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Table 1. Device summary
1 STLED316S functional and application diagram
Figure 1. STLED316S functional diagram
Figure 2. STLED316S application diagram
2 Pin description
Figure 3. STLED316S pin connection
Table 2. Pin description
3 STLED316S functional description
3.1 Low power mode of operation
3.2 Serial interface
3.3 Initial power up
3.4 Display types
Table 3. Seven segment display with dot point and common-anode LED panel
3.5 Keyscan
3.6 Discrete LED outputs
3.7 Power on reset and soft-start
3.8 LED drivers
3.9 Interrupt
3.10 Operating the device with 3.3 V interface voltages
4 Maximum rating
Table 4. Absolute maximum ratings (all voltages are referenced to GND)
4.1 Thermal data
Table 5. Thermal data
5 Recommended operating conditions
5.1 DC electrical characteristics
Table 6. DC electrical characteristics (TA = -40 to +85 C, VCC = 5.0 V ± 10%, GND = 0 V)
5.2 Power consumption estimation
5.3 Capacitance
Table 7. Capacitance (TA = 25 C, f = 1 MHz)
5.4 Power supply characteristics
Table 8. Power supply characteristics (TA = -40 to +85 C)
5.5 Dynamic switching characteristics
Table 9. Dynamic switching characteristics (TA = -40 to +85 C, VCC = 5.0 V ± 10%, GND = 0.0 V, typical values are at 25 C)
5.6 Timing characteristics
Table 10. Timing characteristics (TA = -40 to +85 C, VCC = 5.0 V ± 10%, GND = 0.0 V, Typical values are at 25 C)
5.7 ESD performance
Table 11. ESD performance
6 Key-scan & display cycle
7 Key matrix and key-input data storage ram
Figure 4. Key matrix
8 Commands
8.1 Write command
8.2 Read command
Table 12. Read command
8.3 Device configuration
Table 13. Memory page mapping
Table 14. Digit address mapping
Table 15. LED address mapping
8.3.1 Display setting (maximum number of digits):
8.3.2 Dimming setting (brightness levels):
8.4 Display memory
Table 16. Memory page address
Table 17. 7-segment display address
Table 18. LED display address
9 Key-scanning and display timing
9.1 Serial communication format (reception)
Figure 5. Serial communication format (reception)
9.2 Serial communication format (transmission)
Figure 6. Serial communication format (transmission)
10 Switching characteristics waveform
Figure 7. Switching characteristics waveform
11 Application information
11.1 Graph of ISET against RSET
Figure 8. Graph of ISET against RSET
11.2 Power supply sequencing
11.3 Application diagram
Figure 9. STLED316S application diagram
Table 19. Part list
12 Package mechanical data
Figure 10. SO-24 package outline
Table 20. SO-24 package mechanical data
13 Revision history
Table 21. Document revision history
STLED316S 带按键扫描的串行接口6位LED控制器 Features ■ LED driver with 14 outputs (8 segments/6 digits) ■ 40 mA load current capability for each segment ■ Output pins connected directly to the LEDs or can be open-drain ■ Key-scanning (8 x 2 matrix) ■ Low power consumption in standby mode ■ 3-wire serial bus interface (CLK, STB, DIN/DOUT) ■ 8-step dimming circuit to control the overall display brightness ■ Single external resistor for output current setting ■ Inputs with Schmitt trigger give superior noise immunity ■ A single LED digit output (DIG1_LED) can be used to drive up to 8 discrete LEDs ■ 8-step dimming circuit to control brightness of individual LEDs for LED digit ■ 5.0 V (± 10%) for VCC ■ Drives common-anode LED digits ■ Built-in power on reset and soft-start circuits ■ Available in SO24 package ■ -40 °C to 85 °C operating temperature range Applications ■ Set-top-boxes ■ White goods ■ Home appliances ■ DVD players and VCRs Table 1. Device summary Part number STLED316SMTR January 2008 SO-24 Description STEDL316S是一种紧凑的LED控制器和驱动器, 通过串行3线接口将微处理器与LED显示器接口。 它驱动LED连接在共同阳极配置。STEDL316S驱 动多达48个分立LED在8段/ 6位配置,同时从5.0V 的电源电压运行。此外,它可以用来驱动8个离散 LED,形成了LED数字的一部分。单个LED被连接 成数字段,这些LED的亮度可以通过数字控制。显 示数字的最大段电流通过单个外部电阻器设置。 可以在不重写整个显示器的情况下寻址和更新单 个数字。 此外,它包括对8x2密钥矩阵的密钥扫描,该矩阵 自动扫描多达16个开关的矩阵。STEDID316S支 持数值型显示器,通过高集成度降低整体BOM成 本。此外,它提供了大于4千伏HBM的ESD保护。 LED控制器/驱动器是一种理想的外围设备,用于 将显示器与单片机连接。 Package SO-24 Rev 1 Packaging Tape and reel 1/33 www.st.com 33
Contents Contents STLED316S STLED316S functional and application diagram . . . . . . . . . . . . . . . . . . 3 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 STLED316S functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Low power mode of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.1 Serial interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.2 Initial power up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.3 3.4 Display types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Keyscan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.5 3.6 Discrete LED outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Power on reset and soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.7 LED drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.8 3.9 Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.10 Operating the device with 3.3 V interface voltages . . . . . . . . . . . . . . . . . . 9 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4.1 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 11 DC electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.1 5.2 Power consumption estimation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.3 Power supply characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.4 5.5 Dynamic switching characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Timing characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.6 5.7 ESD performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Key-scan & display cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Key matrix and key-input data storage ram . . . . . . . . . . . . . . . . . . . . . 15 Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 1 2 3 4 5 6 7 8 2/33
