DSP56362 datasheet(17/152 Pages) FREESCALE

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Host Interface (HDI08)

DSP56362 Technical Data, Rev. 4

Freescale Semiconductor

2-11

HA2

HA9

PB10

Input

Input, Output, or

Disconnected

GPIO Disconnected Host Address Input 2—When the HDI08 is programmed to

interface a non-multiplexed host bus and the HI function is

selected, this signal is line 2 of the host address (HA2) input bus.

Host Address 9—When HDI08 is programmed to interface a

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

is line 9 of the host address (HA9) input bus.

Port B 10—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.

HRW

HRD/HRD

PB11

Input

Input, Output, or

Disconnected

GPIO Disconnected Host Read/Write—When HDI08 is programmed to interface a

single-data-strobe host bus and the HI function is selected, this

signal is the Host Read/Write (HRW) input.

Host Read Data—When HDI08 is programmed to interface a

double-data-strobe host bus and the HI function is selected, this

signal is the host read data strobe (HRD) Schmitt-trigger input.

The polarity of the data strobe is programmable, but is configured

as active-low (HRD) after reset.

Port B 11—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.

HDS/HDS

HWR/HWR

PB12

Input

Input, Output, or

Disconnected

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

single-data-strobe host bus and the HI function is selected, this

signal is the host data strobe (HDS) Schmitt-trigger input. The

polarity of the data strobe is programmable, but is configured as

active-low (HDS) following reset.

Host Write Data—When HDI08 is programmed to interface a

double-data-strobe host bus and the HI function is selected, this

signal is the host write data strobe (HWR) Schmitt-trigger input.

The polarity of the data strobe is programmable, but is configured

as active-low (HWR) following reset.

Port B 12—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.

Table 2-9 Host Interface (continued)

Signal Name

Type

State during Reset

Signal Description

DSP56362 Datasheet(PDF) 17 Page - Freescale Semiconductor, Inc

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