DSP56367 datasheet(13/100 Pages) FREESCALE

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Parallel Host Interface (HDI08)

DSP56367 Technical Data, Rev. 2.1

Freescale Semiconductor

2-9

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 3.3V 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 3.3V 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 3.3V tolerant.

Table 2-9 Host Interface (continued)

Signal Name

Type

State During

Reset

Signal Description

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