HCMS-2914 Avago Technologies US Inc., HCMS-2914 Datasheet - Page 9

• Manufacturer Part Number: HCMS-2914
• Description: LED DISPLAY 5X7 8CHAR 3.8MM ORN
• Manufacturer: Avago Technologies US Inc.
• Series: HCMS-29xxr

Specifications of HCMS-2914

• Millicandela Rating: *
• Size / Dimension: 1.40" L x 0.40" W x 0.20" H (35.6mm x 10.2mm x 5.1mm)
• Color: Orange
• Configuration: 5 x 7
• Voltage - Forward (vf) Typ: *
• Package / Case: 26-DIP
• Display Type: Alphanumeric
• Number Of Digits/alpha: 8
• Digit/alpha Size: 0.15" (3.8mm)
• Character Format: Dot Matrix
• Character Size: 3.81mm
• Led Color: Orange
• Luminous Intensity: 64µcd
• No. Of Digits / Alpha: 8
• Display Area Width: 35.56mm
• Display Area Height: 10.16mm
• Number Of Digits: 8
• Illumination Color: Orange
• Wavelength: 600 nm
• Operating Voltage: - 0.3 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Common Pin: -
• Lead Free Status / Rohs Status: Details

HCMS-29xx Write Cycle Diagram
Control Register
The Control Register allows software modification of the
IC’s operation and consists of two independent 7-bit
control words. Bit D
the two 7-bit control words. Control Word 0 performs
pulse width modulation brightness control, peak pixel
current brightness control, and sleep mode. Control Word
1 sets serial/simultaneous data out mode, and external
oscillator prescaler. Each function is independent of
the others.
Control Register Data Loading
Data is loaded into the Control Register, MSB first, ac-
cording to the procedure shown in Table 1 and the
Write Cycle Timing Diagram. First, RS is brought to logic
high and then CE is brought to logic low. Next, each
successive rising CLK edge will shift in the data on the
D
line is brought to logic high. When CLK goes to logic
low, new data is copied into the selected control word.
Loading data into the Control Register takes place while
the previous control word configures the display.
9
(SIMULTANEOUS)
IN
LED OUTPUTS,
D
pin. Finally, when 8 bits have been loaded, the CE
OUT
REGISTERS
CONTROL
(SERIAL)
D
CLK
OUT
D
CE
RS
IN
NOTE:
1. DATA IS COPIED TO THE CONTROL REGISTER OR THE DOT LATCH AND LED OUTPUTS WHEN CE IS HIGH AND CLK IS LOW.
T
CLKCE
T
3
RSS
1
7
in the shift register selects one of
T
T
CEDO
RSH
10
2
T
CES
4
T
DOUTP
9
T
DS
6
T
T
DOUT
DH
7
8
T
CLKH
11
PREVIOUS DATA
T
CLKL
12
Control Word 0
Loading the Control Register with D
lects Control Word 0 (see Table 2). Bits D
display brightness by pulse width modulating the LED
on-time, while Bits D
by changing the peak pixel current. Bit D
operation or sleep mode.
Sleep mode (Control Word 0, bit D
Internal Display Oscillator and the LED pixel drivers. This
mode is used when the IC needs to be powered up, but
does not need to be active. Current draw in sleep mode
is nearly zero. Data in the Dot Register and Control Words
are retained during sleep mode.
4
-D
5
adjust the display brightness
T
CEH
5
NEW DATA LATCHED HERE
6
= Low) turns off the
7
= Logic low se-
6
0
selects normal
-D
3
adjust the
NEW DATA
[1]