S1D13705 Epson Electronics America, Inc., S1D13705 Datasheet - Page 317

• Manufacturer Part Number: S1D13705
• Description: S1d13705 Embedded Memory Lcd Controller
• Manufacturer: Epson Electronics America, Inc.

Epson Research and Development
Vancouver Design Center
1 S1D13705 Power Consumption
Power Consumption
Issue Date: 01/02/13
Note
S1D13705 power consumption is affected by many system design variables.
• Input clock frequency (CLKI): the CLKI frequency and the internal clock divide register deter-
• CPU interface: the S1D13705 current consumption depends on the BUSCLK frequency, data
• V
• Display mode: the resolution, panel type, and color depth affect power consumption. The higher
There are two power save modes in the S1D13705: Software and Hardware Power Save. The power
consumption of these modes is affected by various system design variables.
• CPU bus state during Power Save: the state of the CPU bus signals during Power Save has a
• CLKI state during Power Save: disabling the CLKI during Power Save has substantial power
mine the operating clock (CLK) frequency of the S1D13705. The higher CLK is, the higher the
frame fate, performance, and power consumption.
width, number of toggling pins, and other factors – the higher the BUSCLK, the higher the CPU
performance and power consumption.
affects power consumption – the higher the voltage, the higher the consumption.
the resolution/color depth and number of LCD panel signals, the higher the power consumption.
If the High Performance option is turned on, the power consumption increases to that of
8 bit-per-pixel mode for all color depths.
substantial effect on power consumption. An inactive bus (e.g. BUSCLK = low, Addr = low etc.)
reduces overall system power consumption.
savings.
DD
voltage levels (Core and IO): the voltage level of the Core and IO sections in the S1D13705
X27A-G-006-02
S1D13705
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