Epson Research and Development

Page 11

Vancouver Design Center

4 Direct Connection to the Philips PR31500/PR31700

4.1 Hardware Description

The S1D13504 is easily interfaced to the Philips PR31500/PR31700 processor. In the direct connection implementation, the S1D13504 occupies PC Card slot #1 of the PR31500/PR31700. Although the address bus of the PR31500/PR31700 is multiplexed, it can be demultiplexed using an advanced CMOS latch (e.g., 74ACT373). The direct connection implementation makes use of the Generic MPU host bus interface capability of the S1D13504.

The following diagram demonstrates a typical implementation of the PR31500/PR31700 to S1D13504 interface.

 

 

 

 

 

S1D13504

PR31500/PR31700

 

 

 

+3.3V

IO VDD, CORE VDD

 

 

 

 

 

 

 

 

 

/RD

 

 

 

 

RD0#

 

 

 

 

RD1#

/WE

 

 

 

 

 

 

 

 

 

/CARD1CSL

 

 

 

 

WE0#

/CARD1CSH

 

 

 

 

WE1#

 

 

 

 

 

CS#

 

Latch

 

A23

 

M/R#

 

 

 

 

ALE

 

 

 

System RESET

RESET#

 

 

 

A[20:13]

A[12:0]

 

 

 

AB[20:13]

 

 

 

 

 

 

 

 

 

AB[12:0]

D[31:24]

 

 

 

 

DB[7:0]

D[23:16]

VDD

15K pull-up

 

 

DB[15:8]

 

 

 

 

/CARD1WAIT

 

 

 

 

WAIT#

 

 

 

 

See text

ENDIAN

 

 

 

BUSCLK

 

 

 

 

DCLKOUT

Clock divider

...or...

Oscillator

CLKI

 

 

 

 

Note:

When connecting the S1D13504 RESET# pin, the system designer should be aware of all conditions that may reset the S1D13504 (e.g. CPU reset can be asserted during wake-up from power-down modes, or during debug states).

Figure 4-1: Typical Implementation of S1D13504 to PR31500/PR31700 Direct Connection

Note

For pin mapping see Table 3-1:, “Generic MPU Host Bus Interface Pin Mapping”.

Interfacing to the Philips MIPS PR31500/PR31700 Processor

S1D13504

Issue Date: 01/02/02

X19A-G-005-08

Page 371
Image 371
Epson S1D13504 manual Direct Connection to the Philips PR31500/PR31700, Hardware Description