Page 12 Epson Research and Development
Vancouver Design Center
S1D13504 Hardware Functional Specification
X19A-A-002-18 Issue Date: 01/01/30
2 Features

2.1 Memory Interface

16-bit DRAM interface:
EDO-DRAM up to 40MHz data rate (80M bytes per second).
FPM-DRAM up to 25MHz data rate (50M bytes per second).
Memory size options:
512K bytes using one 256K×16 device.
2M bytes using one 1M×16 device.
A configuration register can be programmed to enhance performance by tailoring the memory
control output timing to the DRAM device.

2.2 CPU Interface

Supports the following interfaces:
8/16-bit Hitachi SH-3 bus interface.
16-bit interface to 16/32-bit Motorola MC68K microprocessors/microcontrollers .
Philips MIPS PR31500 / PR31700.
•NEC MIPS V
R4102.
8/16-bit generic interface bus.
One-Stage write buffer for minimum wait-state CPU writes.
Registers are memory-mapped; M/R# pin selects between memory and register address space.
The complete 2M byte display buffer address space is directly and contiguously available
through the 21-bit address bus.

2.3 Display Support

4/8-bit monochrome or 4/8/16-bit color passive LCD interface for single-panel, single-drive
displays.
8-bit monochrome or 8/16-bit color passive LCD interface for dual-panel, dual-drive displays.
Direct support for 9/12-bit TFT, 18/24-bit TFT are supported up to 64K color depth (16-bit data).
External RAMDAC support using the upper byte of the LCD data bus for the RAMDAC pixel
data bus.
Simultaneous display of CRT and 4/8-bit passive panel or 9-bit TFT panel:
Normal mode for cases where LCD and CRT image sizes are identical.
Line-Doubling mode for simultaneous display of 240-line images on 240-line LCD and 480-
line CRT.
Even-Scan and interlace modes for simultaneous display of 480-line images on 240-line LCD
and 480-line CRT.