Data Sheet
Table Of Contents
- Overview
- Features
- Applications
- Device Selection Guide
- Package Dimensions
- Absolute Maximum Ratings
- ASCII Character Set
- Recommended Operating Conditions
- Electrical Characteristics
- Optical Characteristics
- AC Timing Characteristics
- AC Timing Frequency Characteristics
- Electrical Description
- Display Internal Block Diagram
- Character RAM
- UDC RAM and UDC Address Register
- Flash RAM
- Control Word Register
- Brightness (Bits 0–2)
- Flash Function (Bit 3)
- Blink Function (Bit 4)
- Current Requirements at Different Brightness Levels (VDD = 5.0V)
- Self-Test Function (Bits 5, 6)
- Clear Function (Bit 7)
- Display Reset
- Mechanical and Electrical Considerations
- Thermal Considerations
- Ground Connections
- Thermal Resistance (θJA) Using Various Amounts of Heatsinking Material
- Soldering and Post Solder Cleaning Instructions for the HDSP-210X/- 211X/250X
- Contrast Enhancement
- Intensity Bin Limits for HDSP-2107
- Intensity Bin Limits for HDSP-211x and HDSP-250x (Except HDSP-2504)
- Intensity Bin Limit for HDSP-2504
- Color Bin Limits
- Packing Information
Broadcom AV02-0629EN
14
HDSP-210x/-211x/-250x Series Data Sheet Eight-Character 5 mm and 7 mm Smart Alphanumeric Displays
Blink Function (Bit 4)
Bit 4 of the Control Word is used to synchronize blinking of all eight digits of the display. When this bit is a 1, all eight digits
of the display blinks at approximately 2 Hz. The actual rate is dependent on the clock frequency. For an external clock, the
blink rate can be calculated by dividing the clock frequency by 28,672. This function overrides the Flash function when it is
active. To use this function with multiple display systems, see the Display Reset section.
Figure 10: Logic Levels to Access the Flash RAM
CE
FL A
4
A
3
A
2
A
1
A
0
RST WR RD
01
00
01
1
XX0
0
11
Undefined
Remove Flash at
Specified Digit Location
Store Flash at
Specified Digit Location
Control Signals
Flash RAM Address
Flash RAM Data Format
0 = Logic 0; 1 = Logic 1; X = Do Not Care
Write to Display
Read from Display
Undefined
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
X
XXXXXX
0
1
Character
Address
000 = Left most
111 = Right most