Epson S1D13504 manual Direct Connection to the Toshiba TX3912, Hardware Description

Models: S1D13504

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Epson Research and Development

Page 11

Vancouver Design Center

4 Direct Connection to the Toshiba TX3912

4.1 Hardware Description

The S1D13504 is easily interfaced to the Toshiba TX3912 processor. In the direct connection implementation, the S1D13504 occupies PC Card slot #1 of the TX3912. Although the address bus of the TX3912 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 TX3912 to S1D13504 interface.

 

 

 

 

 

S1D13504

TX3912

 

 

 

+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 TX3912 to S1D13504 Direct Connection

Note

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

Interfacing to the Toshiba MIPS TX3912 Processor

S1D13504

Issue Date: 01/02/02

X19A-G-012-04

Page 491
Image 491
Epson S1D13504 manual Direct Connection to the Toshiba TX3912, Hardware Description