1. 2.3 Inch 8x8 Dot-Matrix Display
Digital Circuit Lab
TA: Po-Chen Wu

2. Outline Introduction to Dot-Matrix Display Product Specification
Circuit Connection Results

3. Introduction to Dot-Matrix Display

4. Introduction to Dot-Matrix Display
A dot-matrix display is a display device used to display information on machines, clocks and many other devices requiring a simple display device of limited resolution.

5. LED Matrix
It consists of a 2-D diode matrix with their cathodes joined in columns and their anodes joined in rows (or vice versa).
By controlling the flow of electricity through each row and column pair it is possible to control each LED individually.

6. Product Specification

7. Model No: CSM-88261EG Descriptions: 2.3Inch 8X8 Dot-Matrix Display
Dot Pitch 7.62mm
CSM-88261: Column Cathode, Row Anode
Emitting Color: Orange & Yellow Green

8. Internal Circuit Diagrams
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Pin number
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CSM-88261EG
CSM-88261EG

9. Absolute Maximum Rating (1/2)
Orange (Ta=25°C)
Parameter
Symbol
Rating
Unit
Power Dissipation Per Dice
PAD 70 mW
Continuous Forward Current Per Dice
IAF 25 mA
Peak Current Per Dice(duty cycle 1/10, 1kHz)
IPF 90
Reverse Voltage Per Dice VR 5 V

10. Absolute Maximum Rating (2/2)
Yellow Green (Ta=25°C)
Parameter
Symbol
Rating
Unit
Power Dissipation Per Dice
PAD 70 mW
Continuous Forward Current Per Dice
IAF 25 mA
Peak Current Per Dice(duty cycle 1/10, 1kHz)
IPF 90
Reverse Voltage Per Dice VR 5 V

11. Electro-optical Characteristics
Orange (Ta=25°C)
Yellow Green (Ta=25°C)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Condition
Forward Voltage Per Dot VF
2.0
2.8 V
IF = 20mA
Parameter
Symbol
Min.
Typ.
Max.
Unit
Condition
Forward Voltage Per Dot VF
2.1
2.8 V
IF = 20mA
☑ HSMC (standard 2.5 V)
☒ GPIO (standard 3.3V)
GPIO
HSMC

12. Typical Electrical / Optical Characteristics Curves
Orange
Yellow Green
(Ta=25°C)

13. Circuit Connection Results

14. HSMC的pin腳中間有安插5V, 3.3V, GND的永久腳位，因此真正能用的pin腳未達40支

16. Demo Video

17. The End.
Any question?

18. Reference http://en.wikipedia.org/wiki/Dot_matrix
"Product Specification, Model No: CSM-88261EG" by China Semiconductor Corporation,