DSP56307 View Datasheet(PDF) - Motorola => Freescale
Part Name
Description
Manufacturer
DSP56307 Datasheet PDF : 156 Pages
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Signals/Connections
HI08
Table 1-10 Host Interface
Signal Name
H0ÐH7
Type
Input/
Output
State
During
Reset
Signal Description
Tri-stated
Host DataÑWhen the HI08 is programmed to
interface a nonmultiplexed host bus and the HI
function is selected, these signals are lines 0Ð7 of the
data bidirectional, tri-state bus.
HAD0ÐHAD7 Input/
Output
Host AddressÑWhen HI08 is programmed to
interface a multiplexed host bus and the HI function
is selected, these signals are lines 0Ð7 of the
address/data bidirectional, multiplexed, tri-state
bus.
PB0ÐPB7
Input or
Output
Port B 0Ð7ÑWhen the HI08 is configured as GPIO
through the host port control register (HPCR), these
signals are individually programmed as inputs or
outputs through the HI08 data direction register
(HDDR).
HA0
Input
Input
Note: This signal has a weak keeper to maintain the last state
even if all drivers are tri-stated.
Host Address Input 0ÑWhen the HI08 is
programmed to interface a nonmultiplexed host bus
and the HI function is selected, this signal is line 0 of
the host address input bus.
HAS/HAS
Input
Host Address StrobeÑWhen HI08 is programmed
to interface a multiplexed host bus and the HI
function is selected, this signal is the host address
strobe (HAS) Schmitt-trigger input. The polarity of
the address strobe is programmable but is
configured active-low (HAS) following reset.
PB8
Input or
Output
Port B 8ÑWhen the HI08 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
1-14
DSP56307 Technical Data
MOTOROLA
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