SSD1815B is a single-chip CMOS LCD drivers with controllers for dot-matrix graphic liquid crystal display system.
SSD1815B is capable to drive 132 Segments, 64 Commons and 1 icon line by its 197 high voltage driving output.
SSD1815B display data directly from their internal 132 x 65 bits Graphic Display Data RAM (GDDRAM). Data/Commands
are sent from common MCU through 8-bit Parallel or Serial Interface. The selection of whether 6800- or 8080-series compatible
Parallel Interface or Serial Peripheral Interface is done by hardware pins configuration.
SSD1815B embeds a DC-DC Converter, an On-Chip Bias Divider and an On-Chip Oscillator which reduce the number of
external components. With the advanced design on minimizing power consumption and die/package layout, SSD1815B is suitable for any portable battery-driven applications requiring a long operation period with a compact size.
This document contains information on a new product. Specifications and information herein and subject to change without notice.
This alignment mark contains gold bump for IC
bumping process alignment and IC identifications. No conductive tracks should be laid underneath this mark to avoid short circuit.
Note:
1. This diagram showing Die Face Up view.
2. Coordinates and Size of all alignment marks
are in unit um and w.r.t. center of the chip.
Die Size:10.977mm X 1.912mm
Die Thickness: 550 +/-25um
Bump Pitch:76.2 um [Min]
Bump Height:Nominal 18um
This pin is the static indicator driving output. It is only active
in master operation. The frame signal output pin, M, should be
used as the back plane signal for the static indicator.
The duration of overlapping could be programmable. See
Extended Command Table for details.
This pin becomes high impedance if the chip is operating in
slave mode.
M
This pin is the frame signal input/output. In master mode,
the pin supplies frame signal to slave devices while in slave
mode, the pin receives frame signal from the master device.
E(RD)
This pin is MCU interface input. When interfacing to an
6800-series microprocessor, this pin will be used as the Enable
(E) signal. Read/write operation is initiated when this pin is
pulled high when the chip is selected.
When connecting to an 8080-microprocessor, this pin receives the Read (RD) signal. Data read operation is initiated
when this pin is pulled low when the chip is selected.
D7-D
0
These pins are the 8-bit bi-directional data bus to be connected to the MCU in parallel interface mode. D7 is the MSB
while D0 is the LSB.
When serial mode is selected, D7 is the serial data input
(SDA) and D6 is the serial clock input (SCK).
CL
This pin is the display clock input/output. In master mode
with internal oscillator enabled (CLS pin pulled high), this pin
supplies display clock signal to slave devices.
In slave mode or when internal oscillator is disabled, the pin
receives display clock signal from the master device or external
clock source.
DOF
This pin is display blanking control between master and
slave devices. In master mode, this pin supplies on/off signal to
slave devices. In slave mode, this pin receives on/off signal from
the master device.
CS1, CS2
These pins are the chip select inputs. The chip is enabled
for MCU communication only when both CS1 is pulled low and
CS2 is pulled high.
RES
This pin is reset signal input. Initialization of the chip is started once this pin is pulled low. Minimum pulse width for completing the reset procedure is 5us.
D/C
This pin is Data/Command control pin. When the pin is
pulled high, the data at D7-D0 is treated as display data. When
the pin is pulled low, the data at D7-D0 will be transferred to the
command register. Details relationship with other MCU interface
signals, please refer to the Timing Characteristics Diagrams.
R/W(WR)
This pin is MCU interface input. When interfacing to an
6800-series microprocessor, this pin will be used as Read/Write
(R/W) selection input. Read mode will be carried out when this
pin is pulled high and write mode when low.
When interfacing to an 8080-microprocessor, this pin will be
the Write (WR) input. Data write operation is initiated when this
pin is pulled low when the chip is selected.
V
DD
Chip’s Power Supply pin. This is also the reference for the
DC-DC Converter output and LCD driving voltages.
V
SS
Ground. A reference for the logic pins.
V
SS1
Input for internal DC-DC converter. The voltage of generated, VEE, equals to the multiple factor times the potential different
between this pin, V
4X, is selected by different connections of the external capacitors. All voltage levels are referenced to VDD.
Note: the potential at this input pin must lower than or equal
to VSS.
V
EE
This is the most negative voltage supply pin of the chip. It
can be supplied externally or generated by the internal DC-DC
converter, by turning on the internal voltage booster option in
the Set Power Control Register command.
When using internal DC-DC converter as generator, voltage
at this pin is for internal reference only. It CANNOT be used for
driving external circuitries.
C3N, C1P, C1N, C2N and C
When internal DC-DC voltage converter is used, external
capacitor(s) is/are connected between these pins. Different connection will result in different DC-DC converter multiple factor,
2X, 3X or 4X. Detail connections please refer to voltage converter section in the functional block description.
