DSP56303 datasheet(129/292 Pages) FREESCALE

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Programming Model Quick Reference

DSP56303 User’s Manual, Rev. 2

Freescale Semiconductor

6-29

HPCR

cont.

HREN

Host Request

Enable

HDRQ = 0

HDRQ = 1

HREQ/HTRQ = GPIO

HREQ/HTRQ

HACK/HRRQ = GPIO

HREQ/HTRQ =

HREQ,HREQ/HTRQ

HACK/HRRQ = HTRQ, HRRQ

0—

—

HAEN

Host

Acknowledge

Enable

HDRQ = 0

HDRQ=1

HACK/HRRQ = GPIO

HREQ/HTRQ

HACK/HRRQ = GPIO

HACK/HRRQ = HACK

HREQ/HTRQ

HACK/HRRQ = HTRQ, HRRQ

0—

—

HEN

Host Enable

Host Port = GPIO

Host Port Active

0—

—

Reserved

—

HROD

Host Request

Open Drain

HREQ/HTRQ/HRRQ = driven

HREQ/HTRQ/HRRQ = open drain

HDSP

Host Data Strobe

Polarity

HDS/HRD/HWR active low

HDS/HRD/HWR active high

0—

—

HASP

Host Address

Strobe Polarity

HAS active low

HAS active high

0—

—

HMUX

Host Multiplexed

Bus

Separate address and data lines

Multiplexed address/data

0—

—

HDDS

Host Dual Data

Strobe

Single Data Strobe (HDS)

Double Data Strobe (HWR, HRD)

0—

—

HCSP

Host Chip Select

Polarity

HCS active low

HCS active high

0—

—

HRP

Host Request

Polarity

HREQ/HTRQ/HRRQ active low

HREQ/HTRQ/HRRQ active high

0—

—

HAP

Host

Acknowledge

Polarity

HACK active low

HACK active high

0—

—

Table 6-19. HI08 Programming Model, DSP Side (Continued)

Bit

Reset Type

Bit

No.

Bit

Name

Value

Function

HW/

Indivi-

dual

STOP

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