PR31700 datasheet(13/36 Pages) PHILIPS

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Philips Semiconductors

Preliminary specification

PR31700

32-bit RISC microprocessor

1998 May 13

PIN USAGE INFORMATION

This section contains tables summarizing various aspects of the pin

usage for the PR31700. Table 1 lists the standard versus

multi-function usage for each PR31700 pin, if applicable. Those

signal names shown in parentheses are test signals for debugging

purposes only. The column showing the multi-function select signal

and reset state indicates the internal control signal used to select the

multi-function mode, as well as the default configuration of each

multi-function pin during reset. The ”Bus Arb State” column shows

which pins are tri-stated whenever the DGRNT* signal is asserted in

response to a DREQ*(external bus arbitration request).

Table 1. PR31700 Standard and Multi-Function Pin Usage

PR31700 pin

Standard Function

(I = input, O = output)

Multi-function

Multi-function select

(Reset State:

1 = multi-function

mode selected;

0 = standard function

& mode selected)

Bus

Arb

State

D[31:0]

D[31:0] (I/O)

Hi-Z

A[12:0]

A[12:0] (I/O)

ALE

ALE (O)

Hi-Z

RD*

RD* (O)

Hi-Z

WE*

WE* (O)

Hi-Z

CAS0* (WE0*)

CAS0* (O)

Hi-Z

CAS1* (WE1*)

CAS1* (O)

Hi-Z

CAS2* (WE2*)

CAS2* (O)

Hi-Z

CAS3* (WE3*)

CAS3* (O)

Hi-Z

RAS0*

RAS0* (O)

Hi-Z

RAS1* (DCS1*)

RAS1* (O)

Hi-Z

DCS0*

DCS0* (O)

Hi-Z

DCKE

DCKE (O)

Hi-Z

DCLKIN

DCLKIN (I)

DCLKOUT

DCLKOUT (O)

Hi-Z

DQMH

DQMH (O)

Hi-Z

DQML

DQML (O)

Hi-Z

DREQ*

DREQ* (I)

MIO[27]

MIOSEL[27] (0)

DGRNT*

DGRNT* (O)

MIO[26]

MIOSEL[26] (0)

SYSCLKIN

SYSCLKIN (I)

SYSCLKOUT

SYSCLKOUT (O)

C32KlN

C32KIN (I)

C32KOUT

C32KOUT (O)

BC32K

BC32K(O)

MIO[25]

MIOSEL[25] (1)

VDAT[3]

VDAT[3] (O)

(BERR)

IRQTEST (0)

VDAT[2]

VDAT[2] (O)

VDAT[1]

VDAT[1] (O)

(IRQHIGH)

IRQTEST (0)

VDAT[0]

VDAT[0] (O)

(IRQLow)

IRQTEST (0)

CP (O)

LOAD

LOAD (O)

DF (O)

FRAME

FRAME (O)

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