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Epson Research and Development

 

Vancouver Design Center

 

 

4 VR4181A to S1D13705 Interface

4.1 Hardware Description

The NEC VR4181A microprocessor is specifically designed to support an external LCD controller by providing the internal address decoding and control signals necessary. By using the Generic # 2 interface, a glueless interface is achieved. The diagram below shows a typical implementation of the VR4181A to S1D13705 interface.

NEC VR4181A

#MEMWR

 

#UBE

 

#MEMRD

 

#LCDCS

Pull-up

 

IORDY

 

#MEMCS16

 

 

System RESET

A[16:0]

 

D[15:0]

 

 

Oscillator

 

Vcc

 

Vcc

Note:

When connecting the S1D13705 RESET# pin, the system designer should be aware of all conditions that may reset the S1D13705 (e.g. CPU reset can be asserted during wake-up from power-down modes, or during debug states).

S1D13705

WE0#

WE1#

RD#

CS#

WAIT#

RESET#

AB[15:0]

DB[15:0]

BCLK

BS#

RD/WR#

Figure 4-1: Typical Implementation of VR4181A to S1D13705 Interface

S1D13705

Interfacing to the NEC VR4181A™ Microprocessor

X27A-G-013-02

Issue Date: 01/02/13

Page 540
Image 540
Epson technical manual Typical Implementation of VR4181A to S1D13705 Interface