Epson Research and Development

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Vancouver Design Center

 

 

 

3 S1D13705 Host Bus Interface

This section is a summary of the host bus interface modes available on the S1D13705 that would be used to interface to the TMPR3912.

The S1D13705 implements a 16-bit interface to the host microprocessor which may operate in one of several modes compatible with most of the popular embedded microprocessor families. The interface modes used for the TMPR3912 are:

Generic #1 (Chip Select, plus individual Read Enable/Write Enable for each byte).

Generic #2 (External Chip Select, shared Read/Write Enable for high byte, individual Read/Write Enable for low byte).

3.1Host Bus Pin Connection

The following table shows the functions of each host bus interface signal.

Table 3-1: Host Bus Interface Pin Mapping

S1D13705

Generic #1

Generic #2

Pin Names

 

 

 

 

 

AB[15:1]

A[15:1]

A[15:1]

 

 

 

AB0

A0

A0

 

 

 

DB[15:0]

D[15:0]

D[15:0]

 

 

 

WE1#

WE1#

BHE#

 

 

 

CS#

External Decode

External Decode

 

 

 

BCLK

BCLK

BCLK

 

 

 

BS#

connect to VSS

connect to IO VDD

 

 

 

RD/WR#

RD1#

connect to IO VDD

 

 

 

RD#

RD0#

RD#

 

 

 

WE0#

WE0#

WE#

 

 

 

WAIT#

WAIT#

WAIT#

 

 

 

RESET#

RESET#

RESET#

 

 

 

For configuration details, refer to the S1D13705 Hardware Functional Specification, document number X27A-A-001-xx.

Interfacing to the Toshiba MIPS TMPR3912 Microprocessor

S1D13705

Issue Date: 01/02/13

X27A-G-004-02

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Image 369
Epson S1D13705 Host Bus Interface, Host Bus Pin Connection, S1D13705 Generic #1 Generic #2 Pin Names, AB151 A151