sed1374 ETC-unknow, sed1374 Datasheet - Page 275

• Manufacturer Part Number: sed1374
• Description: Sed1374 Embedded Memory Color Lcd Controller
• Manufacturer: ETC-unknow

Epson Research and Development
Vancouver Design Center
1 SED1374 Power Consumption
Power Consumption
Issue Date: 98/10/27
Note
SED1374 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 SED1374 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 SED1374: 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 SED1374. 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 SED1374
X26A-G-006-01
SED1374
Page 3