DSP56366 View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

DSP56366

24-Bit Audio Digital Signal Processor

Freescale Semiconductor 

Table 2-9 Host Interface (continued)

Signal Name

Type

State during

Reset

Signal Description

HA2

Input

GPIO

Host Address Input 2—When the HDI08 is programmed to interface a

disconnected non-multiplexed host bus and the HI function is selected, this signal is line 2

of the host address (HA2) input bus.

HA9

Input

GPIO

Host Address 9—When HDI08 is programmed to interface a multiplexed

disconnected host bus and the HI function is selected, this signal is line 9 of the host

address (HA9) input bus.

PB10

Input, Output, or

Disconnected

GPIO

disconnected

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

Input

GPIO

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

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

Host Read/Write (HRW) input.

HRD/

HRD

Input

GPIO

disconnected

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.

PB11

Input, Output, or

Disconnected

GPIO

disconnected

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

Input

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.

HWR/

HWR

Input

GPIO

disconnected

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.

PB12

Input, output, or

disconnected

GPIO

Port B 12—When the HDI08 is configured as GPIO, this signal is

disconnected 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.

HCS

Input

GPIO

disconnected

Host Chip Select—When HDI08 is programmed to interface a

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

host chip select (HCS) input. The polarity of the chip select is

programmable, but is configured active-low (HCS) after reset.

2-10

DSP56366 Technical Data, Rev. 3.1

Freescale Semiconductor

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