Control Word 0
active. Current draw in sleep
mode is nearly zero. Data in the
Dot Register and Control Words
are retained during sleep mode.
Control Register Data Loading
Loading the Control Register with
Data is loaded into the Control
Register, MSB first, according to
the procedure shown in Table 1
and Figure 5. First, RS is brought
to logic high and then CE is
D = Logic low selects Control
7
Word 0 (see Table 2). Bits D -D
adjust the display brightness by
pulse width modulating the LED
on time, while Bits D -D adjusts
the display brightness by
0
3
Control Word 1
Loading the Control Register with
4
5
brought to logic low. Next, each
successive rising CLK edge will
D = logic high selects Control
7
changing the peak pixel current.
Word 1. This Control Word
performs two functions: serial/
simultaneous data out mode and
external oscillator prescale select
(see Table 2).
shift in the data on the D pin.
IN
Bit D selects normal operation
6
Finally, when 8 bits have been
loaded, the CE 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.
or sleep mode.
Sleep mode (Control Word 0, bit
D = Low) turns off the Internal
6
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
14
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