S1D13503 Epson Electronics America, Inc., S1D13503 Datasheet - Page 150

• Manufacturer Part Number: S1D13503
• Description: S1d13503 Graphics Lcd Controller
• Manufacturer: Epson Electronics America, Inc.

Page 54
5.6 Power Saving
5.6.1 Registers
bits 7-6
5.6.2 Power Save Modes
S1D13503
X18A-G-002-06
AUX[03] Mode Register 1
I/O address = 0011b, Read/Write
PS
Bit 1
The following section introduces the power saving capabilities of the S1D13503. A detailed description of the Power Save
Register is provided, followed by a description of the power save modes.
Register bits discussed in this section are highlighted.
Two software-controlled Power Save Modes have been incorporated into the S1D13503 to accommodate the important
need for power reduction in the hand-held devices market. These modes can be enabled by setting the 2 Power Save bits
(AUX[03h] bits 7-6).
The various settings are:
5.6.2.1 Power Save Mode 1
Power Save Mode 1 would typically be used when power savings are required and display memory accesses may occur.
The disadvantage is that since the oscillator is running, this mode consumes more power that Power Save Mode 2.
5.6.2.2 Power Save Mode 2
Power Save Mode 2 is typically used when display memory accesses would not occur.
Bit 7 Bit 6
0
0
1
1
Table 5-3: Power Save Mode Selection
PS
Bit 0
0
1
0
1
PS Bits [1:0]
Selects the Power Save Modes as shown in the following table. The PS bits [1:0] go low on RESET.
For more details refer to “Power Save Modes” in the S1D13503 Hardware Functional Specification, Draw-
ing Office No. X18A-A-001-xx.
PS1
0
0
1
1
Table 5-2: Power Save Mode Selection
LCD Signal
State
PS0
Power Save Mode 1
Power Save Mode 2
Normal Operation
0
1
0
1
Mode Activated
Reserved
LUT
Bypass
Power Save Mode 1
Power Save Mode 2
Normal Operation
Mode Activated
Reserved
LCD Data
Width Bit 1
BW /
256 colors
Epson Research and Development
Color Mode
Programming Notes and Examples
Vancouver Design Center
Line Byte
Count Bit 8
Issue Date: 01/01/30