Specifications

6–22 EPSON Rev. 2.1
S1D12400 Series
LB4 = 0 : DDRAM line 4 blink OFF
LB3 = 0 : DDRAM line 3 blink OFF
LB2 = 0 : DDRAM line 2 blink OFF
LB1 = 0 : DDRAM line 1 blink OFF
3. Vertical double-size display register
DD4 = 0 : Line 4 is displayed in standard form.
DD3 = 0 : Line 3 is displayed in standard form.
DD2 = 0 : Line 2 is displayed in standard form.
DD1 = 0 : Line 1 is displayed in standard form.
4. Display ON/OFF register
C = 0 : Cursor OFF
B = 0 : Blink OFF
D = 0 : Display OFF
RE = 0 : Extended register OFF
5. Power save register
O = 0 : Oscillating circuit OFF
PS = 0 : Power save OFF
6. Power control register
HPM = 0 : High power mode OFF
VC = 0 : Voltage regulating circuit OFF
VF = 0 : Voltage follower OFF
P = 0 : Boosting circuit OFF
IRS = 1 : For built-in resistor
BAS = 0 : 1/5 bias
IR1,0 = 00 : Rb/Ra = small
7. System set register
CG = 0 : CGRAM not used
CS = 0 : Left shift
SS = 0 : Normal display
R1, 0 = 0 : Standard ROM + OPTION ROM1
8. Electronic volume
(0,0,0,0,0)
9. Static icon ON/OFF control
(SEGSA, B, C, D, E, F, G, H, I, J) =
(0,0,0,0,0,0,0,0,0,0): Display OFF
10. Static icon blink control
(SEGSA, B, C, D, E, F, G, H, I, J) =
(0,0,0,0,0,0,0,0,0,0): Blink OFF
As seen in MPU Interface, the RES pin inputs data at the
same timing as MPU resetting and performs initialization
concurrently with the MPU. However, if this pin is put
into the high impedance for a certain period after the
MPU bus and ports are reset, perform a reset input after
the input to the S1D12400 series is definitively set.
For the reset signal, it is necessary to input ‘0’ level
pulses at least for 10 µs as described in DC Characteristics.
The ordinary operation will be started in 1 µs or more
after the rising edge of the RES signal. When the RES pin
becomes active, each register will be cleared and set to
the above setup status.
If initialization is not executed by the RES pin when the
supply voltage is applied, a clear disable status may
appear.
In case the built-in liquid crystal power circuit is not
used, the RES input must be active when the external
liquid crystal power supply is turned on.