Epson S1D13705 Power Save Modes, Software Power Save Mode, Hardware Power Save Mode

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13 Power Save Modes

Two Power Save Modes have been incorporated into the S1D13705 to accommodate the need for power reduction in the hand-held devices market. These modes are enabled as follows:

Table 13-1: Power Save Mode Selection

Hardware Power	Software Power	Software Power	Mode
Save	Save Bit 1	Save Bit 0
Not Configured or 0	0	0	Software Power Save Mode
Not Configured or 0	0	1	reserved
Not Configured or 0	1	0	reserved
Not Configured or 0	1	1	Normal Operation
Configured and 1	X	X	Hardware Power Save Mode

13.1 Software Power Save Mode

Software Power Save Mode saves power by powering down the panel and stopping display refresh accesses to the display buffer.

Table 13-2: Software Power Save Mode Summary

•Registers read/write accessible

•Memory read/write accessible

•Look-Up Table registers not accessible

•LCD outputs are forced low

13.2Hardware Power Save Mode

Hardware Power Save Mode saves power by powering down the panel, stopping accesses to the display buffer and registers, and disabling the Host Bus Interface.

Table 13-3: Hardware Power Save Mode Summary

•Host Interface not accessible

•Memory read/write not accessible

•Look-Up Table registers not accessible

•LCD outputs are forced low

S1D13705	Hardware Functional Specification
X27A-A-001-10	Issue Date: 02/02/01