HT0610 Holtek Semiconductor Inc., HT0610 Datasheet - Page 14

• Manufacturer Part Number: HT0610
• Description: Ht0610 -- 33x120 Lcd Driver
• Manufacturer: Holtek Semiconductor Inc.

Rev. 1.10
Set Static Icon Control Signal
Set Oscillator Disable/Enable
Set Internal/External Oscillator
Set Clock Frequency
Set DC/DC Converter On/Off
Set Voltage Doubler/Tripler
Set Internal Regulator On/Off
Set Internal Voltage Divider
On/Off
Set Duty Cycle
Set Bias Ratio
Set Internal Contrast Control
On/Off
Increase/Decrease Contrast
Level
Set Contrast Level
Read Contrast Value
Set Temperature Coefficient
S e t I D D R e d u c t i o n M o d e
On/Off
Command
This command is used to control the active states of the 4 stand-alone icons driv-
ers.
This command is used to either disable or enable the oscillator. For using internal
or external oscillator, this command should be executed. The setting for this com-
mand is not affected by command ²set display on/off² and ²set static Icon control
signal². Refer to command ²set internal/external oscillator² for more information.
This command is used to select either internal or external oscillator. When internal
oscillator is selected, feedback resistor between OSC1 and OSC2 is needed. For
external oscillation circuit, feed clock input signal to OSC2 and leaves OSC1 open.
Use this command to choose from two different oscillation frequency (50kHz or
38.4kHz) to get the 60Hz frame frequency.
With frequency high, 50kHz clock frequency is preferred. 38.4kHz clock frequency
(low frequency) enable for power saving purpose.
Use this command selects the internal DC/DC converter to generate the VDDA1
from VDD. Disable the internal DC/DC converter if external VCCA1 is provided.
Use this command to choose doubler or tripler when the internal DC/DC converter
is enabled.
Choose bit option 0 to disable the internal regulator. Choose bit option 1 to enable
internal regulator, which consists of the internal contrast control and temperature
compensation circuits.
If the internal voltage divider is disabled, external bias can be used for VLL6 to
VLL2. If the internal voltage divider is enabled, the internal circuit will automatically
select the correct bias level according to the number of multiplex. Refer to com-
mand ²bias ratio select².
This command is to select 16 mux or 32 mux display. When 16 mux is enabled, the
unused 16 common outputs will be swinging between VLL2 and VLL5 for dummy
scan purpose and doubler will be used.
This command sets the 1/5 bias or 1/7 bias for the divider output.
The selection should match the characteristic of LCD panel.
This command is used to turn on or off the internal control of delta voltage of the
bias voltages. With bit option=1, the software selection for delta bias voltage con-
trol is enabled. With bit option=0, internal contrast control is disabled.
If the internal contrast control is enabled, this command is used to increase or de-
crease the contrast level within the 16 contrast levels. The contrast level starts from
lowest value after power on reset.
This command is to select one of the 16 contrast levels when internal contrast con-
trol circuitry is in use.
This command allows the user to read the current contrast level value. With RW in-
put HIGH (READ), DCOM input LOW (Command) and D7, D6, D5 and D4 are
equal to 0001, the value if the internal contrast value can be read on D0~D3 at the
falling edge of CS.
This command can select 4 different LCD driving voltage temperature coefficients
to match various liquid crystal temperature grades. Those temperature coefficients
are specified in electrical characteristics table.
By using this command to reduce the display clock frequency by HALT. Use in Icon
mode to reduce standby current
14
Description
April 4, 2007
HT0610