Page 14 Epson Research and Development
Vancouver Design Center
S1D13505 Hardware Functional Specification
X23A-A-001-14 Issue Date: 01/02/02
2.7 Miscellaneous
The memory data bus, MD[15:0], is used to co nfigure the chip at power-on.
Three General Purpose Input/Output pins, GPIO[3:1], are available if the upper Memory
Address pins are not required for asymmetric DRAM support.
Suspend power save mode can be initiated by either hardware or software.
The SUSPEND# pin is used either as an input to initiate Suspend mode, or as a General Purpose
Output that can be used to control the LCD backlight. Power-on polarity is selected by an MD
configuration pin.
Operating voltages from 2.7 volts to 5.5 volts are supported
128-pin QFP15 surface mount package