S6A0092 Datasheet, PDF (21/54 Pages) Samsung semiconductor – 80 SEG / 26 COM DRIVER & CONTROLLER FOR STN LCD

80 COM / 26 COM DRIVER & CONTROLLER FOR STN LCD
S6A0092
LOW POWER CONSUMPTION MODE
S6A0092 provides with sleep mode for saving power consumption during standby period.
Sleep Mode (Power Save Bit ON, Oscillation Bit OFF)
To enter the sleep mode, the power circuit and oscillation circuit should be turned off by using the power save
command and the power control command. This mode helps to save power consumption by reducing current to
reset level.
1. Liquid Crystal Display Output
COM1 ~ COM24, COMI1, COMI2: VSS level
SEG1 ~ SEG80: VSS level
2. Data written in DDRAM, CGRAM, ICONRAM and registers are remained as previous value.
3. Operation mode is retained the same as it was prior to execution of the sleep mode.
All internal circuits are stopped.
4. Power Circuit and Oscillation Circuit
The built-in power supply circuit and oscillation circuit are turned off by power save command and
power control command.
LCD DRIVER CIRCUIT
LCD Driver circuit has 26 common and 80 segment signals for driving LCD. Data from ICONRAM / CGRAM /
CGROM are transferred to 80-bit segment register serially, and then they are stored to 80-bit shift latch. In case of
2-line display mode, COM1 ~ COM16, COMI1 and COMI2 have 1/17 duty, and in 3-line mode, COM1 ~ COM24,
COMI1 and COMI2 have 1/25 duty ratio. SEG bi-directional function is selected by DIRS input pin, and COM shift
direction is selected by function set instruction "S" bit.
DIRS pin
Low
High
Table 8. SEG Data Shift Direction
SEG data shift direction
SEG1 → SEG2 → SEG3
.... ……………………. ............. SEG78 → SEG79 → SEG80
SEG80 → SEG79 → SEG78 ....... …………………........... SEG3 → SEG2 → SEG1
Line
mode
2-line
mode
3-line
mode
S
0 (left)
1 (right)
0 (left)
1 (right)
Table 9. COM Data Shift Direction
COM data shift direction
COM1 → COM2 ...... ………….... COM15 → COM16 → COMI1 (COMI2)
COMI1 (COMI2) → COM16 → COM15 .... ………….. ...... COM2 → COM1
COM1 → COM2 ... …………....... COM23 → COM24 → COMI1 (COMI2)
COMI1 (COMI2) → COM24 → COM23 ..... ………… …. .. COM2 → COM1
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