Motorola DSP56301 - Manual (Page 31)

Signals/Connections 2 -1
Chapter 2
Signals/Connections
The DSP56301 input and output signals are organized into functional groups, as shown in
Table 2-1. Two different configurations are illustrated in Figure 2-1 and Figure 2-2. The
difference between these two configurations is the host port functionality. Although the
DSP56301 operates from a 3.3 volt supply, some of the input pins can tolerate 5 volts. A
special notice for this feature is added to the description of these pins.
Table 2-1. DSP56301 Functional Signal Groupings
Functional Group
Number of
Signals
Detailed
Description
Power (V
CC
) 25 Table 2-2
Ground (GND) 26 Table 2-3
Clock 2 Table 2-4
Phase-Lock Loop (PLL) 3 Table 2-5
Address bus
Port A 1
24 Table 2-6
Data bus 24 Table 2-7
Bus control 15 Table 2-8
Interrupt and mode control 5 Table 2-9
Host Interface (HI32) Port B
2
52 Table 2-11
Table 2-12
Enhanced Synchronous Serial Interfaces (ESSI0 and
ESSI1) Ports C and D
3
12 Table 2-13 and
Table 2-14
Serial Communications Interface (SCI) Port E 4 3 Table 2-15
Timers
5
3 Table 2-16
JTAG/OnCE Port 6 Table 2-17
Notes: 1. Port A signals define the external memory interface port, including the external address bus, data bus, and
control signals. The data bus lines have internal keepers.
2. Port B signals are the HI32 port signals multiplexed with the GPIO signals.
3. Port C and D signals are the two ESSI port signals multiplexed with the GPIO signals. All Port C and D
signals have keepers.
4. Port E signals are the SCI port signals multiplexed with the GPIO signals. All Port E signals have keepers.
5. All timer signals have keepers.