Datasheet SSD1306 (Solomon Systech) - 27
| 制造商 | Solomon Systech |
| 描述 | 128 x 64, Dot Matrix OLED/PLED Segment/Common Driver with Controller |
| 页数 / 页 | 64 / 27 — 8.8 SEG/COM Driving block. Figure 8-15 : IREF Current Setting by Resistor … |
| 文件格式/大小 | PDF / 1.8 Mb |
| 文件语言 | 英语 |
8.8 SEG/COM Driving block. Figure 8-15 : IREF Current Setting by Resistor Value. SSD1306. Solomon Systech
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8.8 SEG/COM Driving block
This block is used to derive the incoming power sources into the different levels of internal use voltage and current. • VCC is the most positive voltage supply. • VCOMH is the Common deselected level. It is internally regulated. • VLSS is the ground path of the analog and panel current. • IREF is a reference current source for segment current drivers ISEG. The relationship between reference current and segment current of a color is: ISEG = Contrast / 256 x IREF x scale factor in which the contrast (0~255) is set by Set Contrast command 81h; and the scale factor is 8 by default. The magnitude of IREF is controlled by the value of resistor, which is connected between IREF pin and VSS as shown in Figure 8-15. It is recommended to set IREF to 12.5 ± 2uA so as to achieve ISEG = 100uA at maximum contrast 255.
Figure 8-15 : IREF Current Setting by Resistor Value
SSD1306 IREF (voltage at IREF ~ 12.5uA this pin = VCC – 2.5) R1 VSS Since the voltage at IREF pin is VCC – 2.5V, the value of resistor R1 can be found as below: For IREF = 12.5uA, VCC =12V: R1 = (Voltage at IREF – VSS) / IREF = (12 – 2.5) / 12.5uA = 760KΩ
SSD1306
Rev 1.5 P 27/64 Aug 2010
Solomon Systech
Document Outline 1 GENERAL DESCRIPTION 2 FEATURES 3 ORDERING INFORMATION 4 BLOCK DIAGRAM 5 DIE PAD FLOOR PLAN 6 PIN ARRANGEMENT 6.1 SSD1306TR1 pin assignment 7 PIN DESCRIPTION 8 FUNCTIONAL BLOCK DESCRIPTIONS 8.1 MCU Interface selection 8.1.1 MCU Parallel 6800-series Interface 8.1.2 MCU Parallel 8080-series Interface 8.1.3 MCU Serial Interface (4-wire SPI) 8.1.4 MCU Serial Interface (3-wire SPI) 8.1.5 MCU I2C Interface 8.1.5.1 I2C-bus Write data 8.1.5.2 Write mode for I2C 8.2 Command Decoder 8.3 Oscillator Circuit and Display Time Generator 8.4 FR synchronization 8.5 Reset Circuit 8.6 Segment Drivers / Common Drivers 8.7 Graphic Display Data RAM (GDDRAM) 8.8 SEG/COM Driving block 8.9 Power ON and OFF sequence 8.9.1 Power ON and OFF sequence with External VCC 8.9.2 Power ON and OFF sequence with Charge Pump Application 8.10 Charge Pump Regulator 9 COMMAND TABLE 9.1 Data Read / Write 10 COMMAND DESCRIPTIONS 10.1 Fundamental Command 10.1.1 Set Lower Column Start Address for Page Addressing Mode (00h~0Fh) 10.1.2 Set Higher Column Start Address for Page Addressing Mode (10h~1Fh) 10.1.3 Set Memory Addressing Mode (20h) 10.1.4 Set Column Address (21h) 10.1.5 Set Page Address (22h) 10.1.6 Set Display Start Line (40h~7Fh) 10.1.7 Set Contrast Control for BANK0 (81h) 10.1.8 Set Segment Re-map (A0h/A1h) 10.1.9 Entire Display ON (A4h/A5h) 10.1.10 Set Normal/Inverse Display (A6h/A7h) 10.1.11 Set Multiplex Ratio (A8h) 10.1.12 Set Display ON/OFF (AEh/AFh) 10.1.13 Set Page Start Address for Page Addressing Mode (B0h~B7h) 10.1.14 Set COM Output Scan Direction (C0h/C8h) 10.1.15 Set Display Offset (D3h) 10.1.16 Set Display Clock Divide Ratio/ Oscillator Frequency (D5h) 10.1.17 Set Pre-charge Period (D9h) 10.1.18 Set COM Pins Hardware Configuration (DAh) 10.1.19 Set VCOMH Deselect Level (DBh) 10.1.20 NOP (E3h) 10.1.21 Status register Read 10.1.22 Charge Pump Setting (8Dh) 10.2 Graphic Acceleration Command 10.2.1 Horizontal Scroll Setup (26h/27h) 10.2.2 Continuous Vertical and Horizontal Scroll Setup (29h/2Ah) 10.2.3 Deactivate Scroll (2Eh) 10.2.4 Activate Scroll (2Fh) 10.2.5 Set Vertical Scroll Area(A3h) 10.3 Advance Graphic Command 10.3.1 Set Fade Out and Blinking (23h) 10.3.2 Set Zoom In (D6h) 11 MAXIMUM RATINGS 12 DC CHARACTERISTICS 13 AC CHARACTERISTICS 14 Application Example 15 PACKAGE INFORMATION 15.1 SSD1306TR1 Detail Dimension 15.2 SSD1306Z2 Die Tray Information
8.8 SEG/COM Driving block
This block is used to derive the incoming power sources into the different levels of internal use voltage and current. • VCC is the most positive voltage supply. • VCOMH is the Common deselected level. It is internally regulated. • VLSS is the ground path of the analog and panel current. • IREF is a reference current source for segment current drivers ISEG. The relationship between reference current and segment current of a color is: ISEG = Contrast / 256 x IREF x scale factor in which the contrast (0~255) is set by Set Contrast command 81h; and the scale factor is 8 by default. The magnitude of IREF is controlled by the value of resistor, which is connected between IREF pin and VSS as shown in Figure 8-15. It is recommended to set IREF to 12.5 ± 2uA so as to achieve ISEG = 100uA at maximum contrast 255.
