MOTOROLA
DSP56367
7-1
SECTION 7
GENERAL PURPOSE INPUT/OUTPUT
7.1
INTRODUCTION
The DSP56367 provides up to 37 bidirectional signals that can be configured as GPIO signals
or as peripheral dedicated signals. No dedicated GPIO signals are provided. All of these
signals are GPIO by default after reset. The techniques for register programming for all GPIO
functionality is very similar between these interfaces. This section describes how signals may
be used as GPIO.
7.2
PROGRAMMING MODEL
The signals description section of this manual describes the special uses of these signals in
detail. There are five groups of these signals which can be controlled separately or as groups:
•
Port B: up to 16 GPIO signals (shared with the HDI08 signals)
•
Port C: 12 GPIO signals (shared with the ESAI signals)
•
Port D: two GPIO signals (shared with the DAX signals)
•
Port E: 10 GPIO signals (shared with the ESAI_1 signals)
•
Timer: one GPIO signal (shared with the timer/event counter signal)
7.2.1
PORT B SIGNALS AND REGISTERS
When HDI08 is disabled, all 16 HDI08 signals can be used as GPIO. When HDI08 is enabled,
five (HA8, HA9, HCS, HOREQ, and HACK) of the 16 port B signals, if not used as a HDI08
signal, can be configured as GPIO signals. The GPIO functionality of port B is controlled by
three registers: host port control register (HPCR), host port GPIO data register (HDR), and
host port GPIO direction register (HDDR). These registers are described in Section 8 - Host
Interface (HDI08) of this document.
Summary of Contents for DSP56367
Page 16: ...xvi MOTOROLA CONTENTS Paragraph Number Title Page Number ...
Page 22: ...xxii MOTOROLA List of Figures Figure Number Title Page Number ...
Page 26: ...xxvi MOTOROLA List of Tables Table Number Title Page Number ...
Page 148: ...4 6 DSP56367 MOTOROLA Design Considerations PLL Performance Issues ...
Page 248: ...9 30 DSP56367 MOTOROLA Serial Host Interface SHI Programming Considerations ...
Page 306: ...10 58 DSP56367 MOTOROLA Enhanced Serial Audio Interface ESAI ESAI Initialization Examples ...
Page 389: ...Bootstrap ROM Contents MOTOROLA DSP56367 A 15 end ...
Page 390: ...A 16 DSP56367 MOTOROLA Bootstrap ROM Contents ...
Page 432: ...C 8 DSP56367 MOTOROLA JTAG BSDL ...
Page 484: ...D 52 DSP56367 MOTOROLA Programmer s Reference ...
Page 490: ...E 6 DSP56367 MOTOROLA Power Consumption Benchmark ...
Page 516: ...F 26 DSP56367 MOTOROLA IBIS Model ...
Page 522: ...Index 6 MOTOROLA Index ...
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