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Motorola DSP56012 User Manual

Page 52

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2-12

DSP56012 User’s Manual

MOTOROLA

Signal Descriptions

Host Interface (HI)

HACK

PB14

Input

Input/

Output

Input

Host Acknowledge—

This input has two functions. It

provides a host acknowledge handshake signal for
DMA transfers and it receives a host interrupt
acknowledge compatible with MC68000 family
processors.

Note:

HACK should always be pulled high when it is
not in use.

Port B GPIO 14 (PB14)

—This signal is a General

Purpose I/O signal (PB14) when the Host Interface is
not selected.

After reset, the default state for this signal is GPIO
input.

Table 2-6

Host Interface (Continued)

Signal Name

Type

State During

Reset

Signal Description