V
FS
This is an input pin to provide an external voltage reference
for the internal voltage regulator. The function of this pin is only
enabled for the External Input chip models which are required
special ordering. For normal chip model, please leave this pin
NC (No connection).
, and VDD. The multiple factor, 2X, 3X or
SS1
2P
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VL2, VL3, VL4 and V
These are the LCD driving voltage levels. All these levels
are referenced to VDD.
They can be supplied externally or generated by the internal
bias divider, by turning on the output op-amp buffers option in
the Set Power Control Register command.
The potential relation of these pins are given as:
This pin is the most negative LCD driving voltage. It can be
supplied externally or generated by turning on the internal reg-
ulator option in the Set Power Control Register command.
L5
L6
HPM
This pin is the control input of High Power Current Mode.
The function of this pin is only enabled for High Power model
which required special ordering.
For normal models, High Power Mode is disabled and the
LCD driving characteristics are the same no matter this pin is
pulled High or Low.
Note: This pin must be pulled to either High or Low. Leaving
this pin floating is prohibited.
IRS
This is the input pin to enable the internal resistors network
for the voltage regulator. When this pin is pulled high, the internal
feedback resistors of the internal regulator for generating VL6 will
be enabled.
When it is pulled low, external resistors, R1 and R2, should
be connected to VDD and VF, and VF and VL6, respectively (see
application circuit diagrams).
V
F
This pin is the input of the built-in voltage regulator for gen-
erating VL6.
When external resistor network is selected (IRS pulled low)
to generate the LCD driving level, VL6, two external resistors, R
and R2, should be connected between VDD and VF, and VF and
VL6, respectively (see application circuit diagrams).
M/S
This pin is the master/slave mode selection input. When this
pin is pulled high, master mode is selected, which CL, M,
MSTAT and DOF signals will be output for slave devices.
When this pin is pulled low, slave mode is selected, which
CL, M, DOF are required to be input from master device and
MSTAT is high impedance.
CLS
This pin is the internal clock enable pin. When this pin is
pulled high, internal clock is enabled.
The internal clock will be disabled when it is pulled low, an
external clock source must be input to CL pin for normal operation.
C68/80
This pin is MCU parallel interface selection input. When the
pin is pulled high, 6800 series interface is selected and when the
pin is pulled low, 8080 series interface is selected.
If Serial Interface is selected (P/S pulled low), the setting of
this pin is ignored, but must be connected to a known logic (either high or low).
ROW0 - ROW63
These pins provide the Common driving signals to the LCD
panel. See Table 3 on page 10 for the COM signal mapping in
SSD1815B.
1
SEG0 - SEG131
These pins provide the LCD segment driving signals. The
output voltage level of these pins is VDD during sleep mode and
standby mode.
ICONS
There are two ICONS pins (pin12 and 136) on the chip. Both
pins output exactly the same signal. The reason for duplicating
the pin is to enhance the flexibility of the LCD layout.
NC
These are the No Connection pins. Nothing should be connected to these pins, nor they are connected together. These
pins should be left open individually.
P/S
This pin is serial/parallel interface selection input. When this
pin is pulled high, parallel interface mode is selected. When it is
pulled low, serial interface will be selected.
Note1: For serial mode, D0, D1, D2, D3, D4, D5, R/W/
(WR), E/(RD) is recommended to be connected to Vss.
Note2: Read Back operation is only available in parallel
mode.
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Table 3 ROW pin assignments for COM signals for SSD1815B .
This module determines whether the input data is interpreted as data or command. Data is directed to this module based
upon the input of the D/C pin.
If D/C pin is high, data is written to Graphic Display Data
RAM (GDDRAM). If it low, the input at D7-D0 is interpreted as a
Command and it will be decoded and be written to the corresponding command register.
MPU Parallel 6800-series Interface
The parallel interface consists of 8 bi-directional data pins
(D7-D0), R/W(WR), D/C, E(RD), CS1 and CS2. R/W(WR) input
high indicates a read operation from the Graphic Display Data
RAM (GDDRAM) or the status register. R/W(WR) input Low indicates a write operation to Display Data RAM or Internal Command Registers depending on the status of D/C input. The
E(RD) input serves as data latch signal (clock) when high provided that CS1 and CS2 are low and high respectively. Refer to Figure 11 on page 27 for Parallel Interface Timing Diagram of 6800series microprocessors.
In order to match the operating frequency of the GDDRAM
with that of the MCU, some pipeline processing is internally performed which requires the insertion of a dummy read before the
first actual display data read. This is shown in Figure 3.
MPU Parallel 8080-series interface
The parallel interface consists of 8 bi-directional data pins
(D7-D0), E(RD), R/W(WR), D/C, CS1 and CS2. E(RD) input
serves as data read latch signal (clock) when low provided that
CS1 and CS2 are low and high respectively. Whether it is display
data or status register read is controlled by D/ C. R/W(WR) input
serves as data write latch signal(clock) when high provided that
CS1 and CS2 are low and high respectively. Whether it is display
data or command register write is controlled by D/C. Refer to
Figure 12 on page 28 for Parallel Interface Timing Diagram of
8080-series microprocessor.
