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Epson Research and Development

 

Vancouver Design Center

 

 

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

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