HT2040A
Functional Description
The HT2040A provides 10 different lighting
configurations. Each lighting configuration is
called a group. A group is divided into sections
(up to 8 sections maximum) where each section
contains exactly one pattern. The patterns and
the corresponding sections can be programmed
into a group from a repository of up to 23 differ-
ent patterns. The default option for the chip is
12 patterns with 10 pre-programmed groups.
MODE
Selected P in
Op en or VSS
VDD
Show
Group-5
active high
—
DK1
momentarily Demo function
active high
—
Show
Group-6
—
SK2
The groups can be individually selected by us-
ing the DK1, SK2, and K3~K6 pins, where each
pin has 2 functions that are decided by the
status of the MODE pin. All groups will be
displayed by momentarily connecting SK2 to
VDD with the MODE pin being connected to
VSS. Given this, the HT2040A provides a very
versatile and easy way of controlling lamps.
momentarily One key show
—
Show
Group-7
K3 (active high) Show Group-1
K4 (active high) Show Group-2
K5 (active high) Show Group-3
K6 (active high) Show Group-4
Show
Group-8
Show
Group-9
If the MODE pin is not connected to VDD and
power is turned on, the system will enable the
DEMO mode. But if the MODE pin is connected
to VDD, the system will show the group assign-
ment of each pin as shown in the following
table.
Show
Group-10
Group List
The available 10 groups in which the lamps can
be displayed are illustrated in the following
diagram. Each group is comprised by sections
where each section contains only one pattern.
The approximate time of each section is based
upon the 60Hz AC power frequency.
4
26th Mar ’97
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
