User`s manual

7: POWER CONSUMPTION
APPLICATION NOTES (S19A-G-005-05) EPSON 5-53
7.1.1 Conditions
The Table 7-1 “S1D13504 Total Power Consumption” below gives an example of a particular envi-
ronment and its effects on power consumption.
Note: ∗1. Conditions for Software SUSPEND:
• CPU interface active (signals toggling)
• CLKI active (6MHz)
• Self-Refresh DRAM
∗2.Conditions for Hardware SUSPEND:
• CPU interface inactive (high impedance)
• CLKI stopped
• Self-Refresh DRAM
7.2 Summary
The system design variables in Section 7.1, “S1D13504 Power Consumption” and in Table 7-1
“S1D13504 Total Power Consumption” show that S1D13504 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 S1D13504 can be configured to be an extremely power-efficient
LCD Controller with high performance and flexibility.
Table 7-1 S1D13504 Total Power Consumption
Test Condition
Core VDD = 3.3V, IO VDD = 5.0V
ISA Bus (8MHz)
Gray Shades / Colors
Total Power Consumption
Active
Power Save Mode
Software Hardware
1 Input Clock = 6MHz
LCD Panel Connected = 320x240 Monochrome
Black-and-White
4 Grays
16 Grays
38.7mW
43.9mW
46.8mW
20mW
∗1
7.59µW
∗2
2 Input Clock = 6MHz
LCD Panel Connected = 320x240 Color
4 Colors
16 Colors
256 Colors
44.4mW
49.7mW
51.2mW
20mW
∗1
7.59µW
∗2
3 Input Clock = 25MHz
LCD Panel Connected = 640x480 Monochrome
Black-and-White
16 Grays
113.3mW
124.6mW
24mW
∗1
7.59µW
∗2
4 Input Clock = 25MHz
LCD Panel Connected = 640x480 Color
16 Colors
256 Colors
64K Colors
145.6mW
150.6mW
150.0mW
24mW
∗1
7.59µW
∗2