DSP56307UM 데이터 시트보기 (PDF) - Motorola => Freescale

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DSP56307UM

24-BIT DIGITAL SIGNAL PROCESSOR

Motorola => Freescale 

Signals/Connections

HI08

Table 1-10 Host Interface (Continued)

Signal Name Type

HREQ/HREQ Output

State

During

Reset

Input

Signal Description

Host RequestÑWhen HI08 is programmed to

interface a single host request host bus and the HI

function is selected, this signal is the host request

(HREQ) output. The polarity of the host request is

programmable, but is configured as active-low

(HREQ) following reset. The host request may be

programmed as a driven or open-drain output.

HTRQ/HTRQ Output

Transmit Host RequestÑWhen HI08 is

programmed to interface a double host request host

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

transmit host request (HTRQ) output. The polarity of

the host request is programmable, but is configured

as active-low (HTRQ) following reset. The host

request may be programmed as a driven or

open-drain output.

PB14

Input or

Output

Port B 14ÑWhen the HI08 is programmed to

interface a multiplexed host bus and the signal is

configured as GPIO through the HPCR, this signal is

individually programmed as an input or output

through the HDDR.

Note: This signal has a weak keeper to maintain the last state

even if all drivers are tri-stated.

Not Recommended for New Design

1-18

DSP56307 Technical Data

MOTOROLA

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