Motorola DSP56012 Manuel D’Utilisation
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.
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.
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.
not selected.
After reset, the default state for this signal is GPIO
input.
input.
Table 2-6
Host Interface (Continued)
Signal Name
Type
State During
Reset
Signal Description