SSD1810 View Datasheet(PDF) - Solomon Systech

Part Name

Description

Manufacturer

SSD1810

LCD Segment / Common Driver with Controller

Solomon Systech  

Command Description

Set Lower Column Address

This command specifies the lower nibble of the 8-bit col-

umn 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 col-

umn 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 Power Control Register

This command turns on/off the various power circuits as-

sociated with the chip. There are three power relating sub-cir-

cuits 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 (VSS -

VDD). An external negative power supply is required if this op-

tion is turned off.

Internal regulator is used to generate the LCD driving volt-

age. 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 inter-

nal regulator output, VL6. External voltage sources should be

fed into this driver if this circuit is turned off.

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 32 steps (5-bit) in the contrast

control register by a compound commands.

Set Segment Re-map

This command changes the mapping between the display

data column addresses and segment drivers. It allows flexibil-

ity in mechanical layout of LCD glass design. Please refer to

Figure 8 on page 16 for example.

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 is 1/6 or 1/5.

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 selected regardless of the contents of the GD-

DRAM. In addition, this command has higher priority than the

normal/inverse display.

This command is used together with “Set Display Display

ON/OFF” command to form a compound command for enter-

ing power save mode. See “Set Power Save Mode” later in

this section.

Set Normal/Inverse Display

This command turns the display to be either normal or in-

versed. In normal display, RAM data of 1 indicates an illumina-

tion on the corresponding pixel, while in inversed display, 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 16.

Set COM Output Scan Direction

This command sets the scan direction of the COM output al-

lowing layout flexibility in LCD module assembly. See Figure 8

on page 16 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 nor-

mal display, the graphic display will have vertical flipping effect.

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 fre-

quently.

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 GD-

DRAM 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:

• Static indicator is OFF

• Vertical scroll register is set at zero

• Column address counter is set at zero

• Page address is set at zero

• Normal scan direction of the COM outputs

• Contrast control register is set at zero

• Test mode is OFF

SOLOMON

REV 1.1

05/01

SSD1810/A

21

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