Motorola DSP56301 Functional Signal Groupings, Enhanced Synchronous Serial Interfaces ESSI0

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 2-1and 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	Detailed
		Signals	Description
Power (VCC)		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 A1	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 B2	52	Table 2-11
			Table 2-12
Enhanced Synchronous Serial Interfaces (ESSI0 and	Ports C and D3	12	Table 2-13and
ESSI1)			Table 2-14
Serial Communications Interface (SCI)	Port E4	3	Table 2-15
Timers5		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.

Signals/Connections 2-1