Similar to 6800-series interface, a dummy read is also required before the first actual display data read.
MPU Serial interface
The serial interface consists of serial clock SCK (D6), serial
data SDA (D7), D/ C, CS1 and CS2. SDA is shifted into a 8-bit
shift register on every rising edge of SCK in the order of D7, D6,...
D0. D/ C is sampled on every eighth clock to determine whether
the data byte in the shift register is written to the Display Data
RAM or command register at the same clock. Refer to Figure 13
on Page28 for Serial Interface Timing Diagram.
R/W(WR)
E(RD)
data bus
Nn
write column addressdummy read
Figure 3 Display Data Read Back Procedure - Insertion of Dummy Read
n+1n+2
data read1data read 2
data read 3
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Oscillator Circuit
This module is an On-Chip low power RC oscillator circuitry (Figure 4). The oscillator generates the clock for the DC-DC
voltage converter. This clock is also used in the Display Timing Generator.
Oscillator enable
(CLS)
enable
Oscillation Circuit
Internal resistor
OSC1OSC2
Figure 4 Oscillator Circuitry
enable
Buffer
(CL)
LCD Driving Voltage Generator and Regulator
This module generates the LCD voltage required for
display driving output. With reference to VDD, it takes a single supply input, VSS, and generate necessary voltage levels. This block consists of:
1. 2X, 3X and 4X DC-DC voltage converter
The built-in DC-DC voltage converter is used to generate the large negative voltage supply with reference to VDD
from the voltage input (VSS1). SSD1815B is possible to
produce 2X, 3X or 4X boosting from the potential different
between V
SS1
- VDD.
Detail configurations of the DC-DC converter for different boosting multiples are given in Figure 5.
2. Voltage Regulator (Voltages referenced to VDD)
The feedback gain control for LCD driving contrast
curves can be selected by IRS pin to either internal (IRS pin
= H) or external (IRS pin = L).
If internal resistor network is enabled, eight settings
can be selected through software command.
If external control is selected, external resistors are required to be connected between VDD and VF (R1), and between VF and VL6 (R2). See application circuit diagrams for
detail connections.
V
V
SS1
EE
+
C1C1
2X Boosting Configuration
V
V
SS1
EE
+
C1C1
3X Boosting Configuration
V
SS1
V
EE
SSD1815B
C
3NC1PC1NC2PC2N
+
SSD1815B
C
3NC1PC1NC2PC2N
+
+
C1
SSD1815B
C
3NC1PC1NC2PC2N
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+
C1C1
C1
+
+
4X Boosting Configuration
Remarks:
1. C1 = 0.47 - 1.0uF
2. Boosting input from V
3. V
should be lower potential than or equal to V
SS1
4. All voltages are referenced to V
SS1
.
DD
Figure 5 DC-DC Converter Configurations
+
C1
SS
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3. Contrast Control (Voltages referenced to VDD)
1
R
+
Software control of the 64 contrast voltage levels at each voltage regulator feedback gain. The equation of calculating the LCD driving
Figure 6 Voltage Regulator Output for Different Gain/Contrast Settings
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4. Bias Divider
If the output op-amp buffer option in Set Power Control Register command is enabled, this circuit block will divide the regulator output (VL6) to give the LCD driving levels (VL2 - VL5).
A low power consumption circuit design in this bias divider
saves most of the display current comparing to traditional design.
Stablizing Capacitors (0.01~0.47uF) are required to be connected between these voltage level pins (VL2 - VL5) and VDD. If
the LCD panel loading is heavy, four additional resistors are suggested to add to the application circuit as follows:
SSD1815B
V
DD
V
V
L2
L3
V
L4
V
L5
V
L6
given by:
• Display is turned OFF
• Default Display Display Mode, 132 x 64 + 1 Icon
Line
• Normal segment and display data column address
mapping (Seg0 mapped to Row address 00h)
• Read-modify-write mode is OFF
• Power control register is set to 000b
• Shift register data clear in serial interface
• Bias ratio is set to default, 1/9
• Static indicator is turned OFF
• Display start line is set to GDDRAM column 0
• Column address counter is set to 00h
• Page address is set to 0
• Normal scan direction of the COM outputs
• Contrast control register is set to 20h
• Test mode is turned OFF
• Temperature Coefficient is set to TC0
R3R1
R4
+
V
DD
Remark: 1. C1 ~ C5 = 0.01 ~ 0.47uF
2. R1 ~ R4 = 100k~ 1MΩ
C5
+
C4
R2
+
C3
+
C2
+
C1
Figure 7 Connections for heavy loading applications
5. Bias Ratio Selection circuitry
SSD1815B can be software selected one of the bias ratios
from 1/4, 1/5, 1/6, 1/7, 1/8 and 1/9.
