TMS320DM647 datasheet(120/166 Pages) TI

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6.15 Host-Port Interface (HPI) Peripheral

6.15.1 HPI Device-Specific Information

6.15.2 HPI Peripheral Register Description(s)

TMS320DM647/TMS320DM648

Digital Media Processor

SPRS372 – MAY 2007

The DM647/DM648 devices include a user-configurable 16-bit or 32-bit host-port interface (HPI16/HPI32).

The AEA14 pin controls the HPI_WIDTH, allowing the user to configure the HPI as a 16-bit or 32-bit

peripheral.

Software handshaking via the HRDY bit of the Host Port Control Register (HPIC) is not supported on the

DM647/DM648.

An HPI boot is terminated using a DSP interrupt. The DSP interrupt is registered in bit 0 (channel 0) of the

EDMA Event Register (ER). This event must be cleared by software before triggering transfers on DMA

channel 0.

Table 6-50. HPI Control Registers

HEX ADDRESS RANGE

ACRONYM

COMMENTS

0x0200 0000

Reserved

PWREMU_MGMT has both

0x0200 0004

PWREMU_MGMT

HPI power and emulation management register

host/CPU read/write access.

0x0200 0008 - 0x0200 0024

Reserved

0x0200 0028

Reserved

0x0200 002C

Reserved

The host and the CPU have

0x0200 0030

HPIC

HPI control register

read/write access to the

HPIC register.(1)

HPIA

HPI address register

The host has read/write

0x0200 0034

(HPIAW)(2)

(Write)

access to the HPIA registers.

The CPU has only read

HPIA

HPI address register

0x0200 0038

access to the HPIA registers.

(HPIAR)(2)

(Read)

0x0200 000C - 0x0200 007F

Reserved

0x0200 0080 - 0x0200 FFFF

Reserved

(1)

The CPU can write 1 to the HINT bit to generate an interrupt to the host and it can write 1 to the DSPINT bit to clear/acknowledge an

interrupt from the host.

(2)

There are two 32-bit HPIA registers: HPIAR for read operations and HPIAW for write operations. The HPI can be configured such that

HPIAR and HPIAW act as a single 32-bit HPIA (single-HPIA mode) or as two separate 32-bit HPIAs (dual-HPIA mode) from the

perspective of the host. The CPU can access HPIAW and HPIAR independently. For details about the HPIA registers and their modes,

see theTMS320DM647/DM648 DSP Host Port Interface (HPI) User's Guide (literature number SPRUEL5).

120

Peripheral Information and Electrical Specifications

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