Figure 8-15 : IREF Current Setting by Resistor Value
SSD1306 IREF (voltage at IREF ~ 12.5uA this pin = VCC – 2.5) R1 VSS Since the voltage at IREF pin is VCC – 2.5V, the value of resistor R1 can be found as below: For IREF = 12.5uA, VCC =12V: R1 = (Voltage at IREF – VSS) / IREF = (12 – 2.5) / 12.5uA = 760KΩ
SSD1306
Rev 1.5 P 27/64 Aug 2010
Solomon Systech
Document Outline 1 GENERAL DESCRIPTION 2 FEATURES 3 ORDERING INFORMATION 4 BLOCK DIAGRAM 5 DIE PAD FLOOR PLAN 6 PIN ARRANGEMENT 6.1 SSD1306TR1 pin assignment 7 PIN DESCRIPTION 8 FUNCTIONAL BLOCK DESCRIPTIONS 8.1 MCU Interface selection 8.1.1 MCU Parallel 6800-series Interface 8.1.2 MCU Parallel 8080-series Interface 8.1.3 MCU Serial Interface (4-wire SPI) 8.1.4 MCU Serial Interface (3-wire SPI) 8.1.5 MCU I2C Interface 8.1.5.1 I2C-bus Write data 8.1.5.2 Write mode for I2C 8.2 Command Decoder 8.3 Oscillator Circuit and Display Time Generator 8.4 FR synchronization 8.5 Reset Circuit 8.6 Segment Drivers / Common Drivers 8.7 Graphic Display Data RAM (GDDRAM) 8.8 SEG/COM Driving block 8.9 Power ON and OFF sequence 8.9.1 Power ON and OFF sequence with External VCC 8.9.2 Power ON and OFF sequence with Charge Pump Application 8.10 Charge Pump Regulator 9 COMMAND TABLE 9.1 Data Read / Write 10 COMMAND DESCRIPTIONS 10.1 Fundamental Command 10.1.1 Set Lower Column Start Address for Page Addressing Mode (00h~0Fh) 10.1.2 Set Higher Column Start Address for Page Addressing Mode (10h~1Fh) 10.1.3 Set Memory Addressing Mode (20h) 10.1.4 Set Column Address (21h) 10.1.5 Set Page Address (22h) 10.1.6 Set Display Start Line (40h~7Fh) 10.1.7 Set Contrast Control for BANK0 (81h) 10.1.8 Set Segment Re-map (A0h/A1h) 10.1.9 Entire Display ON (A4h/A5h) 10.1.10 Set Normal/Inverse Display (A6h/A7h) 10.1.11 Set Multiplex Ratio (A8h) 10.1.12 Set Display ON/OFF (AEh/AFh) 10.1.13 Set Page Start Address for Page Addressing Mode (B0h~B7h) 10.1.14 Set COM Output Scan Direction (C0h/C8h) 10.1.15 Set Display Offset (D3h) 10.1.16 Set Display Clock Divide Ratio/ Oscillator Frequency (D5h) 10.1.17 Set Pre-charge Period (D9h) 10.1.18 Set COM Pins Hardware Configuration (DAh) 10.1.19 Set VCOMH Deselect Level (DBh) 10.1.20 NOP (E3h) 10.1.21 Status register Read 10.1.22 Charge Pump Setting (8Dh) 10.2 Graphic Acceleration Command 10.2.1 Horizontal Scroll Setup (26h/27h) 10.2.2 Continuous Vertical and Horizontal Scroll Setup (29h/2Ah) 10.2.3 Deactivate Scroll (2Eh) 10.2.4 Activate Scroll (2Fh) 10.2.5 Set Vertical Scroll Area(A3h) 10.3 Advance Graphic Command 10.3.1 Set Fade Out and Blinking (23h) 10.3.2 Set Zoom In (D6h) 11 MAXIMUM RATINGS 12 DC CHARACTERISTICS 13 AC CHARACTERISTICS 14 Application Example 15 PACKAGE INFORMATION 15.1 SSD1306TR1 Detail Dimension 15.2 SSD1306Z2 Die Tray Information