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Epson Research and Development
Vancouver Design Center
S1D13505 Power Consumption
X23A-G-006-03 Issue Date: 01/02/05
1.1 Conditions
Table 1-1: “S1D13505 Total Power Consumption” below gives an example of a specific
environment and its effects on power consumption.
Note
1. Conditions for Software SUSPEND:
• CPU interface active (signals toggling)
• CLKI active
• Self-Refresh DRAM
2. Conditions for Hardware SUSPEND:
• CPU interface inactive (high impedance)
• CLKI stopped
• Self-Refresh DRAM
2 Summary
The system design variables in Section 1, “S1D13505 Power Consumption” and in Table 1-1:
“S1D13505 Total Power Consumption” show that S1D13505 power consumption depends on the
specific implementation. Active Mode power consumption depends on the desired CPU perfor-
mance and LCD frame-rate, whereas Power Save Mode consumption depends on the CPU Interface
and Input Clock state.
In a typical design environment, the S1D13505 can be configured to be an extremely power-efficient
LCD Controller with high performance and flexibility.
Table 1-1: S1D13505 Total Power Consumption
Test Condition
V
DD
= 3.3V
ISA Bus (8MHz)
Gray Shades /
Colors
Total Power Consumption
Active
Power Save Mode
Software Hardware
1
Input Clock = 6MHz
LCD Panel = 320x240 4-bit Single Monochrome
Black-and-White
4 Gray Shades
16 Gray Shades
18.6mW
20.3mW
22.8mW
4.29mW
1
0.33
µ
W
2
2
Input Clock = 6MHz
LCD Panel = 320x240 8-bit Single Color
4 Colors
16 Colors
256 Colors
22.3mW
25.3mW
29.0mW
4.32mW
1
0.33
µ
W
2
3
Input Clock = 25MHz
LCD Panel = 640x480 8-bit Dual Monochrome
Black-and-White
16 Gray Shades
58.5mW
71.7mW
5.71mW
1
0.33
µ
W
2
4
Input Clock = 25MHz
LCD Panel = 640x480 16-bit Dual Color
16 Colors
256 Colors
64K Colors
93.4mW
98.1mW
101.3mW
5.74mW
1
0.33
µ
W
2
5
Input Clock = 33.333MHz
CRT = 640x480 Color
16 Colors
256 Colors
64K Colors
221.1mW
234.0mW
237.3mW
6.34mW
1
0.33
µ
W
2