DSP56311VF150 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

DSP56311VF150

24-Bit Digital Signal Processor

Motorola => Freescale 

Host Interface (HI08)

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 host interface 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

PB15

Input or Output

Receive Host Request—When the HI08 is programmed to

interface with a double host request host bus and the host

interface 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.

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

HI08 Port Control Register, this signal is individually programmed

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

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, these lines have weak keepers that maintain the last output state even if the

drivers are tri-stated.

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

1-13

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