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DSP56311 Overview
1.8 DMA
The DMA block has the following features:
Six DMA channels supporting internal and external accesses
One-, two-, and three-dimensional transfers (including circular buffering)
End-of-block-transfer interrupts
Triggering from interrupt lines and all peripherals
1.9 Peripherals
In addition to the core features, the DSP56311 provides the following peripherals:
As many as 34 user-configurable GPIO signals
HI08 to external hosts
Dual ESSI
SCI
Triple timer module
Memory switch mode
Four external interrupt/mode control lines
1.9.1 GPIO Functionality
The GPIO port consists of up to 34 programmable signals, also used by the peripherals (HI08,
ESSI, SCI, and timer). There are no dedicated GPIO signals. After a reset, the signals are
automatically configured as GPIO. Three memory-mapped registers per peripheral control GPIO
functionality. Programming techniques for these registers to control GPIO functionality are
1.9.2 HI08
The HI08 is a byte-wide, full-duplex, double-buffered parallel port that can connect directly to
the data bus of a host processor. The HI08 supports a variety of buses and provides connection
with a number of industry-standard DSPs, microcomputers, and microprocessors without
requiring any additional logic. The DSP core treats the HI08 as a memory-mapped peripheral
occupying eight 24-bit words in data memory space. The DSP can use the HI08 as a
memory-mapped peripheral, using either standard polled or interrupt programming techniques.
Separate double-buffered transmit and receive data registers allow the DSP and host processor to
transfer data efficiently at high speed. Memory mapping allows you to program DSP core
communication with the HI08 registers using standard instructions and addressing modes.
DSP56311 User’s Manual, Rev. 2
1-12
Freescale Semiconductor
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