TMS320VC5407 datasheet(35/110 Pages) TI

35 / 110 page

Functional Overview

November 2001 − Revised April 2004

SPRS007D

3.7.2 HPI Nonmultiplexed Mode

In nonmultiplexed mode, a host with separate address/data buses can access the HPI16 data register (HPID)

via the HD 16-bit bidirectional data bus, and the address register (HPIA) via the 23-bit HA address bus. The

host initiates the access with the strobe signals (HDS1, HDS2, HCS) and controls the direction of the access

with the HR/W signal. The HPI16 can stall host accesses via the HRDY signal. Note that the HPIC register

is not available in nonmultiplexed mode since there are no HCNTL signals available. All host accesses initiate

a DMA read or write access. Figure 3−10 shows a block diagram of the HPI16 in nonmultiplexed mode.

HPID[15:0]

HAS

HDS1, HDS2, HCS

DMA

PPD[15:0]

DATA[15:0]

Address[22:0]

R/W

Data Strobes

READY

HPI16

HRDY

54xx

CPU

VCC

HCNTL0

HCNTL1

HR/W

HINT

HBIL

HOST

Figure 3−10. Host-Port Interface — Nonmultiplexed Mode

Address (Hex)

Reserved

DARAM0

DARAM1

7FFF

6000

5FFF

3FFF

4000

1FFF

2000

005F

0060

0000

Reserved

8000

9FFF

A000

FFFF

DARAM3†

DARAM2†

DARAM4†

† Reserved on 5404 devices

Figure 3−11. HPI Memory Map

TMS320VC5407 Datasheet(PDF) 35 Page - Texas Instruments

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