SSD1815BT ETC1 [List of Unclassifed Manufacturers], SSD1815BT Datasheet - Page 20

• Manufacturer Part Number: SSD1815BT
• Description: LCD Segment / Common Driver with Controller
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

Set Read-Modify-Write Mode
which:
loading when a very portion of display area is being updated fre-
quently.
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.
Mode” is sent to restore the column address and ready for next
update sequence.
Software Reset
status registers to be initialized:
Set End of Read-Modify-Write Mode
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
the M and MSTAT pins.
command byte “Indicator Display Mode” must be followed. How-
ever, the “Set Indicator Off” command is a single byte command
and no second byte command is required.
mode or sleep mode will be entered, after issuing the power
save compound command. See “Set Power Save Mode” later in
this section.
NOP
Set Test Mode
ternal testing of the chip. Under normal operation, users should
NOT apply this command.
SOLOMON
This command puts the chip in read-modify-write mode in
1. column address is saved before entering the mode
2. column address is increased only after display data write
This Ready-Modify-Write mode is used to save the MCU’s
As reading the data will not change the column address, it
After updating the area, “Set End of Read-Modify-Write
Issuing this command causes some of the chip’s internal
This command relieves the chip from read-modify-write
This command turns on or off the static indicator driven by
When the “Set Indicator On” command is sent, the second
The status of static indicator also controls whether standby
A command causing the chip takes No OPeration.
This command force the driver chip into its test mode for in-
but not after display data read.
• 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 Power Save Mode
compound command composed of “Set Display ON/OFF” and
“Set Entire Display ON/OFF” commands. When “Set Entire Dis-
play ON” is issued when display is OFF, either Standby Mode or
Sleep Mode will be entered.
save mode is entered. If static indicator is off, the Sleep Mode
will be entered:
which is similar to sleep mode except addition with:
ware 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
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.
EXTENDED COMMANDS
to trigger the enhanced features designed for the chip.
Set Multiplex Ratio
plex mode from 2 to the maximum multiplex ratio (POR value),
including the icon line. Max. mux ratio: 65
sponding COM signal output, see Table 8 on page 21 for exam-
ples of 18 multiplex (including icon line) settings without and with
7 lines display offset for SSD1815B.
ratio, the bias ratio may also need to be adjusted to make display
contrast consistent.
Entering Standby or Sleep Mode should be done by using a
The status of the Static Indicator will determine which power
If the static indicator is on, the chip enters Standby Mode
Please also be noted that during Standby Mode, if the soft-
This command is issued by pulling D/C Low during a data
No status read is provided for serial mode.
These commands are used, in addition to basic commands,
This command switches default multiplex ratio to any multi-
It should be noted that after changing the display multiplex
• Internal oscillator and LCD power supply circuits
• Segment and Common drivers output V
• The display data and operation mode before
• Internal display RAM can still be accessed
• Internal oscillator is on
• Static drive system is on
The chip pins ROW0-ROW63 will be switched to corre-
are stopped
sleep are held
07/2002
Rev1.6
DD
SSD1815B
level
21