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Interfacing to the Philips MIPS PR31500/PR31700 Processor S1D13504
Issue Date: 01/02/02 X19A-G-005-08
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 inter face capabi lity o f

the S1D13504.

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

S1D13504 interface.

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.
RD1#
RD0#
DB[7:0]
WAIT#
BUSCLK
S1D13504
RESET#
AB[20:13]
/RD
D[31:24]
/CARD1WAIT
A[12:0]
PR31500/PR31700
15K pull-up
CLKI
Oscillator
WE1#
WE0#
M/R#
CS#
/WE
/CARD1CSL
/CARD1CSH
A23
Latch
ALE System RESET
A[20:13]
AB[12:0]
ENDIAN
DB[15:8]
D[23:16] VDD
DCLKOUT ...or...
Clock divider
See text
IO VDD, CORE VDD
+3.3V
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).