參數(shù)資料
型號(hào)： SSD1818AZ
廠商： Electronic Theatre Controls, Inc.
英文描述： LCD Segment / Common Driver with Controller
中文描述： LCD段/驅(qū)動(dòng)器與控制器通用
文件頁(yè)數(shù)： 31/47頁(yè)
文件大?。?/td> 642K
代理商： SSD1818AZ
SSD1818A
Rev 1.2
P 31/47 Mar 2004
Solomon Systech
EXTENDED COMMANDS
These commands are used, in addition to basic commands, to trigger the enhanced features designed for
the chip.
Set Multiplex Ratio
This command switches default multiplex ratio to any multiplex mode from 2 to the maximum multiplex
ratio (POR value), including the icon line. Max. MUX ratio: 65
The chip pins ROW0-ROW63 will be switched to corresponding COM signal output, see Table 8 on Page
33 for examples of 18 multiplex (including icon line) settings with and without 7 lines display offset for
different MUX.
It should be noted that after changing the display multiplex ratio, the bias ratio might also need to be
adjusted to make display contrast consistent.
Set Bias Ratio
Except the 1/4 bias, all other available bias ratios could be selected using this command plus the “Set
LCD Bias” command.
For detail setting values and POR default, please refer to the extended command table, Table 6 on Page
25.
Set Temperature Coefficient (TC) Value
One out of 4 different temperature coefficient settings is selected by this command in order to match
various liquid crystal temperature grades. Please refer to the extended command table, Table 6 on Page
25, for detailed TC values.
Modify Oscillator Frequency
The oscillator frequency can be fine tuned by applying this command. Since the oscillator frequency will
be affected by some other factors, this command is not recommended for general usage. Please contact
SOLOMON Systech Limited application engineers for more detail explanation on this command.
Set 1/4 Bias Ratio
This command sets the bias ratio directly to 1/4. This bias ratio is especially designed for use in under 12
MUX display.
In order to restore to other bias ratio, this command must be executed, with LSB=0, before the “Set
Multiplex ratio” or “Set LCD Bias” command is sent.
Set Smart Icon Mode
The smart icon mode is designed for the low power application. This command is used to enable the
smart icon mode.
Set Phases of Smart Icon Mode
The contrast level of the smart icon is controlled by 4 phases. The more the total phases, the shorter
overlap time and thus the lower effective driving voltage. As a result, the contrast level of the smart icon
will be lower.
Change of this smart icon mode phases will not affect the total frame phases of the static icon. They are
independent commands.
Set Total Frame Phases of Static Icon
The total number of phases for one display frame is set by this command.
The overlapping of the M and MSTAT signals generates the Static Icon. These two pins output either V
SS
or V
DD
at same frequency but with phase different.
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