Since there will be slightly different in command pattern for
different members, please refer to Command Descriptions section of this data sheet.
6. Self adjust temperature compensation circuitry
This block provides 4 different compensation settings to satisfy various liquid crystal temperature grades by software control. Default temperature coefficient (TC) setting is TC0.
Graphic Display Data RAM (GDDRAM)
The GDDRAM is a bit mapped static RAM holding the bit
pattern to be displayed. The size of the RAM is 132 x 65 = 8580
bits. Figure 8 on page 15 is a description of the GDDRAM address map.
For mechanical flexibility, re-mapping on both Segment and
Common outputs can be selected by software.
For vertical scrolling of the display, an internal register storing display start line can be set to control the portion of the RAM
data to be mapped to the display. Figure 8 on page 15 shows the
case in which the display start line register is set to 38h.
For those GDDRAM out of the display common range, they
could still be accessed, for either preparation of vertical scrolling
data or even for the system usage.
Note: Please find more explanation in the Applications Note attached at the back of the specification.
Display Data Latch
This block is a series of latches carrying the display signal
information. These latches hold the data, which will be fed to the
HV Buffer Cell and Level Selector to output the required voltage
level.
The numbers of latches are given by: 132 + 65 = 197
HV Buffer Cell (Level Shifter)
HV Buffer Cell work as a level shifter which translates the
low voltage output signal to the required driving voltage. The output is shifted out with an internal FRM clock which comes from
the Display Timing Generator. The voltage levels are given by
the level selector which is synchronized with the internal M signal.
Level Selector
Level Selector is a control of the display synchronization.
Display voltage levels can be separated into two sets and used
with different cycles. Synchronization is important since it selects the required LCD voltage level to the HV Buffer Cell, which
in turn outputs the COM or SEG LCD waveform.
LCD Panel Driving Waveform
Figure 9 on page 16 is an example of how the Common and
Segment drivers may be connected to a LCD panel. The waveforms provided illustrates the desired multiplex scheme.
Reset Circuit
This block includes Power On Reset circuitry and the hardware reset pin, RES. Both of these having the same reset function. Once RES receives a negative reset pulse, all internal
circuitry will start to initialize. Minimum pulse width for completing the reset sequence is 5us. Status of the chip after reset is
Set Lower Column AddressSet the lower nibble of the column address register using X3X2X1X0 as data
bits. The lower nibble of column address register is reset to 0000b after POR.
Set Higher Column AddressSet the higher nibble of the column address register using X3X2X1X0 as data
bits. The higher nibble of column address is reset to 0000b after POR.
Set Internal Regulator Resistor RatioFeedback gain of the internal regulator generating VL6 increases as X2X1X0
increased from 000b to 111b.
After POR, X2X1X0 = 100b.
Set Power Control RegisterX0=0: turns off the output op-amp buffer (POR)
X0=1: turns on the output op-amp buffer
X1=0: turns off the internal regulator (POR)
X1=1: turns on the internal regulator
X2=0: turns off the internal voltage booster (POR)
X2=1: turns on the internal voltage booster
0
Set Display Start LineSet GDDRAM display start line register from 0-63 using X5X4X3X2X1X0.
Display start line register is reset to 000000 after POR.
Set Contrast Control RegisterSelect contrast level from 64 contrast steps. Contrast increases (VL6
0
decreases) as X5X4X3X2X1X0 is increased from 000000b to 111111b.
X5X4X3X2X1X0 = 100000b after POR
Set Segment Re-mapX0=0: column address 00h is mapped to SEG0 (POR)
X0=1: column address 83h is mapped to SEG0
Refer to Figure 8 on page 15 for example.
Set LCD BiasX0=0: POR default bias: 1/9
X0=1: alternate bias: 1/7
For other bias ratio settings, see “Set 1/4 Bias Ratio” and “Set Bias Ratio” in
Extended Command Set.
1010010X
0
Set Entire Display On/OffX0=0: normal display (POR)
X0=1: entire display on
1010011X
1010111X
0
0
Set Normal/Reverse DisplayX0=0: normal display (POR)
X0=1: reverse display
Set Display On/OffX0=0: turns off LCD panel (POR)
X0=1: turns on LCD panel
1011X3X2X1X
0
Set Page AddressSet GDDRAM Page Address (0-8) for read/write using X3X2X1X
0
1100X3 * * *Set COM Output Scan DirectionX3=0: normal mode (POR)
X3=1: remapped mode, COM0 to COM[N-1] becomes COM[N-1] to COM0
when Multiplex ratio is equal to N.
See Figure 8 on page 15 for detail mapping.
11100000Set Read-Modify-Write ModeRead-Modify-Write mode will be entered in which the column address will not
be increased during display data read. After POR, Read-modify-write mode is
turned OFF.
11100010Software Reset Initialize internal status registers.
