Motorola DSP56301 Manual Conventions, High True/Low True Signal Conventions, Ground2, Pin

Manual Conventions

νChapter 6, Host Interface (HI32) HI32 features, signals, architecture, programming model, reset, interrupts, external host programming model, initialization, and a quick reference to the HI32 programming model.

νChapter 7, Enhanced Synchronous Serial Interface (ESSI) Enhancements, data and control signals, programming model, operating modes, initialization, exceptions, and GPIO.

νChapter 8, Serial Communication Interface (SCI) Signals, programming model, operating modes, reset, initialization, and GPIO.

νChapter 9, Triple Timer Module Architecture, programming model, and operating modes of three identical timer devices available for use as internals or event counters.

νAppendix A, Bootstrap Program Bootstrap code for the DSP56301.

νAppendix B, Programming Reference Peripheral addresses, interrupt addresses, and interrupt priorities for the DSP56301; programming sheets list the contents of the major DSP56301 registers for programmer’s reference.

1.2Manual Conventions

This manual uses the following conventions:

νBits within registers are always listed from most significant bit (MSB) to least significant bit (LSB).

νBits within a register are indicated AA[n–m], n > m, when more than one bit is involved in a description. For purposes of description, the bits are presented as if they are contiguous within a register. However, this is not always the case. Refer to the programming model diagrams or to the programming sheets to see the exact location of bits within a register.

νWhen a bit is described as “set,” its value is 1. When a bit is described as “cleared,” its value is 0.

νThe word “assert” means that a high true (active high) signal is pulled high to V CC or that a low true (active low) signal is pulled low to ground. The word “deassert” means

that a high true signal is pulled low to ground or that a low true signal is pulled high to VCC. See Table 1-1.

Table 1-1.High True/Low True Signal Conventions

Signal/Symbol				Logic State	Signal State	Voltage
			1	True	Asserted	Ground2
	PIN
				False	Deasserted	VCC
		PIN
						3

1-2 DSP56301 User’s Manual