DSP56362P datasheet(16/152 Pages) FREESCALE

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Host Interface (HDI08)

DSP56362 Technical Data, Rev. 4

2-10

Freescale Semiconductor

Table 2-9 Host Interface

Signal Name

Type

State during Reset

Signal Description

H0–H7

HAD0–HAD7

PB0–PB7

Input/Output

Input, Output, or

Disconnected

GPIO Disconnected Host Data—When the HDI08 is programmed to interface a

nonmultiplexed host bus and the HI function is selected, these

signals are lines 0–7 of the bidirectional, tri-state data bus.

Host Address—When HDI08 is programmed to interface a

multiplexed host bus and the HI function is selected, these

signals are lines 0–7 of the address/data bidirectional,

multiplexed, tri-state bus.

Port B 0–7—When the HDI08 is configured as GPIO, these

signals are individually programmable as input, output, or

internally disconnected.

The default state after reset for these signals is GPIO

disconnected.

This input is 5 V tolerant.

HA0

HAS/HAS

PB8

Input

Input, output, or

disconnected

GPIO Disconnected Host Address Input 0—When the HDI08 is programmed to

interface a nonmultiplexed host bus and the HI function is

selected, this signal is line 0 of the host address input bus.

Host Address Strobe—When HDI08 is programmed to

interface a multiplexed host bus and the HI function is selected,

this signal is the host address strobe (HAS) Schmitt-trigger input.

The polarity of the address strobe is programmable, but is

configured active-low (HAS) following reset.

Port B 8—When the HDI08 is configured as GPIO, this signal is

individually programmed as input, output, or internally

disconnected.

The default state after reset for this signal is GPIO disconnected.

This input is 5 V tolerant.

HA1

HA8

PB9

Input

Input, Output, or

Disconnected

GPIO Disconnected Host Address Input 1—When the HDI08 is programmed to

interface a nonmultiplexed host bus and the HI function is

selected, this signal is line 1 of the host address (HA1) input bus.

Host Address 8—When HDI08 is programmed to interface a

multiplexed host bus and the HI function is selected, this signal

is line 8 of the host address (HA8) input bus.

Port B 9—When the HDI08 is configured as GPIO, this signal is

individually programmed as input, output, or internally

disconnected.

The default state after reset for this signal is GPIO disconnected.

This input is 5 V tolerant.

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