11101110Set End of Read-Modify-Write ModeExit Read-Modify-Write mode. RAM Column address before entering the
mode will be restored. After POR, Read-modify-write mode is OFF.
11100011NOPCommand result in No Operation
11110000Test Mode ResetReserved for IC testing. Do NOT use.
1111 * * * *Set Test ModeReserved for IC testing. Do NOT use.
* * * * * * * *Set Power Save Mode
0
0
Set Indicator On/Off
Indicator Display Mode,
This second byte command is
required ONLY when “Set Indicator
On” command is sent.
(Standby or Sleep)
X0 = 0: indicator off (POR, second command byte is not required)
X0 = 1: indicator on (second command byte required)
X1X0 = 00: indicator off
X1X0 = 01: indicator on and blinking at ~1 second interval
X1X0 = 10: indicator on and blinking at ~1/2 second interval
X1X0 = 11: indicator on constantly
Standby or sleep mode will be entered using compound commands.
Issue compound commands “Set Display Off” followed by “Set Entire Display
On”.
Table 5 Extended Command Table
Bit PatternCommandDescription
10101000
00X5X4X3X2X1X
10101001
X7X6X5X4X3X2X1X
0
0
Set Multiplex RatioTo select multiplex ratio N from 2 to the maximum multiplex ratio (POR value)
Set Bias Ratio (X1X0)
for each member (including icon line).
Max. mux ratio: 65
N = X5X4X3X2X1X0 + 2, eg. N = 001111b + 2 = 17
X1X0 = 00011011
1/8 or 1/61/6 or 1/5 1/9 or 1/7 (POR) Prohibited
1010101X
11010100
00X5X40000
11010011
00X5X4X3X2X1X
0
X4X3X2 = 000: -0.01%/ºC (TC0, POR)
X4X3X2 = 010: -0.15%/ºC (TC2)
X4X3X2 = 100: -0.20%/ºC (TC4)
Set TC Value (X4X3X2)
Modify Osc. Freq. (X7X6X5)
Set 1/4 Bias RatioX0 = 0: use normal setting (POR)
Set Total Frame PhasesThe On/Off of the Static Icon is given by 3 phases/1 phase overlapping of the
Set Display OffsetAfter POR, X5X4X3X2X1X0 = 0
0
X4X3X2 = 111: -0.30%/ºC (TC7)
X4X3X2 = 001, 011, 101, 110: Reserved
Increase the value of X7X6X5 will increase the oscillator frequency and vice
versa.
Default Mode:
X7X6X5 = 011 (POR for SSD1815B) : Typ. 19kHz
High Frequency Mode:
X7X6X5 = 110 (For SSD1815B) : Typ. 23kHz
X0 = 1: fixed at 1/4 bias
M and MSTAT signals. This command set total phases of the M/MSTAT sig-
nals for each frame.
The more the total phases, the less the overlapping time and thus the lower
the effective driving voltage.
X5X4 = 00: 3 phases
X5X4 = 01: 5 phases
X5X4 = 10: 7 phases (POR)
X5X4 = 11: 16 phases
After setting mux ratio less than default value, data will be displayed at Center
of matrix.
To move display towards Row 0 by L, X5X4X3X2X1X0 = L
To move display away from Row 0 by L, X5X4X3X2X1X0 = 64-L
Note: max. value of L = (POR default mux ratio - display mux)/2
Note: Patterns other than that given in Command Table and Extended Command Table are prohibited to enter to the chip as a command. Otherwise,
unexpected result will occurs.
0
Status Register ReadD7=0:indicates the driver is ready for command.
D7=1:indicates the driver is Busy.
D6=0:indicates reverse segment mapping with column address.
D6=1:indicates normal segment mapping with column address.
D5=0:indicates the display is ON.
D5=1:indicates the display is OFF.
D4=0:initialization is completed.
D4=1:initialization process is in progress after RES or software reset.
D3D2D1D0 = 0010, these 4-bit is fixed to 0010 which could be used to identify
as Solomon Systech Device.
Data Read / Write
To read data from the GDDRAM, input High to R/ W(WR) pin and D/C pin for 6800-series parallel mode, Low to E(RD) pin and High
to D/ C pin for 8080-series parallel mode. No data read is provided in serial interface mode.
In normal data read mode, GDDRAM column address pointer will be increased by one automatically after each data read. However,
no automatic increase will be performed in read-modify-write mode.
Also, a dummy read is required before first valid data is read. See Figure 3 on page 11 in Functional Block Descriptions section for
detail waveform diagram.
To write data to the GDDRAM, input Low to R/W(WR) pin and High to D/C pin for both 6800-series and 8080-series parallel mode.
For serial interface mode, it is always in write mode. GDDRAM column address pointer will be increased by one automatically after each
data write.
It should be noted that, after the automatic column address increment, the pointer will NOT wrap round to 0 when overflow (>131).
