Specifications

S1C6S2N7 TECHNICAL HARDWARE EPSON I-7
CHAPTER 2: POWER SUPPLY AND INITIAL RESET
The LCD system regulated voltage circuit use can be prohibited by
setting the mask option. In this case, external elements can be
minimized because the external capacitors for the LCD system
regulated voltage circuit are not necessary. However when the LCD
system regulated voltage circuit is not used, the display quality of
the LCD panel, when the supply voltage fluctuates (drops), is
inferior to when the LCD system regulated voltage circuit is used.
The S1C6S2B7 always uses the the LCD system regulated voltage
circuit, therefore the external capacitors are required.
Figure 2.1.2 shows the external elements when the the LCD sys-
tem regulated voltage circuit is not used.
• S1C6S2A7
4.5 V LCD panel
1/4, 1/3, 1/2 duty, 1/3 bias
Note: VL2 is shorted to VSS inside the IC.
• S1C6S2N7/S1C6S2A7
3 V LCD panel 3 V LCD panel
1/4, 1/3, 1/2 duty, 1/3 bias 1/4, 1/3, 1/2 duty, 1/2 bias
Note: VL3 is shorted to VSS inside the IC.
VDD
VS1
VL1
VL2
VL3
CA
CB
V
SS
3 V
C5
C2
C3
C1
V DD
V S1
V L1
V L2
V L3
CA
CB
V
SS
3 V
C 5
C 2
C 1
• S1C6S2L7
3 V LCD panel
1/4, 1/3, 1/2 duty, 1/2 bias
VDD
VS1
VL1
VL2
VL3
CA
CB
VSS
3 V
C5
C2
C4
C1
VDD
VS1
VL1
VL2
VL3
CA
CB
VSS
1.5 V
C5
C4
C1
Note: VL1 is shorted to VSS inside the IC.
Fig. 2.1.2
External elements when
LCD system regulated
voltage circuit is not used