DSP56309D View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

DSP56309D

24-Bit Digital Signal Processor

Motorola => Freescale 

Host Interface (HI08)

Freescale Semiconductor, Inc.

Table 1-11. Host Interface (Continued)

Signal Name

HACK/HACK

Type

Input

State During

Reset1,2

Signal Description

Ignored Input

Host Acknowledge—When the HI08 is programmed to interface

with a single host request host bus and the HI function is selected,

this signal is the host acknowledge (HACK) Schmitt-trigger input.

The polarity of the host acknowledge is programmable but is

configured as active-low (HACK) after reset.

HRRQ/HRRQ

Output

Receive Host Request—When the HI08 is programmed to

interface with a double host request host bus and the HI function is

selected, this signal is the receive host request (HRRQ) output.

The polarity of the host request is programmable but is configured

as active-low (HRRQ) after reset. The host request may be

programmed as a driven or open-drain output.

PB15

Input or Output

Port B 15—When the HI08 is configured as GPIO through the

HI08 Port Control Register, this signal is individually programmed

as an input or output through the HI08 Data Direction Register.

Notes: 1. In the Stop state, the signal maintains the last state as follows:

• If the last state is input, the signal is an ignored input.

• If the last state is output, the signal is tri-stated.

2. The Wait processing state does not affect the signal state.

3. All inputs are 5 V tolerant.

1-12

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