The incrementation of the pointer stops at 131. Therefore there is a need to re-initialize the pointer when progress to another page address.
*1. If read data is issued in read-modify-write mode, address will not be increased automatically.
Auto Address
Increment
*1
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COMMAND DESCRIPTIONS
Set Lower Column Address
This command specifies the lower nibble of the 8-bit column
address of the display data RAM. The column address will be increased by each data access after it is pre-set by the MCU.
Set Higher Column Address
This command specifies the higher nibble of the 8-bit column address of the display data RAM. The column address will
be increased by each data access after it is pre-set by the MCU.
Set Internal Regulator Resistors Ratio
This command is to enable any one of the eight internal resistor sets for different regulator gain when using internal regulator resistor network (IRS pin pulled high). In other words, this
command is used to select which contrast curve from the eight
possible selections. Please refer to Functional Block Descriptions section for detail calculation of the LCD driving voltage.
Set Power Control Register
This command turns on/off the various power circuits associated with the chip. There are three power relating sub-circuits
could be turned on/off by this command.
Internal voltage booster is used to generated the large negative voltage supply (VEE) from the voltage input (V
An external negative power supply is required if this option is
turned off.
Internal regulator is used to generate the LCD driving voltage. VL6, from the negative power supply, VEE.
Output op-amp buffer is the internal divider for dividing the
different voltage levels (VL2, VL3, VL4, VL5) from the internal regulator output, VL6. External voltage sources should be fed into
this driver if this circuit is turned off.
SS1
- VDD).
Set LCD Bias
This command is used to select a suitable bias ratio re-
quired for driving the particular LCD panel in use.
The selectable values of this command are 1/9 or 1/7.
For other bias ratio settings, extended commands should be
used.
Set Entire Display On/Off
This command forces the entire display, including the icon
row, to be illuminated regardless of the contents of the GDDRAM. In addition, this command has higher priority than the
normal/reverse display.
This command is used together with “Set Display Display
ON/OFF” command to form a compound command for entering
power save mode. See “Set Power Save Mode” later in this section.
Set Normal/Reverse Display
This command turns the display to be either normal or reversed. In normal display, a RAM data of 1 indicates an illumination on the corresponding pixel, while in reversed display, a RAM
data of 0 will turn on the pixel.
It should be noted that the icon line will not affect, that is not
be reversed, by this command.
Set Display On/Off
This command is used to turn the display on or off. When
display off is issued with entire display is on, power save mode
will be entered. See “Set Power Save Mode” later in this section
for details.
Set Page Address
This command enters the page address from 0 to 8 to the
RAM pager register for read/write operations. Please refer to
Figure 8 on page 15 for detail mapping.
Set Display Start Line
This command is to set Display Start Line register to determine starting address of display RAM to be displayed by selecting a value from 0 to 63. With value equals to 0, D0 of Page 0 is
mapped to COM0. With value equals to 1, D1 of Page0 is
mapped to COM0 and so on. Display start line values of 0 to 63
are assigned to Page 0 to 7.
Please refer to Figure 8 on page 15 as an example for display start line set to 56 (38h).
Set Contrast Control Register
This command adjusts the contrast of the LCD panel by
changing the LCD drive voltage, VL6, provided by the On-Chip
power circuits. VL6 is set with 64 steps (6-bit) in the contrast control register by a compound commands.
See Figure 10 for the contrast control flow.
Set Segment Re-map
This command changes the mapping between the display
data column addresses and segment drivers. It allows flexibility
in mechanical layout of LCD glass design. Please refer to Figure
8 on page 15 for example.
Set COM Output Scan Direction
This command sets the scan direction of the COM output allowing layout flexibility in LCD module assembly. See Figure 8
on page 15 for the relationship between turning on or off of this
feature.
In addition, the display will have immediate effect once this
command is issued. That is, if this command is sent during normal display, the graphic display will have vertical flipping effect.
Set Contrast Control Register
Contrast Level Data
No
Figure 10 Contrast Control Flow
Changes
Complete?
Yes
SSD1815B Rev 1.6
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SOLOMON
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Set Read-Modify-Write Mode
This command puts the chip in read-modify-write mode in
which:
1. column address is saved before entering the mode
2. column address is increased only after display data write
but not after display data read.
This Ready-Modify-Write mode is used to save the MCU’s
loading when a very portion of display area is being updated frequently.
As reading the data will not change the column address, it
could be get back from the chip and do some operation in the
MCU. Then the updated data could be write back to the GDDRAM with automatic address increment.
After updating the area, “Set End of Read-Modify-Write
Mode” is sent to restore the column address and ready for next
update sequence.
