Epson Research and Development

Page 17

Vancouver Design Center

5.2 Hardware Description—Using Two IT8368E’s

The following implementation uses a second IT8368E, not in VGA mode, in place of an address latch. The pins LHA23 and LHA[20:13] provide the latch function instead.

PR31500/PR31700

 

S1D13504

A[12:0]

 

AB[12:0]

ENDIAN

 

 

 

 

AB[20:13]

D[31:24]

 

DB[7:0]

D[23:16]

 

DB[15:8]

VDD

System RESET

RESET#

pull-up

 

/CARDxWAIT

 

WAIT#

 

 

DCLKOUT

LHA23

M/R#

 

Clock divider

 

IT8368E

...or...

 

 

 

 

Oscillator

BUSCLK

LHA[20:13],

See text

CLKI

 

 

 

LHA23

 

 

 

+3.3V

IO VDD, CORE VDD

 

 

IT8368E

 

 

LHA23/MFIO10

 

WE1#

LHA22/MFIO9

 

WE0#

 

 

LHA21/MFIO8

 

RD1#

 

 

LHA20/MFIO7

 

RD0#

LHA19/MFIO6

Chip Select

CS#

 

 

 

Logic

 

Notes: The Chip Select Logic shown above is necessary to guarantee the timing parameter t1

of the Generic MPU Host Bus Interface Asynchronous Timing (for details refer to the S1D13504 Hardware Functional Specification, document number X19A-A-002-xx).

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 5-2: S1D13504 to PR31500/PR31700 Connection using Two IT8368E

Interfacing to the Philips MIPS PR31500/PR31700 Processor

S1D13504

Issue Date: 01/02/02

X19A-G-005-08

Page 377
Image 377
Epson manual Hardware Description-Using Two IT8368E’s, PR31500/PR31700 S1D13504