SSD1850 datasheet(35/56 Pages) ETC

35 / 56 page

SSD1850/51 Series

Rev 1.2

01/2003

SOLOMON

For 4 FRC,

Memory Content

FRAME

st Byte

nd Byte

Gray Mode

White

Light Gray

Dark Gray

Black

For 3 FRC,

Memory Content

FRAME

st Byte

nd Byte

Gray Mode

th (No use)

White

WD (XX)

Light Gray

LD (XX)

Dark Gray

DC (XX)

Black

BC (XX)

Set PWM and FRC

This command selects the number of frames in frame rate control, or the number of levels in the pulse

width modulation.

Set Test Mode

This command forces the driver chip into its test mode for internal testing of the chip. Under normal

operation, user should NOT use this command.

Status Register Read

This command is issued by setting D/ C Low during a data read (refer to figure 1 and 2 parallel interface

waveform, P.35-38). 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. These features are on top of general ones.

Set VL6 noise reduction

This command is to enable the VL6 noise reduction. This command is only valid for the IC version with G

prefix notation on the “DTE” (datecode) field of label printed on die tray cover, intermediates and outer

boxes. For details, please refer to the product change notification document of PC0010 from SSL.

Set Temperature Coefficient (TC) Value

This command is to set 1 out of 2 different temperature coefficients in order to match various liquid crystal

temperature grades.

Select Oscillator Source

This command enables the external clock input from CL pin.

Oscillator adjustment

This command is used to adjust the oscillator frequency to desired frame frequency.

Lock/Unlock Interface

After sending the lock command, the interface will be disabled until the unlock command is received. The

lock command is suggested whenever the LCD driver will not be accessed for some period. This can

minimize incorrect data or command written due to noisy interface.

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