Software Reset
Issuing this command causes some of the chip’s internal
status registers to be initialized:
• Read-Modify-Write mode is exited
• Static indicator is turned OFF
• Display start line register is cleared to 0
• Column address counter is cleared to 0
• Page address is cleared to 0
• Normal scan direction of the COM outputs
• Internal regulator resistors Ratio is set to 4
• Contrast control register is set to 20h
Set End of Read-Modify-Write Mode
This command relieves the chip from read-modify-write
mode. The column address before entering read-modify-write
mode will be restored no matter how much modification during
the read-modify-write mode.
Set Indicator On/Off
This command turns on or off the static indicator driven by
the M and MSTAT pins.
When the “Set Indicator On” command is sent, the second
command byte “Indicator Display Mode” must be followed. However, the “Set Indicator Off” command is a single byte command
and no second byte command is required.
The status of static indicator also controls whether standby
mode or sleep mode will be entered, after issuing the power
save compound command. See “Set Power Save Mode” later in
this section.
NOP
A command causing the chip takes No OPeration.
Set Power Save Mode
Entering Standby or Sleep Mode should be done by using a
compound command composed of “Set Display ON/OFF” and
“Set Entire Display ON/OFF” commands. When “Set Entire Display ON” is issued when display is OFF, either Standby Mode or
Sleep Mode will be entered.
The status of the Static Indicator will determine which power
save mode is entered. If static indicator is off, the Sleep Mode
will be entered:
• Internal oscillator and LCD power supply circuits
are stopped
• Segment and Common drivers output VDD level
• The display data and operation mode before
sleep are held
• Internal display RAM can still be accessed
If the static indicator is on, the chip enters Standby Mode
which is similar to sleep mode except addition with:
• Internal oscillator is on
• Static drive system is on
Please also be noted that during Standby Mode, if the software reset command is issued, Sleep Mode will be entered. Both
power save modes can be exited by the issue of a new software
command or by pulling Low at hardware pin RES.
Status register Read
This command is issued by pulling D/ C Low during a data
read (refer to Figure 11 on page 27 and Figure 12 on page 28 for
parallel interface waveforms). It allows the MCU to monitor the
internal status of the chip.
No status read is provided for serial mode.
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 21 for examples of 18 multiplex (including icon line) settings without and with
7 lines display offset for SSD1815B.
It should be noted that after changing the display multiplex
ratio, the bias ratio may also need to be adjusted to make display
contrast consistent.
Set Test Mode
This command force the driver chip into its test mode for internal testing of the chip. Under normal operation, users should
NOT apply this command.
SOLOMON
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Page 21
Table 8 Row pin assignments for COM signals in 18 mux display (including icon line) with/without 7 line display offset towards
Note: X - Row pin will output non-selected COM signal.
SSD1815B Rev 1.6
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Page 22
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 5 on page 18.
Set Temperature Coefficient (TC) Value
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
5 on page 18, for detail 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 Total Frame Phases
The total number of phases for one display frame is set by
this command.
The Static Icon is generated by the overlapping of the M and
MSTAT signals. These two pins output either VSS or VDD at
same frequency but with phase different.
To turn on the Static Icon, 3 phases overlapping is applied
to these signals, while 1 phase overlapping is given to the Off
status.
The more the total number of phases in one frame, the less
the overlapping time and thus the lower the effective driving voltage at the Static Icon on the LCD panel.
Set Display Offset
This command should be sent ONLY when the multiplex ratio is set less than SSD1815B’s default value.
When a lesser multiplex ratio is set, the display will be
mapped in the middle (y-direction) of the LCD, see the no offset
columns on Table 8 on page 21. Use this command could move
the display vertically within the 64 commons.
To make the Reduced-Mux Com 0 (Com 0 after reducing
the multiplex ratio) towards the Row 0 direction for L lines, the 6bit data in second command should be given by L. An example
for 7 line moving towards to Com0 direction is given on Table 8
on page 21.
To move in the other direction by L lines, the 6-bit data
should be given by 64-L.
Please note that the display confined within SSD1815B’s
default multiplex value. That is the maximum value of L is given
by the half of the default value minus the reduced-multiplex ratio.
For an odd display mux after reduction, moving away from Row
0 direction will has 1 more step.
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MAXIMUM RATINGS
Table 9 Maximum Ratings* (Voltage Reference to VSS)
SymbolParameterValueUnit
V
DD
V
V
T
T
Supply Voltage-0.3 to +4.0V
EE
Input VoltageVSS-0.3 to
in
ICurrent Drain Per Pin Excluding VDD and V
Operating Temperature-30 to +85°C
A
Storage Temperature Range-65 to +150°C
stg
SS
0 to -12.0V
V
VDD+0.3
25mA
This device contains circuitry to protect the inputs
against damage due to high static voltages or electric fields; however, it is advised that normal precautions to be taken to avoid application of any voltage
higher than maximum rated voltages to this high
impedance circuit. For proper operation it is recommended that Vin and V
range VSS < or = (Vin or V
be constrained to the
out
) < or = VDD. Reliability
out
of operation is enhanced if unused input are connected to an appropriate logic voltage level (e.g.,
either VSS or VDD). Unused outputs must be left
open. This device may be light sensitive. Caution
should be taken to avoid exposure of this device to
any light source during normal operation. This
device is not radiation protected.