STLED316S Contents 8.1 Write command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Read command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 8.2 8.3 Device configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Display setting (maximum number of digits): . . . . . . . . . . . . . . . . . . . . . 19 8.3.1 8.3.2 Dimming setting (brightness levels): . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Display memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 8.4 Key-scanning and display timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Serial communication format (reception) . . . . . . . . . . . . . . . . . . . . . . . . . 23 9.1 9.2 Serial communication format (transmission) . . . . . . . . . . . . . . . . . . . . . . 24 Switching characteristics waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 11.1 Graph of ISET against RSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 11.2 Power supply sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 11.3 Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 9 10 11 12 13 3/33
List of figures List of figures STLED316S STLED316S functional diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 1. STLED316S application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2. STLED316S pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 3. Key matrix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 4. Serial communication format (reception) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 5. Serial communication format (transmission). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 6. Switching characteristics waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 7. Graph of ISET against RSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Figure 8. Figure 9. STLED316S application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Figure 10. SO-24 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 4/33
STLED316S List of tables List of tables Table 7. Table 8. Table 9. Table 10. Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Seven segment display with dot point and common-anode LED panel . . . . . . . . . . . . . . . 11 Absolute maximum ratings (all voltages are referenced to GND). . . . . . . . . . . . . . . . . . . . 13 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 DC electrical characteristics (TA = -40 to +85 °C, VCC = 5.0 V ± 10%, GND = 0 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Capacitance (TA = 25 °C, f = 1 MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Power supply characteristics (TA = -40 to +85 °C). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Dynamic switching characteristics (TA = -40 to +85 °C, VCC = 5.0 V ± 10%, GND = 0.0 V, typical values are at 25 °C) . . . . 16 Timing characteristics (TA = -40 to +85 °C, VCC = 5.0 V ± 10%, GND = 0.0 V, Typical values are at 25 °C) . . . . 16 ESD performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 11. Table 12. Read command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table 13. Memory page mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Table 14. Digit address mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Table 15. LED address mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Table 16. Memory page address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 7-segment display address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Table 17. Table 18. LED display address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Part list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Table 19. SO-24 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Table 20. Table 21. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 5/33
STLED316S functional and application diagram STLED316S 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. STLED316S 功能图 ISET 电流源 输出段 VCC 电源 & 软启动 内部重置 中断生成 IRQ_N DIN/DOUT CLK STB 串行 I/F 内部时钟 发生器 KEY1-KEY2 2 命令解码器 显示内存 (7 x 8) 时钟生成 按键扫描和调光 Keydata记忆 (2 x 8) SEG1/KS1 SEG8/KS8 DIG1_LED DIG7 DIG2 8位 输出 锁存 器 7位移 位寄存 器 8 7 VCC (+5.0 V) GND (0 V) 6/33
STLED316S STLED316S functional and application diagram Figure 2. STLED316S 应用图 6 DIG2-DIG7 DIG1_LED LED 6位7段(+点)显示面板 8 SEG1/KS1 -SEG8/KS8 MCU DIN / DOUT IRQ_N CLK STB ISET STLED316S RSET KEY1-KEY2 按键矩阵 (8 x 2 ) CS00014 7/33
Pin description 2 引脚说明 Figure 3. STLED316S引脚连接 STLED316S Table 2. 引脚说明 Pin number Symbol Type 名称和功能 1 2 3 4 5 DIN/DOUT IN/OUT CLK STB IN IN 输出串行数据在下降沿的移位时钟,从较低的位开 始。输入串行数据是时钟在上升沿的移位时钟,从较 低的位开始。 在上升沿读取串行数据,并在下降沿输出数据。 在上升沿或下降沿初始化串行接口,使STEED316S等 待命令的接收。STB下降沿后的数据输入作为命令进 行处理。在处理命令数据时,停止当前处理,并初始 化串行接口。当STB高时,指令被忽略。 IRQ_N OUT DIG1_LED OUT 中断输出(低电平)在有按键时中断MCU 单输出LED与8个段一起驱动多达8个离散LED 6,7,8 DIG2, DIG3, DIG4 OUT 数字输出引脚. 9 VCC PWR 5伏±10%芯主电源电压。绕过GND通过0.1μF电容器尽 可能靠近引脚. 10,11,12 DIG5, DIG6, DIG7 OUT 数字输出引脚. 8/33
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