DSP56303 datasheet(13/292 Pages) FREESCALE

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Manual Revision History for Revision 2

DSP56303 User’s Manual, Rev. 2

Freescale Semiconductor

1-3

Pins or signals that are asserted low (made active when pulled to ground) are indicated like

this:

— In text, they have an overbar: for example, RESET is asserted low.

— In code examples, they have a tilde in front of their names. In Example 1-1, line 3

refers to the SS0 signal (shown as ~SS0).

Sets of signals are indicated by the first and last signals in the set, for instance HAD[0–7].

“Input/Output” indicates a bidirectional signal. “Input or Output” indicates a signal that is

exclusively one or the other.

Code examples are displayed in a monospaced font, as shown in Example 1-1.

Hexadecimal values are indicated with a $ preceding the value, as follows: $FFFFFF is the

X memory address for the core interrupt priority register.

The word “reset” is used in four different contexts in this manual:

— the reset signal, written as RESET

— the reset instruction, written as RESET

— the reset operating state, written as Reset

— the reset function, written as reset

1.3 Manual Revision History for Revision 2

Table 1-2 lists the changes made in this manual from Revision 1 to Revision 2.

Example 1-1. Sample Code Listing

BFSET#$0007,X:PCC; Configure:

line 1

;

MISO0, MOSI0, SCK0 for SPI master

line 2

; ~SS0 as PC3 for GPIO

line 3

Table 1-2. Change History, Revision 1 to Revision 2

Change

Revision 1

Page Number

Revision 2

Page Number

Modified signal definitions. Changed all five notes in Table 2-1. All internal

keepers are disabled and do not affect device operation.

Page 2-1

Modified signal definitions. Added a note 4, pertaining to GND, at the bottom of

Figure 2-1.

Page 2-2

Modified signal definitions. Changed the note at the end of Table 2-3.

Page 2-4

Modified signal definitions. In Table 2-8, changed the State During Reset, Stop,

or Wait descriptions for the BR and BB signals.

Pages 2-7 to

2-8

Pages 2-6 to

2-7

Modified signal definitions. In Table 2-11, changed the title of the third column to

State During Reset1,2 Added a new note 1 and changed the old note 1 to note 2.

Changed the State During Reset of all signals to “Ignored input.” Changed the

signal description for PB14.

Pages 2-11 to

2-14

Pages 2-10 to

2-12

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