Signals/Connections; Dsp56303 Functional Signal Groupings - Motorola DSP56303 User Manual

Chapter 2

Signals/Connections

The DSP56303 input and output signals are organized into functional groups, as shown in
Table 2-1 and illustrated in Figure 2-1. The DSP56303 operates from a 3 V supply; however,
some of the inputs can tolerate 5 V. A special notice for this feature is added to the signal
descriptions of those inputs.
Functional Group
Power (V )
CC
Ground (GND)
Clock
PLL
Address bus
Data bus
Bus control
Interrupt and mode control
HI08
ESSI
SCI
5
Timer
OnCE/JTAG Port
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 HI08 port signals multiplexed with the GPIO signals. All Port B signals have keepers.
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 C signals have keepers.
5. All timer signals have keepers.
Table 2-1. DSP56303 Functional Signal Groupings
Port A
Port B
Ports C and D
Port E
Signals/Connections
Number of Signals
18
19
2
3
18
1
24
13
5
2 16
3 12
4 3
3
6
Description and Page
Table 2-2 on page 2-3
Table 2-3 on page 2-4
Table 2-4 on page 2-5
Table 2-5 on page 2-5
Table 2-6 on page 2-6
Table 2-7 on page 2-6
Table 2-8 on page 2-6
Table 2-9 on page 2-9
Table 2-11 on page 2-11
Table 2-12 on page 2-15
Table 2-13 on page 2-17
Table 2-14 on page 2-19
Table 2-15 on page 2-20
Table 2-16 on page 2-21
2-1