* Maximum Ratings are those values beyond which damage to the device may occur. Func-
tional operation should be restricted to the limits in the Electrical Characteristics tables or
Pin Description section.
DC CHARACTERISTICS
Table 10 DC Characteristics (Unless otherwise specified, Voltage Referenced to VSS, VDD = 2.4 to 3.5V, TA = -30 to 85°C.)
SymbolParameterTest ConditionMinTypMaxUnit
V
DD
I
AC
Logic Circuit Supply Voltage RangeRecommend Operating Voltage
Possible Operating Voltage
Access Mode Supply Current Drain
(VDD Pins)
V
= 2.7V, Voltage Generator On, 4X
DD
DC-DC Converter Enabled, Write accessing, T
=3.3MHz, Typ. Osc. Freq., Dis-
cyc
2.4
1.8
2.7
-
-
300
3.5
3.5
600
V
V
µ A
play On, no panel attached.
I
DP1
Display Mode Supply Current Drain
(VDD Pins)
V
= 2.7V, V
DD
= -8.1V, Voltage Genera-
EE
tor Disabled, R/W(WR) Halt, Typ. Osc.
-
60
100
µ A
Freq., Display On, VL6 - VDD = -9V, no
panel attached.
I
DP2
Display Mode Supply Current Drain
(VDD Pins)
V
= 2.7V, V
DD
= -8.1V, Voltage Genera-
EE
tor On, 4x DC-DC Converter Enabled, R/
-
150
200
µ A
W(WR) Halt, Typ. Osc. Freq., Display On,
VL6 - VDD = -9V, no panel attached.
Table 14 Serial Interface Timing Characteristics (VDD - VSS = 2.4 to 3.5V, TA = -30 to 85°C)
SymbolParameterMinTypMaxUnit
t
cycle
t
t
t
CSS
t
CSH
t
DSW
t
DHW
t
CLKL
t
CLKH
t
AS
AH
t
Clock Cycle Time250--ns
Address Setup Time150--ns
Address Hold Time150--ns
Chip Select Setup Time (for D7 input)120--ns
Chip Select Hold Time (for D0 input)60--ns
Write Data Setup Time100--ns
Write Data Hold Time100--ns
Clock Low Time100--ns
Clock High Time100--ns
Rise Time--15ns
Pins connected to VDD: CS2, RD, M/S, CLS, C68/80, P/S, HPM
Pins connected to VSS: V
Pins floating: DOF, CL, V
SS1
FS
Figure 15 Application Circuit of 132 x 64 plus 2 icon lines using SSD1815B, configured with all internal power control circuit
enabled, 6800-series MPU parallel interface, internal oscillator and master mode.
SOLOMON
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SSD1815B
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APPENDIX A - TAB INFORMATION
SSD1815B Rev 1.6
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Figure 16 SSD1815BT TAB Drawing 1/2
SOLOMON
Page 32
Copper View Pin Assignment
Figure 17 SSD1815BT TAB Drawing 2/2
SOLOMON
Rev1.6
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SSD1815B
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Page 33
Figure 18 SSD1815BT2 TAB Drawing 1/2
SSD1815B Rev 1.6
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Page 34
Internal Connections:
VDD: CS2, M/S
VSS: V
SS1
Figure 19 SSD1815BT2 TAB Drawing 2/2
SOLOMON
Rev1.6
07/2002
SSD1815B
35
Page 35
APPENDIX B - TAB WHEEL INFORMATION
A
CORE DIA. 25.8mm
KEYWAY = 4.2mm
MATERIAL: HIGH IMPACT POLYSTYRENE (HIPS)
SURFACE RESISTIVITY: 1 X 10 OHM MIN
TAPE LENGTH = 20m
5
9
1 X 10 OHM MAX
3.5mm
330mm
W2
SECTION AAA
35mm TAB48mm TAB70mm TAB
50±0.2 mm37±0.2 mm70±0.2 mm W2
SSD1815B Rev 1.6
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07/2002
Figure 20 TAB Wheel Mechanical Drawing
SOLOMON
Page 36
Solomon Systech reserves the right to make changes without further notice to any products herein. Solomon Systech makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Solomon Systech assume any liability arising out of the application or use of any
product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters can and do
vary in different applications. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts.
Solomon Systech does not convey any license under its patent rights nor the rights of others. Solomon Systech products are not designed, intended, or authorized
for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in
which the failure of the Solomon Systech product could create a situation where personal injury or death may occur. Should Buyer purchase or use Solomon Systech products for any such unintended or unauthorized application, Buyer shall indemnify and hold Solomon Systech and its offices, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of
personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Solomon Systech was negligent regarding the design
or manufacture of the part.
SSD1815B
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