STLED316SMTR STMicroelectronics, STLED316SMTR Datasheet

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... Home appliances ■ DVD players and VCRs Table 1. Device summary Part number STLED316SMTR January 2008 SO-24 Description The STLED316S is a compact LED controller and driver that interface microprocessors to LED displays through a serial 3-wire interface. It drives LED connected in common anode configuration. ...

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Contents Contents 1 STLED316S functional and application diagram . . . . . . . . . . . . . . . . . . 3 2 Pin description . . . . . . . . . . ...

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STLED316S 8.1 Write command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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List of figures List of figures Figure 1. STLED316S functional diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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STLED316S List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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STLED316S functional and application diagram 1 STLED316S functional and application diagram The STLED 316S consists of the following blocks: ● Current source ● POR and soft-start ● Interrupt generator ● Serial interface ● Digital logic blocks ● Drivers Figure 1. ...

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STLED316S Figure 2. STLED316S application diagram MCU STLED316S functional and application diagram 6 CLK STB STLED316S DIN / DOUT IRQ_N ISET SEG1/KS1 -SEG8/KS8 RSET KEY1-KEY2 Keyscan ( matrix) DIG2-DIG7 LED 6-digit 7-segment (+dot-point) display panel DIG1_LED 8 CS00014 ...

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Pin description 2 Pin description Figure 3. STLED316S pin connection Table 2. Pin description Pin number Symbol 1 DIN/DOUT IRQ_N 5 DIG1_LED DIG2, DIG3, 6,7,8 DIG4 9 DIG5, DIG6, 10,11,12 DIG7 8/33 Type Output serial data at ...

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STLED316S Table 2. Pin description (continued) Pin number Symbol SEG8/KS8 13,14,15,16 SEG5/KS5 17 GND SEG4/KS4 18,19,20,21 SEG1/KS1 22 KEY2 23 KEY1 24 ISET Type to OUT Segment output pins (dual function as key source). PWR Connect this pin to system ...

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STLED316S functional description 3 STLED316S functional description The STLED316S is a common-anode LED driver controller which can be used to drive red, green or blue LEDs as the current is adjustable through the external resistor. In the common anode configuration, ...

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STLED316S 3.4 Display types Table 3. Seven segment display with dot point and common-anode LED panel 3.5 Keyscan The full keyscan is illustrated in the another section of the datasheet. One diode is required per key switch. The keyscan circuit ...

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STLED316S functional description 3.8 LED drivers The constant current capability per output segment and is set for all the outputs using a single external resistor. When acting as digit drivers, the outputs source current to ...

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... These are stress ratings only and operation of the device at these or any other conditions above those indicated in the operating sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE program and other relevant quality documents. Table 4. ...

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Recommended operating conditions 5 Recommended operating conditions 5.1 DC electrical characteristics Table 6. DC electrical characteristics (T = -40 to +85 ° Symbol V Logic supply voltage CC V High level input voltage IH V Low level input ...

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STLED316S 5.2 Power consumption estimation Each port of the STLED316S can sink a maximum current into an LED with a 4.4 V forward voltage drop when operated from a supply voltage of 5.0 V. The minimum voltage ...

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Recommended operating conditions 5.5 Dynamic switching characteristics Table 9. Dynamic switching characteristics (T = -40 to +85 ° °C) Symbol f Internal oscillation frequency OSC f Clock (CLK) frequency MAX t Propagation delay PLZ t PZL 5.6 ...

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STLED316S 6 Key-scan & display cycle The display RAM stores the data transmitted from an external device to the STLED316S through the serial interface. Refer to for a pictorial representation. The grid and segment outputs are controlled by the display ...

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Key matrix and key-input data storage ram 7 Key matrix and key-input data storage ram During the key scan cycle all the grids are turned off. The first segments turn µs. The key1 and key2 signals will ...

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STLED316S 8 Commands Command sets the display mode and the status of the LED driver. The first byte input to the STLED316S through the DIN input after the STB goes low is regarded as a command. If STB is set ...

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Commands 8.2 Read command MSB 8 → LSB 3 -1 Description: MSB5 and LSB4 → MSB 6 ‘0’ auto increment address → MSB 7 ‘0’ Write command → MSB 8 ‘X’ Unused Use the page 0x01 to read the LED ...

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STLED316S address/auto increment. The address pointer will indicate the configuration location and write signal writes the configuration data into the respective location. The memory block is split into two page locations. One is for the 7-segment brightness configuration memory and ...

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Commands Table 15. LED address mapping Address 0x00 0x01 0x02 0x03 Default is constant brightness control with 14/16 pulse width. During normal operation, the user defined value will be stored in the respective location. 8.3.1 Display setting (maximum number of ...

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STLED316S 8.4 Display memory The display memory stores the display data and sends to the LED when the display is on. The address pointer, memory page and write signal indicates to this block the location to write the data. This ...

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Commands The display RAM stores the data transmitted from an external device to the STLED316S through the serial interface; addresses are as follows, in 8-bits unit: Seg1 ...

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STLED316S 9 Key-scanning and display timing During the first cycle, the 16 channels are used for the keyscan. The keyscan duration is made µs. The second cycle is used for the display of the LED (discrete). The ...

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Key-scanning and display timing 9.1 Serial communication format (reception) The figure below shows the “reception” by STLED316S for command/data write sequence. The STB must be low for 1 µs before the first and last clock rise. The minimum time the ...

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STLED316S 9.2 Serial communication format (transmission) The figure below shows the “transmission” from STLED316S for data read sequence. Figure 6. Serial communication format (transmission) STB D IN CLK Because the DIN/DOUT pin in a bi-directional pin recommended to ...

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Switching characteristics waveform 10 Switching characteristics waveform Figure 7. Switching characteristics waveform STB CLK DIN DOUT Sn/Gn 28/ CLK CLK t t SETUP HOLD t PZL t THZ 90% 10% STLED316S PW STB t CLK-STB t PLZ t ...

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STLED316S 11 Application information 11.1 Graph of ISET against RSET Figure 8. Graph of ISET against RSET Application information RSET 29/33 ...

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Application information 11.2 Power supply sequencing Proper power-supply sequencing is advised for all CMOS devices recommended to always apply V or control pins. 11.3 Application diagram Figure 9. STLED316S application diagram GND MCU DIN / ...

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STLED316S 12 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the ...

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Revision history 13 Revision history Table 21. Document revision history Date 9-Jan-2008 32/33 Revision 1 Initial release. STLED316S Changes ...

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... STLED316S Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...