Signals/Connections
2
-1
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.
Table 2-1. DSP56303 Functional Signal Groupings
Functional Group
Number of Signals
Description and Page
Power (V
CC
)
18
Table 2-2 on page 2-3
Ground (GND)
19
Table 2-3 on page 2-4
Clock
2
Table 2-4 on page 2-5
PLL
3
Table 2-5 on page 2-5
Address bus
Port A
1
18
Table 2-6 on page 2-6
Data bus
24
Table 2-7 on page 2-6
Bus control
13
Table 2-8 on page 2-6
Interrupt and mode control
5
Table 2-9 on page 2-9
HI08
Port B
2
16
Table 2-11 on page 2-11
ESSI
Ports C and D
3
12
Table 2-12 on page 2-15
Table 2-13 on page 2-17
SCI
Port E
4
3
Table 2-14 on page 2-19
Timer
5
3
Table 2-15 on page 2-20
OnCE/JTAG Port
6
Table 2-16 on page 2-21
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.
Summary of Contents for DSP56303
Page 1: ...DSP56303 User s Manual 24 Bit Digital Signal Processor DSP56303UM AD Revision 1 January 2001 ...
Page 52: ...JTAG OnCE Interface 2 22 DSP56303 User s Manual ...
Page 114: ...General Purpose Input Output GPIO 5 10 DSP56303 User s Manual ...
Page 212: ...GPIO Signals and Registers 8 26 DSP56303 User s Manual ...
Page 268: ...Interrupt Equates A 22 DSP56303 User s Manual ...
Page 306: ...Programming Sheets B 38 DSP56303 User s Manual ...
Page 320: ...Index 14 DSP56303 User s Manual ...