤ 1 µs fosc = Oscillation Frequency tTZL≤ 1µs (VDD=5V) tTZL≤2µs (VDD=3V) tTLZ ≤10 µs (VDD=5V) t THZ PWSTB (Strobe Pulse Width) ≥ 1µs thold (Data Hold Time) ≥ 100ns tTHZ (Fall Time) ≤ 10µs tPZL (Propagation Delay Time) ≤ 100ns(5V) tPZL (Propagation Delay Time) ≤200ns(3V) tPLZ (Propagation Delay Time) ≤ 300ns(5V) tPLZ (Propagation Delay Time) ≤ 600ns(3V) tTLZ ≤ 20 µs (VDD=3V) Note: Test Condition Under tTHZ (Pull low resistor = 10KΩ, Loading capacitor = 300pF tTLZ (Pull high resistor = 10KΩ, Loading capacitor = 300pF PT6961 V1.4 - 13 - April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 APPLICATIONS Display memory is updated by incrementing addresses. Please refer to the following diagram. ST B CLK DIN Co mm and 2 Co mm and 3 Da ta 1 Da ta n Co mm and 1 Co mm and 4 Where: Command 1: Display mode setting command Command 2: Data setting command Command 3: Address setting command Data 1 to n: Transfer display data (14 bytes max.) Command 4: Display control command The following diagram shows the waveforms when updating specific addresses. ST B CLK DIN Co mm and 2 Co mm and 3 Da ta Co mm and 3 Da ta Where: Command 2: Data setting command Command 3: Address setting command Data: Display data PT6961 V1.4 - 14 - April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 RECOMMENDED SOFTWARE FLOWCHART START Delay 200 ms SET COMMAND 2 (Write Data) SET COMMAND 3 Clear Display RAM (See Note 5) SET COMMAND 1 INITIAL SETTING SET COMMAND 4 (88H ~ 87H: Display OFF) SET COMMAND 1 SET COMMAND 4 (88H ~ 8FH : Display ON) MAIN PROGRAM SET COMMAND 2 (READ KEY & WRITE DATA INCLUDED) MAIN LOOP SET COMMAND 3 SET COMMAND 1 SET COMMAND 4 END Notes: 1. Command 1: Display Mode Commands 2. Command 2: Data Setting Commands 3. Command 3: Address Setting Commands 4. Command 4: Display Control Commands 5. When IC power is applied for the first time, the contents of the Display RAM is not defined; thus, it is strongly suggested that the contents of the Display RAM be cleared during the initial setting. PT6961 V1.4 - 15 - April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 SOP 32 (300MIL) THERMAL PERFORMANCE IN STILL AIR JUNCTION TEMPERATURE: 100℃ PT6961 V1.4 - 16 - April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 ABSOLUTE MAXIMUM RATINGS (Unless otherwise specified, Ta=25℃, GND=0V) Parameter Symbol Supply voltage VDD Logic input voltage VI IOLGR Driver output current IOHSG Maximum driver output current/total ITOTAL Operating temperature Topr Storage temperature Tstg Ratings -0.5 to +7 -0.5 to VDD+0.5 +250 -50 400 -40 ~ +85 -65 ~ +150 Unit V V mA mA mA ℃ ℃ RECOMMENDED OPERATING RANGE (Unless otherwise specified, Topr=25℃, GND=0V) Parameter Symbol Condition Min. Logic supply voltage VDD VDD 3 Dynamic current (see Note) IDDdyn VDD VDD=5V 0.8 VDD High-level input voltage VIH VDD=3V 0.8 VDD VDD=5V 0 Low-level input voltage VIL VDD=3V 0 Typ. 5 - Max. 5.5 5 VDD VDD 0.3 VDD 0.3 Unit V mA V V Note: Test Condition: Set Display Control Commands = 80H (Display Turn OFF State & under no load) PT6961 V1.4 - 17 - April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 ELECTRICAL CHARACTERISTICS (Unless otherwise stated, VDD =5V, GND=0V, Ta=25℃) Parameter Symbol Test Condition Min. Typ. Max. VO= VDD -2V IOHSG(1) -20 -25 -40 SG1 to SG11, SG12/GR7 High-level output current VO= VDD -3V IOHSG(2) -25 -30 -50 SG1 to SG11, SG12/GR7 VO=0.3V Low-level output current IOLGR 100 140 GR1 to GR6, SG12/GR7 Low-level output current IOLDOUT VO=0.4V 4 Segment high-level VO= VDD -3V ITOLSG ±5 output current tolerance SG1 to SG11, SG12/GR7 High-level input voltage VIH 0.8VDD 5 Low-level input voltage VIL 0 0.3VDD Oscillation frequency fosc 350 500 650 R=51KΩ K1 to K3 K1 to K3 pull down resistor RKN 40 100 VDD =5V Unit mA mA mA mA % V V KHz KΩ ELECTRICAL CHARACTERISTICS (Unless otherwise stated, VDD =3V, GND=0V, Ta=25℃) Parameter Symbol Test Condition Min. Typ. VO=VDD-2V High-level output current IOHSG -9 -12 SG1 to SG11, SG12/GR7 VO=0.3V Low-level output current IOLGR 80 100 GR1 to GR6, SG12/GR7 Low-level output current IOLDOUT VO=0.4V 3 Segment high-level VO= VDD -2V ITOLSG output current tolerance SG1 to SG11, SG12/GR7 High-level input voltage VIH 0.8VDD Low-level input voltage VIL 0 Oscillation frequency fosc 350 500 R=33KΩ K1 to K3 K1 to K3 pull down resistor RKN 90 VDD=3V PT6961 V1.4 - 18 - Max. Unit -20 mA - mA - mA ±5 % VDD 0.3 650 V V KHz 180 KΩ April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 APPLICATION CIRCUIT Notes: 1. The capacitor (0.1µF) connected between the GND and the VDD pins must be located as close as possible to the PT6961 chip. 2. It is strongly suggested that the NC pin (pins 13) be connected to the GND. 3. The PT6961 power supply is separate from the application system power supply. PT6961 V1.4 - 19 - April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 COMMON CATHODE TYPE LED PANEL SE G1 SE G2 SE G3 SE G4 SE G5 SE G6 SE G7 SE G8 PT6961 V1.4 a COM/DIG ITAL (GRID) b a c d b f g e e f g c d oh h - 20 - April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 ORDER INFORMATION Valid Part Number PT6961 PT6961 (L) Package Type 32pins, SOP, 300mil 32pins, SOP, 300mil Top Code PT6961 PT6961 Notes: 1. (L), (C) or (S) = Lead Free. 2. The Lead Free mark is put in front of the date code. PT6961 V1.4 - 21 - April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 PACKAGE INFORMATION 32 PINS, SOP, 300MIL PT6961 V1.4 - 22 - April, 2006 Tel: 86-2-66296288 Fax: 86-2-29174598 URL: ttp://www.princeton.com.tw LED Driver IC PT6961 Symbols A A1 A2 b b1 b2 c c1 D E e H L α Min. 0.004 0.082 0.014 0.014 0.026 0.007 0.007 0.812 0.292 0.405 0.021 0° Nom. 0.088 0.016 0.016 0.028 0.008 0.008 0.818 0.296 0.050 bsc. 0.412 0.031 4° Max. 0.104 0.094 0.020 0.018 0.032 0.0125 0.010 0.824 0.299 0.419 0.041 8° Notes: 1. Dimensioning and tolerancing per ANSI Y14.5-1982. 2. Dimension D does not include mold flash, protrusions or gate burrs. Mold Flash, protrusion or gate burrs shall not exceed 0.15mm (0.006 in) per side. 3. Dimension E does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25 mm (0.010 in) per side. 4. The chamfer on the body is optional. It is not present, a visual index feature must be located within the crosshatched area. 5. L is the length of the terminal for soldering to a substrate. 6. The lead width B as measured 0.36 mm (0.014 in) or greater above the seating plane, shall not exceed a maximum value of 0.61 mm (0.24 in) 7. Controlling dimension: MILLIMETER. 8. N=Number of terminal position (N=32) 9. Refer to JEDEC MO-119 variation AC. JEDEC is the registered trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION. PT6961 V1.4 - 23 - April, 2006