SED1565 Datasheet, PDF (55/87 Pages) Epson Company – Direct display of RAM data through the display data RAM

SED1565 Series
• Electronic Volume Register Set
By using this command to set six bits of data to the electronic volume register, the liquid crystal drive voltage V5 assumes
one of the 64 voltage levels.
When this command is input, the electronic volume mode is released after the electronic volume register has been set.
E R/W
A0 RD WR D7 D6 D5 D4 D3 D2 D1 D0
0 1 0 * * 000001
0 1 0 * *000010
0 1 0 * *000011
↓
0 1 0 * *111110
0 1 0 * * 111111
| V5 |
Small
↓
Large
* Inactive bit
When the electronic volume function is not used, set this to (1, 0, 0, 0, 0, 0)
• The Electronic Volume Register Set Sequence
Electronic volume mode set
Electronic volume register set
Electronic volume mode clear
No
Changes complete?
Yes
Figure 26
Static Indicator (Double Byte Command)
This command controls the static drive system indicator display. The static indicator display is controlled by this
command only, and is independent of other display control commands.
This is used when one of the static indicator liquid crystal drive electrodes is connected to the FR terminal, and the other
is connected to the FRS terminal. A different pattern is recommended for the static indicator electrodes than for the
dynamic drive electrodes. If the pattern is too close, it can result in deterioration of the liquid crystal and of the
electrodes.
The static indicator ON command is a double byte command paired with the static indicator register set command, and
thus one must execute one after the other. (The static indicator OFF command is a single byte command.)
• Static Indicator ON/OFF
When the static indicator ON command is entered, the static indicator register set command is enabled. Once the static
indicator ON command has been entered, no other command aside from the static indicator register set command can
be used. This mode is cleared when data is set in the register by the static indicator register set command.
E R/W
A0 RD WR D7 D6 D5 D4 D3 D2 D1 D0
0 1 0 10101100
1
Static Indicator
OFF
ON
EPSON
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