Page 12 Epson Research and Development
Vancouver Design Center
S1D13505 Hardware Functional Specification
X23A-A-001-14 Issue Date: 01/02/02
2 Features

2.1 Memory Interface

16-bit DRAM interface:
EDO-DRAM up to 40MHz data rate (80M bytes/sec.).
FPM-DRAM up to 25MHz data rate (50M bytes/sec.).
Memory size options:
512K bytes using one 256K×16 device.
2M bytes using one 1M×16 device.
Performance Enhancement Register to tailor the memory control output timing for the DRAM
device.

2.2 CPU Interface

Supports the following interfaces:
8/16-bit SH-4 bus interface.
8/16-bit SH-3 bus interface.
8/16-bit interface to 8/16/32-bit MC68000 microprocessors/microcontrollers.
8/16-bit interface to 8/16/32-bit MC68030 microprocessors/microcontrollers.
Philips PR31500/PR31700 (MIPS).
Toshiba TX3912 (MIPS)
16-bit Power PC (MPC821) microprocessor.
16-bit Epson E0C33 microprocessor.
PC Card (PCMCIA).
StrongARM (PC Card).
NEC VR41xx (MIPS).
ISA bus.
Supports the following interface with external logic:
GX486 microprocessor.
One-stage write buffer for minimum wait-state CPU writes.
Registers are memory-mapped – the M/R# pin selects between the display buffer and register
address space.
The complete 2M byte display buffer address space is addressable as a single linear address
space through the 21-bit address bus.